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大师兄法号随缘
2025-08-26 08:37:44 +08:00
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常用工具集/Utility/Network/S7netplus/ORM/S7Read.cs Normal file
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
namespace MES.Utility.Network.S7netplus.ORM
{
public class S7Read<T> where T : class, new()
{
private S7Client opcClient;
private Dictionary<string, PropertyInfo> fieldDict;
private Dictionary<string, int> stringLengthDict;
/// <summary>
/// 构造方法，传入参数
/// </summary>
/// <param name="opcClient"></param>
public S7Read(S7Client opcClient)
{
this.opcClient = opcClient;
//默认取出所有的只读或者可读可写的属性
GetNodeType(out fieldDict, out stringLengthDict);
}
/// <summary>
/// 获得所有具有可读属性的数据
/// </summary>
/// <returns></returns>
private void GetNodeType(out Dictionary<string, PropertyInfo> fieldDict, out Dictionary<string, int> stringLengthDict)
{
fieldDict = new Dictionary<string, PropertyInfo>();
stringLengthDict = new Dictionary<string, int>();
//获得对象T的属性
PropertyInfo[] properties = typeof(T).GetProperties();
//得到所有添加注解的属性
foreach (PropertyInfo info in properties)
{
//判断是否具有HttpController属性
Object[] attr = info.GetCustomAttributes(false);
if (attr.Length == 0)
{
continue;
}
//从注解数组中取第一个注解(一个属性可以包含多个注解)
S7PLCAttribute myattr = attr[0] as S7PLCAttribute;
if (myattr == null)
continue;
if (myattr.Type == S7NodeType.ReadAndWrite || myattr.Type == S7NodeType.ReadOnly)
{
fieldDict.Add(myattr.Address, info);
stringLengthDict.Add(myattr.Address, myattr.StrLength);
}
}
}
/// <summary>
/// 执行获得数据，映射成对象
/// </summary>
/// <param name="message">返回错误信息</param>
/// <returns></returns>
public bool Execute(out T t)
{
if (fieldDict.Count == 0)
{
t = default(T);
return false;
}
try
{
if (!opcClient.IsConnected)
{
t = default(T);
return false;
}
bool flag = false;
T entity = (T)Activator.CreateInstance(typeof(T));
//循环读取每一个
foreach (KeyValuePair<string, PropertyInfo> keyValue in fieldDict)
{
//判断当前keyValue是什么类型
if (keyValue.Value.PropertyType == typeof(ushort))
{
ushort value=0;
flag = opcClient.Plc.ReadInt16(keyValue.Key, out value);
if (!flag)
{
t = default(T);
return false;
}
keyValue.Value.SetValue(entity, value);
}
else if (keyValue.Value.PropertyType == typeof(int))
{
ushort value =0;
flag = opcClient.Plc.ReadInt16(keyValue.Key, out value);
if (!flag)
{
t = default(T);
return false;
}
keyValue.Value.SetValue(entity, value);
}
//else if (keyValue.Value.PropertyType == typeof(float))
//{
// float value;
// flag = opcClient.Plc.ReadReal(keyValue.Key, out value);
// if (!flag)
// {
// t = default(T);
// return false;
// }
// keyValue.Value.SetValue(entity, value);
//}
else if (keyValue.Value.PropertyType == typeof(string))
{
string value;
flag = opcClient.Plc.ReadString(keyValue.Key, stringLengthDict[keyValue.Key], out value);
if (!flag)
{
t = default(T);
return false;
}
keyValue.Value.SetValue(entity, value);
}
}
t = entity;
return true;
}
catch
{
t = default(T);
return false;
}
}
/// <summary>
/// 传入Lambda表达式，指定读取的数据
/// </summary>
/// <param name="columns"></param>
/// <returns></returns>
public S7Read<T> ReadField(Expression<Func<T, object>> columns)
{
Dictionary<string, PropertyInfo> fieldDict = new Dictionary<string, PropertyInfo>();
Dictionary<string, int> stringLengthDict = new Dictionary<string, int>();
//取出要读的属性
string lambda = columns.Body.ToString();
int index1 = lambda.IndexOf('(');
int index2 = lambda.IndexOf(')');
string str = lambda.Substring(index1 + 1, index2 - index1 - 1);
List<string> keyList = str.Split(',').Select(it => it.Split('=')[0].Trim()).ToList();
fieldDict.Clear();
//获得对象T的属性
PropertyInfo[] properties = typeof(T).GetProperties();
//得到所有添加注解的属性
foreach (PropertyInfo info in properties)
{
//判断是否具有HttpController属性
Object[] attr = info.GetCustomAttributes(false);
if (attr.Length == 0)
{
continue;
}
//从注解数组中取第一个注解(一个属性可以包含多个注解)
S7PLCAttribute myattr = attr[0] as S7PLCAttribute;
if (myattr == null)
continue;
if (myattr.Type == S7NodeType.ReadAndWrite || myattr.Type == S7NodeType.ReadOnly)
{
if (keyList.Contains(info.Name))
{
fieldDict.Add(myattr.Address, info);
stringLengthDict.Add(myattr.Address, myattr.StrLength);
}
}
}
this.fieldDict = fieldDict;
this.stringLengthDict = stringLengthDict;
return this;
}
}
}