1022 lines
39 KiB
C#
1022 lines
39 KiB
C#
using Opc.Ua;
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using Opc.Ua.Client;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace OpcUaHelper
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{
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/// <summary>
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/// 辅助类
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/// </summary>
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public class FormUtils
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{
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/// <summary>
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/// Gets the display text for the access level attribute.
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/// </summary>
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/// <param name="accessLevel">The access level.</param>
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/// <returns>The access level formatted as a string.</returns>
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private static string GetAccessLevelDisplayText(byte accessLevel)
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{
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StringBuilder buffer = new StringBuilder();
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if (accessLevel == AccessLevels.None)
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{
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buffer.Append("None");
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}
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if ((accessLevel & AccessLevels.CurrentRead) == AccessLevels.CurrentRead)
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{
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buffer.Append("Read");
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}
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if ((accessLevel & AccessLevels.CurrentWrite) == AccessLevels.CurrentWrite)
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{
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if (buffer.Length > 0)
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{
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buffer.Append(" | ");
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}
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buffer.Append("Write");
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}
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if ((accessLevel & AccessLevels.HistoryRead) == AccessLevels.HistoryRead)
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{
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if (buffer.Length > 0)
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{
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buffer.Append(" | ");
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}
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buffer.Append("HistoryRead");
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}
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if ((accessLevel & AccessLevels.HistoryWrite) == AccessLevels.HistoryWrite)
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{
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if (buffer.Length > 0)
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{
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buffer.Append(" | ");
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}
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buffer.Append("HistoryWrite");
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}
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if ((accessLevel & AccessLevels.SemanticChange) == AccessLevels.SemanticChange)
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{
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if (buffer.Length > 0)
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{
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buffer.Append(" | ");
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}
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buffer.Append("SemanticChange");
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}
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return buffer.ToString();
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}
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/// <summary>
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/// Gets the display text for the event notifier attribute.
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/// </summary>
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/// <param name="eventNotifier">The event notifier.</param>
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/// <returns>The event notifier formatted as a string.</returns>
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private static string GetEventNotifierDisplayText(byte eventNotifier)
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{
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StringBuilder buffer = new StringBuilder();
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if (eventNotifier == EventNotifiers.None)
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{
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buffer.Append("None");
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}
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if ((eventNotifier & EventNotifiers.SubscribeToEvents) == EventNotifiers.SubscribeToEvents)
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{
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buffer.Append("Subscribe");
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}
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if ((eventNotifier & EventNotifiers.HistoryRead) == EventNotifiers.HistoryRead)
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{
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if (buffer.Length > 0)
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{
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buffer.Append(" | ");
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}
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buffer.Append("HistoryRead");
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}
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if ((eventNotifier & EventNotifiers.HistoryWrite) == EventNotifiers.HistoryWrite)
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{
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if (buffer.Length > 0)
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{
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buffer.Append(" | ");
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}
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buffer.Append("HistoryWrite");
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}
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return buffer.ToString();
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}
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/// <summary>
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/// Gets the display text for the value rank attribute.
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/// </summary>
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/// <param name="valueRank">The value rank.</param>
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/// <returns>The value rank formatted as a string.</returns>
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private static string GetValueRankDisplayText(int valueRank)
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{
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switch (valueRank)
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{
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case ValueRanks.Any: return "Any";
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case ValueRanks.Scalar: return "Scalar";
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case ValueRanks.ScalarOrOneDimension: return "ScalarOrOneDimension";
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case ValueRanks.OneOrMoreDimensions: return "OneOrMoreDimensions";
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case ValueRanks.OneDimension: return "OneDimension";
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case ValueRanks.TwoDimensions: return "TwoDimensions";
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}
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return valueRank.ToString();
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}
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/// <summary>
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/// Gets the display text for the specified attribute.
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/// </summary>
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/// <param name="session">The currently active session.</param>
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/// <param name="attributeId">The id of the attribute.</param>
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/// <param name="value">The value of the attribute.</param>
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/// <returns>The attribute formatted as a string.</returns>
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public static string GetAttributeDisplayText(Session session, uint attributeId, Variant value)
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{
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if (value == Variant.Null)
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{
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return String.Empty;
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}
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switch (attributeId)
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{
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case Attributes.AccessLevel:
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case Attributes.UserAccessLevel:
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{
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byte? field = value.Value as byte?;
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if (field != null)
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{
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return GetAccessLevelDisplayText(field.Value);
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}
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break;
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}
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case Attributes.EventNotifier:
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{
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byte? field = value.Value as byte?;
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if (field != null)
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{
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return GetEventNotifierDisplayText(field.Value);
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}
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break;
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}
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case Attributes.DataType:
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{
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return session.NodeCache.GetDisplayText(value.Value as NodeId);
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}
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case Attributes.ValueRank:
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{
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int? field = value.Value as int?;
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if (field != null)
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{
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return GetValueRankDisplayText(field.Value);
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}
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break;
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}
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case Attributes.NodeClass:
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{
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int? field = value.Value as int?;
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if (field != null)
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{
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return ((NodeClass)field.Value).ToString();
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}
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break;
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}
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case Attributes.NodeId:
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{
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NodeId field = value.Value as NodeId;
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if (!NodeId.IsNull(field))
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{
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return field.ToString();
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}
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return "Null";
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}
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}
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// check for byte strings.
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if (value.Value is byte[])
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{
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return Utils.ToHexString(value.Value as byte[]);
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}
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// use default format.
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return value.ToString();
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}
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/// <summary>
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/// Discovers the servers on the local machine.
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/// </summary>
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/// <param name="configuration">The configuration.</param>
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/// <returns>A list of server urls.</returns>
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public static IList<string> DiscoverServers(ApplicationConfiguration configuration)
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{
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List<string> serverUrls = new List<string>();
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// set a short timeout because this is happening in the drop down event.
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EndpointConfiguration endpointConfiguration = EndpointConfiguration.Create(configuration);
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endpointConfiguration.OperationTimeout = 5000;
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// Connect to the local discovery server and find the available servers.
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using (DiscoveryClient client = DiscoveryClient.Create(new Uri("opc.tcp://localhost:4840"), endpointConfiguration))
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{
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ApplicationDescriptionCollection servers = client.FindServers(null);
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// populate the drop down list with the discovery URLs for the available servers.
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for (int ii = 0; ii < servers.Count; ii++)
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{
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if (servers[ii].ApplicationType == ApplicationType.DiscoveryServer)
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{
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continue;
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}
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for (int jj = 0; jj < servers[ii].DiscoveryUrls.Count; jj++)
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{
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string discoveryUrl = servers[ii].DiscoveryUrls[jj];
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// Many servers will use the '/discovery' suffix for the discovery endpoint.
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// The URL without this prefix should be the base URL for the server.
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if (discoveryUrl.EndsWith("/discovery"))
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{
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discoveryUrl = discoveryUrl.Substring(0, discoveryUrl.Length - "/discovery".Length);
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}
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// ensure duplicates do not get added.
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if (!serverUrls.Contains(discoveryUrl))
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{
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serverUrls.Add(discoveryUrl);
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}
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}
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}
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}
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return serverUrls;
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}
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/// <summary>
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/// Finds the endpoint that best matches the current settings.
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/// </summary>
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/// <param name="discoveryUrl">The discovery URL.</param>
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/// <param name="useSecurity">if set to <c>true</c> select an endpoint that uses security.</param>
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/// <returns>The best available endpoint.</returns>
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public static EndpointDescription SelectEndpoint(string discoveryUrl, bool useSecurity)
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{
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// needs to add the '/discovery' back onto non-UA TCP URLs.
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if (!discoveryUrl.StartsWith(Utils.UriSchemeOpcTcp))
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{
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if (!discoveryUrl.EndsWith("/discovery"))
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{
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discoveryUrl += "/discovery";
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}
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}
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// parse the selected URL.
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Uri uri = new Uri(discoveryUrl);
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// set a short timeout because this is happening in the drop down event.
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EndpointConfiguration configuration = EndpointConfiguration.Create();
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configuration.OperationTimeout = 5000;
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EndpointDescription selectedEndpoint = null;
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// Connect to the server's discovery endpoint and find the available configuration.
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using (DiscoveryClient client = DiscoveryClient.Create(uri, configuration))
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{
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EndpointDescriptionCollection endpoints = client.GetEndpoints(null);
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// select the best endpoint to use based on the selected URL and the UseSecurity checkbox.
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for (int ii = 0; ii < endpoints.Count; ii++)
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{
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EndpointDescription endpoint = endpoints[ii];
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// check for a match on the URL scheme.
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if (endpoint.EndpointUrl.StartsWith(uri.Scheme))
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{
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// check if security was requested.
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if (useSecurity)
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{
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if (endpoint.SecurityMode == MessageSecurityMode.None)
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{
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continue;
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}
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}
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else
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{
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if (endpoint.SecurityMode != MessageSecurityMode.None)
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{
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continue;
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}
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}
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// pick the first available endpoint by default.
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if (selectedEndpoint == null)
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{
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selectedEndpoint = endpoint;
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}
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// The security level is a relative measure assigned by the server to the
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// endpoints that it returns. Clients should always pick the highest level
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// unless they have a reason not too.
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if (endpoint.SecurityLevel > selectedEndpoint.SecurityLevel)
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{
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selectedEndpoint = endpoint;
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}
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}
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}
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// pick the first available endpoint by default.
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if (selectedEndpoint == null && endpoints.Count > 0)
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{
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selectedEndpoint = endpoints[0];
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}
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}
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// if a server is behind a firewall it may return URLs that are not accessible to the client.
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// This problem can be avoided by assuming that the domain in the URL used to call
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// GetEndpoints can be used to access any of the endpoints. This code makes that conversion.
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// Note that the conversion only makes sense if discovery uses the same protocol as the endpoint.
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Uri endpointUrl = Utils.ParseUri(selectedEndpoint.EndpointUrl);
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if (endpointUrl != null && endpointUrl.Scheme == uri.Scheme)
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{
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UriBuilder builder = new UriBuilder(endpointUrl);
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builder.Host = uri.DnsSafeHost;
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builder.Port = uri.Port;
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selectedEndpoint.EndpointUrl = builder.ToString();
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}
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// return the selected endpoint.
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return selectedEndpoint;
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}
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/// <summary>
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/// Browses the address space and returns the references found.
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/// </summary>
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/// <param name="session">The session.</param>
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/// <param name="nodesToBrowse">The set of browse operations to perform.</param>
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/// <param name="throwOnError">if set to <c>true</c> a exception will be thrown on an error.</param>
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/// <returns>
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/// The references found. Null if an error occurred.
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/// </returns>
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public static ReferenceDescriptionCollection Browse(Session session, BrowseDescriptionCollection nodesToBrowse, bool throwOnError)
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{
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try
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{
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ReferenceDescriptionCollection references = new ReferenceDescriptionCollection();
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BrowseDescriptionCollection unprocessedOperations = new BrowseDescriptionCollection();
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while (nodesToBrowse.Count > 0)
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{
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// start the browse operation.
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BrowseResultCollection results = null;
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DiagnosticInfoCollection diagnosticInfos = null;
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session.Browse(
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null,
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null,
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0,
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nodesToBrowse,
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out results,
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out diagnosticInfos);
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ClientBase.ValidateResponse(results, nodesToBrowse);
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ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
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ByteStringCollection continuationPoints = new ByteStringCollection();
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for (int ii = 0; ii < nodesToBrowse.Count; ii++)
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{
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// check for error.
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if (StatusCode.IsBad(results[ii].StatusCode))
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{
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// this error indicates that the server does not have enough simultaneously active
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// continuation points. This request will need to be resent after the other operations
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// have been completed and their continuation points released.
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if (results[ii].StatusCode == StatusCodes.BadNoContinuationPoints)
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{
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unprocessedOperations.Add(nodesToBrowse[ii]);
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}
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continue;
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}
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// check if all references have been fetched.
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if (results[ii].References.Count == 0)
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{
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continue;
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}
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// save results.
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references.AddRange(results[ii].References);
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// check for continuation point.
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if (results[ii].ContinuationPoint != null)
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{
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continuationPoints.Add(results[ii].ContinuationPoint);
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}
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}
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// process continuation points.
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ByteStringCollection revisedContiuationPoints = new ByteStringCollection();
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while (continuationPoints.Count > 0)
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{
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// continue browse operation.
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session.BrowseNext(
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null,
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true,
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continuationPoints,
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out results,
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out diagnosticInfos);
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ClientBase.ValidateResponse(results, continuationPoints);
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ClientBase.ValidateDiagnosticInfos(diagnosticInfos, continuationPoints);
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for (int ii = 0; ii < continuationPoints.Count; ii++)
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{
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// check for error.
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if (StatusCode.IsBad(results[ii].StatusCode))
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{
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continue;
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}
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// check if all references have been fetched.
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if (results[ii].References.Count == 0)
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{
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continue;
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}
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// save results.
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references.AddRange(results[ii].References);
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// check for continuation point.
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if (results[ii].ContinuationPoint != null)
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{
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revisedContiuationPoints.Add(results[ii].ContinuationPoint);
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}
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}
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// check if browsing must continue;
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revisedContiuationPoints = continuationPoints;
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}
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// check if unprocessed results exist.
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nodesToBrowse = unprocessedOperations;
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}
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// return complete list.
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return references;
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}
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catch (Exception exception)
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{
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if (throwOnError)
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{
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throw new ServiceResultException(exception, StatusCodes.BadUnexpectedError);
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}
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return null;
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}
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}
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/// <summary>
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/// Finds the type of the event for the notification.
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/// </summary>
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/// <param name="monitoredItem">The monitored item.</param>
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/// <param name="notification">The notification.</param>
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/// <returns>The NodeId of the EventType.</returns>
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public static NodeId FindEventType(MonitoredItem monitoredItem, EventFieldList notification)
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{
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EventFilter filter = monitoredItem.Status.Filter as EventFilter;
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if (filter != null)
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{
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for (int ii = 0; ii < filter.SelectClauses.Count; ii++)
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{
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SimpleAttributeOperand clause = filter.SelectClauses[ii];
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if (clause.BrowsePath.Count == 1 && clause.BrowsePath[0] == BrowseNames.EventType)
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{
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return notification.EventFields[ii].Value as NodeId;
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}
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}
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}
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return null;
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}
|
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|
|
/// <summary>
|
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/// Browses the address space and returns the references found.
|
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/// </summary>
|
|
/// <param name="session">The session.</param>
|
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/// <param name="nodeToBrowse">The NodeId for the starting node.</param>
|
|
/// <param name="throwOnError">if set to <c>true</c> a exception will be thrown on an error.</param>
|
|
/// <returns>
|
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/// The references found. Null if an error occurred.
|
|
/// </returns>
|
|
public static ReferenceDescriptionCollection Browse(Session session, BrowseDescription nodeToBrowse, bool throwOnError)
|
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{
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try
|
|
{
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ReferenceDescriptionCollection references = new ReferenceDescriptionCollection();
|
|
|
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// construct browse request.
|
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BrowseDescriptionCollection nodesToBrowse = new BrowseDescriptionCollection();
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nodesToBrowse.Add(nodeToBrowse);
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// start the browse operation.
|
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BrowseResultCollection results = null;
|
|
DiagnosticInfoCollection diagnosticInfos = null;
|
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session.Browse(
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null,
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null,
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0,
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nodesToBrowse,
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out results,
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out diagnosticInfos);
|
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ClientBase.ValidateResponse(results, nodesToBrowse);
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ClientBase.ValidateDiagnosticInfos(diagnosticInfos, nodesToBrowse);
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do
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{
|
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// check for error.
|
|
if (StatusCode.IsBad(results[0].StatusCode))
|
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{
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throw new ServiceResultException(results[0].StatusCode);
|
|
}
|
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|
|
// process results.
|
|
for (int ii = 0; ii < results[0].References.Count; ii++)
|
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{
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references.Add(results[0].References[ii]);
|
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}
|
|
|
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// check if all references have been fetched.
|
|
if (results[0].References.Count == 0 || results[0].ContinuationPoint == null)
|
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{
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break;
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}
|
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|
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// continue browse operation.
|
|
ByteStringCollection continuationPoints = new ByteStringCollection();
|
|
continuationPoints.Add(results[0].ContinuationPoint);
|
|
|
|
session.BrowseNext(
|
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null,
|
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false,
|
|
continuationPoints,
|
|
out results,
|
|
out diagnosticInfos);
|
|
|
|
ClientBase.ValidateResponse(results, continuationPoints);
|
|
ClientBase.ValidateDiagnosticInfos(diagnosticInfos, continuationPoints);
|
|
}
|
|
while (true);
|
|
|
|
//return complete list.
|
|
return references;
|
|
}
|
|
catch (Exception exception)
|
|
{
|
|
if (throwOnError)
|
|
{
|
|
throw new ServiceResultException(exception, StatusCodes.BadUnexpectedError);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Browses the address space and returns all of the supertypes of the specified type node.
|
|
/// </summary>
|
|
/// <param name="session">The session.</param>
|
|
/// <param name="typeId">The NodeId for a type node in the address space.</param>
|
|
/// <param name="throwOnError">if set to <c>true</c> a exception will be thrown on an error.</param>
|
|
/// <returns>
|
|
/// The references found. Null if an error occurred.
|
|
/// </returns>
|
|
public static ReferenceDescriptionCollection BrowseSuperTypes(Session session, NodeId typeId, bool throwOnError)
|
|
{
|
|
ReferenceDescriptionCollection supertypes = new ReferenceDescriptionCollection();
|
|
|
|
try
|
|
{
|
|
// find all of the children of the field.
|
|
BrowseDescription nodeToBrowse = new BrowseDescription();
|
|
|
|
nodeToBrowse.NodeId = typeId;
|
|
nodeToBrowse.BrowseDirection = BrowseDirection.Inverse;
|
|
nodeToBrowse.ReferenceTypeId = ReferenceTypeIds.HasSubtype;
|
|
nodeToBrowse.IncludeSubtypes = false; // more efficient to use IncludeSubtypes=False when possible.
|
|
nodeToBrowse.NodeClassMask = 0; // the HasSubtype reference already restricts the targets to Types.
|
|
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
|
|
|
|
ReferenceDescriptionCollection references = Browse(session, nodeToBrowse, throwOnError);
|
|
|
|
while (references != null && references.Count > 0)
|
|
{
|
|
// should never be more than one supertype.
|
|
supertypes.Add(references[0]);
|
|
|
|
// only follow references within this server.
|
|
if (references[0].NodeId.IsAbsolute)
|
|
{
|
|
break;
|
|
}
|
|
|
|
// get the references for the next level up.
|
|
nodeToBrowse.NodeId = (NodeId)references[0].NodeId;
|
|
references = Browse(session, nodeToBrowse, throwOnError);
|
|
}
|
|
|
|
// return complete list.
|
|
return supertypes;
|
|
}
|
|
catch (Exception exception)
|
|
{
|
|
if (throwOnError)
|
|
{
|
|
throw new ServiceResultException(exception, StatusCodes.BadUnexpectedError);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Constructs an event object from a notification.
|
|
/// </summary>
|
|
/// <param name="session">The session.</param>
|
|
/// <param name="monitoredItem">The monitored item that produced the notification.</param>
|
|
/// <param name="notification">The notification.</param>
|
|
/// <param name="knownEventTypes">The known event types.</param>
|
|
/// <param name="eventTypeMappings">Mapping between event types and known event types.</param>
|
|
/// <returns>
|
|
/// The event object. Null if the notification is not a valid event type.
|
|
/// </returns>
|
|
public static BaseEventState ConstructEvent(
|
|
Session session,
|
|
MonitoredItem monitoredItem,
|
|
EventFieldList notification,
|
|
Dictionary<NodeId, Type> knownEventTypes,
|
|
Dictionary<NodeId, NodeId> eventTypeMappings)
|
|
{
|
|
// find the event type.
|
|
NodeId eventTypeId = FindEventType(monitoredItem, notification);
|
|
|
|
if (eventTypeId == null)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
// look up the known event type.
|
|
Type knownType = null;
|
|
NodeId knownTypeId = null;
|
|
|
|
if (eventTypeMappings.TryGetValue(eventTypeId, out knownTypeId))
|
|
{
|
|
knownType = knownEventTypes[knownTypeId];
|
|
}
|
|
|
|
// try again.
|
|
if (knownType == null)
|
|
{
|
|
if (knownEventTypes.TryGetValue(eventTypeId, out knownType))
|
|
{
|
|
knownTypeId = eventTypeId;
|
|
eventTypeMappings.Add(eventTypeId, eventTypeId);
|
|
}
|
|
}
|
|
|
|
// try mapping it to a known type.
|
|
if (knownType == null)
|
|
{
|
|
// browse for the supertypes of the event type.
|
|
ReferenceDescriptionCollection supertypes = FormUtils.BrowseSuperTypes(session, eventTypeId, false);
|
|
|
|
// can't do anything with unknown types.
|
|
if (supertypes == null)
|
|
{
|
|
return null;
|
|
}
|
|
|
|
// find the first supertype that matches a known event type.
|
|
for (int ii = 0; ii < supertypes.Count; ii++)
|
|
{
|
|
NodeId superTypeId = (NodeId)supertypes[ii].NodeId;
|
|
|
|
if (knownEventTypes.TryGetValue(superTypeId, out knownType))
|
|
{
|
|
knownTypeId = superTypeId;
|
|
eventTypeMappings.Add(eventTypeId, superTypeId);
|
|
}
|
|
|
|
if (knownTypeId != null)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
|
|
// can't do anything with unknown types.
|
|
if (knownTypeId == null)
|
|
{
|
|
return null;
|
|
}
|
|
}
|
|
|
|
// construct the event based on the known event type.
|
|
BaseEventState e = (BaseEventState)Activator.CreateInstance(knownType, new object[] { (NodeState)null });
|
|
|
|
// get the filter which defines the contents of the notification.
|
|
EventFilter filter = monitoredItem.Status.Filter as EventFilter;
|
|
|
|
// initialize the event with the values in the notification.
|
|
e.Update(session.SystemContext, filter.SelectClauses, notification);
|
|
|
|
// save the orginal notification.
|
|
e.Handle = notification;
|
|
|
|
return e;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Returns the node ids for a set of relative paths.
|
|
/// </summary>
|
|
/// <param name="session">An open session with the server to use.</param>
|
|
/// <param name="startNodeId">The starting node for the relative paths.</param>
|
|
/// <param name="namespacesUris">The namespace URIs referenced by the relative paths.</param>
|
|
/// <param name="relativePaths">The relative paths.</param>
|
|
/// <returns>A collection of local nodes.</returns>
|
|
public static List<NodeId> TranslateBrowsePaths(
|
|
Session session,
|
|
NodeId startNodeId,
|
|
NamespaceTable namespacesUris,
|
|
params string[] relativePaths)
|
|
{
|
|
// build the list of browse paths to follow by parsing the relative paths.
|
|
BrowsePathCollection browsePaths = new BrowsePathCollection();
|
|
|
|
if (relativePaths != null)
|
|
{
|
|
for (int ii = 0; ii < relativePaths.Length; ii++)
|
|
{
|
|
BrowsePath browsePath = new BrowsePath();
|
|
|
|
// The relative paths used indexes in the namespacesUris table. These must be
|
|
// converted to indexes used by the server. An error occurs if the relative path
|
|
// refers to a namespaceUri that the server does not recognize.
|
|
|
|
// The relative paths may refer to ReferenceType by their BrowseName. The TypeTree object
|
|
// allows the parser to look up the server's NodeId for the ReferenceType.
|
|
|
|
browsePath.RelativePath = RelativePath.Parse(
|
|
relativePaths[ii],
|
|
session.TypeTree,
|
|
namespacesUris,
|
|
session.NamespaceUris);
|
|
|
|
browsePath.StartingNode = startNodeId;
|
|
|
|
browsePaths.Add(browsePath);
|
|
}
|
|
}
|
|
|
|
// make the call to the server.
|
|
BrowsePathResultCollection results;
|
|
DiagnosticInfoCollection diagnosticInfos;
|
|
|
|
ResponseHeader responseHeader = session.TranslateBrowsePathsToNodeIds(
|
|
null,
|
|
browsePaths,
|
|
out results,
|
|
out diagnosticInfos);
|
|
|
|
// ensure that the server returned valid results.
|
|
Session.ValidateResponse(results, browsePaths);
|
|
Session.ValidateDiagnosticInfos(diagnosticInfos, browsePaths);
|
|
|
|
// collect the list of node ids found.
|
|
List<NodeId> nodes = new List<NodeId>();
|
|
|
|
for (int ii = 0; ii < results.Count; ii++)
|
|
{
|
|
// check if the start node actually exists.
|
|
if (StatusCode.IsBad(results[ii].StatusCode))
|
|
{
|
|
nodes.Add(null);
|
|
continue;
|
|
}
|
|
|
|
// an empty list is returned if no node was found.
|
|
if (results[ii].Targets.Count == 0)
|
|
{
|
|
nodes.Add(null);
|
|
continue;
|
|
}
|
|
|
|
// Multiple matches are possible, however, the node that matches the type model is the
|
|
// one we are interested in here. The rest can be ignored.
|
|
BrowsePathTarget target = results[ii].Targets[0];
|
|
|
|
if (target.RemainingPathIndex != UInt32.MaxValue)
|
|
{
|
|
nodes.Add(null);
|
|
continue;
|
|
}
|
|
|
|
// The targetId is an ExpandedNodeId because it could be node in another server.
|
|
// The ToNodeId function is used to convert a local NodeId stored in a ExpandedNodeId to a NodeId.
|
|
nodes.Add(ExpandedNodeId.ToNodeId(target.TargetId, session.NamespaceUris));
|
|
}
|
|
|
|
// return whatever was found.
|
|
return nodes;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Collects the fields for the type.
|
|
/// </summary>
|
|
/// <param name="session">The session.</param>
|
|
/// <param name="fields">The fields.</param>
|
|
/// <param name="fieldNodeIds">The node id for the declaration of the field.</param>
|
|
public static void CollectFieldsForType(Session session, NodeId typeId, SimpleAttributeOperandCollection fields, List<NodeId> fieldNodeIds)
|
|
{
|
|
// get the supertypes.
|
|
ReferenceDescriptionCollection supertypes = FormUtils.BrowseSuperTypes(session, typeId, false);
|
|
|
|
if (supertypes == null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
// process the types starting from the top of the tree.
|
|
Dictionary<NodeId, QualifiedNameCollection> foundNodes = new Dictionary<NodeId, QualifiedNameCollection>();
|
|
QualifiedNameCollection parentPath = new QualifiedNameCollection();
|
|
|
|
for (int ii = supertypes.Count - 1; ii >= 0; ii--)
|
|
{
|
|
CollectFields(session, (NodeId)supertypes[ii].NodeId, parentPath, fields, fieldNodeIds, foundNodes);
|
|
}
|
|
|
|
// collect the fields for the selected type.
|
|
CollectFields(session, typeId, parentPath, fields, fieldNodeIds, foundNodes);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Collects the fields for the instance.
|
|
/// </summary>
|
|
/// <param name="session">The session.</param>
|
|
/// <param name="fields">The fields.</param>
|
|
/// <param name="instanceId">The node id for the declaration of the field.</param>
|
|
public static void CollectFieldsForInstance(Session session, NodeId instanceId, SimpleAttributeOperandCollection fields, List<NodeId> fieldNodeIds)
|
|
{
|
|
Dictionary<NodeId, QualifiedNameCollection> foundNodes = new Dictionary<NodeId, QualifiedNameCollection>();
|
|
QualifiedNameCollection parentPath = new QualifiedNameCollection();
|
|
CollectFields(session, instanceId, parentPath, fields, fieldNodeIds, foundNodes);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Collects the fields for the instance node.
|
|
/// </summary>
|
|
/// <param name="session">The session.</param>
|
|
/// <param name="nodeId">The node id.</param>
|
|
/// <param name="parentPath">The parent path.</param>
|
|
/// <param name="fields">The event fields.</param>
|
|
/// <param name="fieldNodeIds">The node id for the declaration of the field.</param>
|
|
/// <param name="foundNodes">The table of found nodes.</param>
|
|
private static void CollectFields(
|
|
Session session,
|
|
NodeId nodeId,
|
|
QualifiedNameCollection parentPath,
|
|
SimpleAttributeOperandCollection fields,
|
|
List<NodeId> fieldNodeIds,
|
|
Dictionary<NodeId, QualifiedNameCollection> foundNodes)
|
|
{
|
|
// find all of the children of the field.
|
|
BrowseDescription nodeToBrowse = new BrowseDescription();
|
|
|
|
nodeToBrowse.NodeId = nodeId;
|
|
nodeToBrowse.BrowseDirection = BrowseDirection.Forward;
|
|
nodeToBrowse.ReferenceTypeId = ReferenceTypeIds.Aggregates;
|
|
nodeToBrowse.IncludeSubtypes = true;
|
|
nodeToBrowse.NodeClassMask = (uint)(NodeClass.Object | NodeClass.Variable);
|
|
nodeToBrowse.ResultMask = (uint)BrowseResultMask.All;
|
|
|
|
ReferenceDescriptionCollection children = FormUtils.Browse(session, nodeToBrowse, false);
|
|
|
|
if (children == null)
|
|
{
|
|
return;
|
|
}
|
|
|
|
// process the children.
|
|
for (int ii = 0; ii < children.Count; ii++)
|
|
{
|
|
ReferenceDescription child = children[ii];
|
|
|
|
if (child.NodeId.IsAbsolute)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
// construct browse path.
|
|
QualifiedNameCollection browsePath = new QualifiedNameCollection(parentPath);
|
|
browsePath.Add(child.BrowseName);
|
|
|
|
// check if the browse path is already in the list.
|
|
int index = ContainsPath(fields, browsePath);
|
|
|
|
if (index < 0)
|
|
{
|
|
SimpleAttributeOperand field = new SimpleAttributeOperand();
|
|
|
|
field.TypeDefinitionId = ObjectTypeIds.BaseEventType;
|
|
field.BrowsePath = browsePath;
|
|
field.AttributeId = (child.NodeClass == NodeClass.Variable) ? Attributes.Value : Attributes.NodeId;
|
|
|
|
fields.Add(field);
|
|
fieldNodeIds.Add((NodeId)child.NodeId);
|
|
}
|
|
|
|
// recusively find all of the children.
|
|
NodeId targetId = (NodeId)child.NodeId;
|
|
|
|
// need to guard against loops.
|
|
if (!foundNodes.ContainsKey(targetId))
|
|
{
|
|
foundNodes.Add(targetId, browsePath);
|
|
CollectFields(session, (NodeId)child.NodeId, browsePath, fields, fieldNodeIds, foundNodes);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Determines whether the specified select clause contains the browse path.
|
|
/// </summary>
|
|
/// <param name="selectClause">The select clause.</param>
|
|
/// <param name="browsePath">The browse path.</param>
|
|
/// <returns>
|
|
/// <c>true</c> if the specified select clause contains path; otherwise, <c>false</c>.
|
|
/// </returns>
|
|
private static int ContainsPath(SimpleAttributeOperandCollection selectClause, QualifiedNameCollection browsePath)
|
|
{
|
|
for (int ii = 0; ii < selectClause.Count; ii++)
|
|
{
|
|
SimpleAttributeOperand field = selectClause[ii];
|
|
|
|
if (field.BrowsePath.Count != browsePath.Count)
|
|
{
|
|
continue;
|
|
}
|
|
|
|
bool match = true;
|
|
|
|
for (int jj = 0; jj < field.BrowsePath.Count; jj++)
|
|
{
|
|
if (field.BrowsePath[jj] != browsePath[jj])
|
|
{
|
|
match = false;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (match)
|
|
{
|
|
return ii;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
}
|
|
}
|