C#和西门子PLC1200 以太网通讯

C#和西门子PLC以太网通讯，上位机代码

using System;
using System.Data;
using System.Configuration;
using System.Data.OleDb;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ClientTest
{
    /// 

    /// AccessHelper 的摘要说明
    /// 

    class AccessHelper
    {
        #region 变量
        public  OleDbConnection conn = new OleDbConnection（）;
        public  OleDbCommand comm = new OleDbCommand（）;
        public  string connectionString = @““;
        #endregion

        #region 构造函数
        /// 

        /// 构造函数
        /// 

        public AccessHelper（）
        {

        }
        #endregion

        #region 打开数据库
        /// 

        /// 打开数据库
        /// 

        private  void openConnection（）
        {
            if （conn.State == ConnectionState.Closed）
            {
                conn.ConnectionString = connectionString;
                comm.Connection = conn;
                try
                {
                    conn.Open（）;
                }
                catch （Exception ex）
                {
                    throw new Exception（ex.Message）;
                }
            }
        }
        #endregion

        #region 关闭数据库
        /// 

        /// 关闭数据库
        /// 

        private void closeConnection（）
        {
            if （conn.State == ConnectionState.Open）
            {
                conn.Close（）;
                conn.Dispose（）;
                comm.Dispose（）;
            }
        }
        #endregion

        #region 执行sql语句
        /// 

        /// 执行sql语句
        /// 

        public void ExecuteSql（string sqlstr）
        {
            try
            {
                openConnection（）;
                comm.CommandType = CommandType.Text;
                comm.CommandText = sqlstr;
                comm.ExecuteNonQuery（）;
            }
            catch （Exception ex）
            {
                throw new Exception（ex.Message）;
            }
            finally
            {
                closeConnection（）;
            }
        }
        #endregion

        #region 返回指定sql语句的OleDbDataReader对象使用时请注意关闭这个对象。
        /// 

        /// 返回指定sql语句的OleDbDataReader对象使用时请注意关闭这个对象。
        /// 

        public  OleDbDataReader DataReader（string sqlstrstring nconnectionStr）
        {
            OleDbDataReader dr = null;
            try
            {
                connectionString = nconnectionStr;
                openConnection（）;
                comm.CommandText = sqlstr;
                comm.CommandType = CommandType.Text;

                dr = comm.ExecuteReader（CommandBehavior.CloseConnection）;
            }
            catch
            {
                try
                {
                    dr.Close（）;
                    closeConnection（）;
                

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2017-04-13 15:35  suSocket2017_4_13\
     目录           0  2017-04-13 15:35  suSocket2017_4_13\ClientTest\
     文件        9525  2017-04-13 10:50  suSocket2017_4_13\ClientTest\AccessHelper.cs
     文件         189  2017-04-11 15:25  suSocket2017_4_13\ClientTest\App.config
     目录           0  2017-04-13 15:35  suSocket2017_4_13\ClientTest\bin\
     目录           0  2017-04-13 15:35  suSocket2017_4_13\ClientTest\bin\Debug\
     文件       23040  2017-04-13 15:20  suSocket2017_4_13\ClientTest\bin\Debug\ClientTest.exe
     文件         189  2017-04-11 15:25  suSocket2017_4_13\ClientTest\bin\Debug\ClientTest.exe.config
     文件       36352  2017-04-13 15:20  suSocket2017_4_13\ClientTest\bin\Debug\ClientTest.pdb
     文件       22696  2017-04-12 17:10  suSocket2017_4_13\ClientTest\bin\Debug\ClientTest.vshost.exe
     文件         189  2017-04-11 15:25  suSocket2017_4_13\ClientTest\bin\Debug\ClientTest.vshost.exe.config
     文件         490  2016-07-16 19:44  suSocket2017_4_13\ClientTest\bin\Debug\ClientTest.vshost.exe.manifest
     文件     1253376  2017-04-13 15:23  suSocket2017_4_13\ClientTest\bin\Debug\CurceData.mdb
     文件       33280  2017-04-13 15:01  suSocket2017_4_13\ClientTest\bin\Debug\DynamicCurce.dll
     文件       58880  2017-04-13 15:01  suSocket2017_4_13\ClientTest\bin\Debug\DynamicCurce.pdb
     文件        6656  2017-04-13 15:15  suSocket2017_4_13\ClientTest\bin\Debug\SocketClient.dll
     文件       13824  2017-04-13 15:15  suSocket2017_4_13\ClientTest\bin\Debug\SocketClient.pdb
     文件      253952  2017-04-13 09:45  suSocket2017_4_13\ClientTest\bin\Debug\员工信息.mdb
     目录           0  2017-04-13 10:00  suSocket2017_4_13\ClientTest\bin\Release\
     文件        4544  2017-04-13 14:41  suSocket2017_4_13\ClientTest\ClientTest.csproj
     目录           0  2017-04-13 15:35  suSocket2017_4_13\ClientTest\obj\
     目录           0  2017-04-13 15:35  suSocket2017_4_13\ClientTest\obj\Debug\
     文件        3472  2017-04-13 15:20  suSocket2017_4_13\ClientTest\obj\Debug\ClientTest.csproj.FileListAbsolute.txt
     文件        1017  2017-04-13 15:20  suSocket2017_4_13\ClientTest\obj\Debug\ClientTest.csproj.GenerateResource.Cache
     文件       10533  2017-04-13 15:20  suSocket2017_4_13\ClientTest\obj\Debug\ClientTest.csprojResolveAssemblyReference.cache
     文件       23040  2017-04-13 15:20  suSocket2017_4_13\ClientTest\obj\Debug\ClientTest.exe
     文件       36352  2017-04-13 15:20  suSocket2017_4_13\ClientTest\obj\Debug\ClientTest.pdb
     文件        1942  2017-04-13 15:20  suSocket2017_4_13\ClientTest\obj\Debug\ClientTest.plcSocketTest.resources
     文件         180  2017-04-13 15:20  suSocket2017_4_13\ClientTest\obj\Debug\ClientTest.Properties.Resources.resources
     文件        1464  2017-04-12 11:16  suSocket2017_4_13\ClientTest\obj\Debug\DesignTimeResolveAssemblyReferences.cache
     文件        7270  2017-04-13 15:01  suSocket2017_4_13\ClientTest\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
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