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using System.Collections; |
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using System.Collections.Generic; |
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using System.Net; |
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using System.Net.Sockets; |
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using System; |
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using System.Text; |
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namespace YX |
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{ |
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//规范命名、添加注释、合理封装、限制访问权限 |
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public class AsyncTcpClient |
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{ |
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private string ip1; |
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private int port1; |
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byte[] ReadBytes = new byte[1024]; |
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//单例 |
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TcpClient tcpClient; |
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//连接服务器 |
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public void ConnectServer(string ip, int port) |
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{ |
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//防止多个事例去重复连接 |
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if (isTryingToCon == true) |
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{ |
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return; |
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} |
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ip1 = ip; |
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port1 = port; |
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try |
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{ |
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if (tcpClient != null) |
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{ |
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tcpClient.Close(); |
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} |
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tcpClient = new TcpClient(); |
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isTryingToCon = true; |
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//开始异步 |
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tcpClient.BeginConnect(IPAddress.Parse(ip), port, Lianjie, null); |
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} |
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catch (Exception e) |
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{ |
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} |
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} |
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private bool isTryingToCon = false; |
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//连接判断 |
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void Lianjie(IAsyncResult ar) |
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{ |
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if (IsClose) |
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{ |
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return; |
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} |
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if (tcpClient.Connected == false) |
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{ |
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SetCon(0); |
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tcpClient.Close(); |
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tcpClient = new System.Net.Sockets.TcpClient(); |
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//尝试重连。。。。。。; |
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tcpClient.BeginConnect(IPAddress.Parse(ip1), port1, Lianjie, null); |
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} |
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else |
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{ |
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//连接上了 |
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isTryingToCon = false; |
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//结束异步连接 |
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tcpClient.EndConnect(ar); |
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//读取数据 |
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tcpClient.GetStream().BeginRead(ReadBytes, 0, ReadBytes.Length, ReceiveCallBack, null); |
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SetCon(1); |
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} |
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} |
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//接收消息 |
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void ReceiveCallBack(IAsyncResult ar) |
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{ |
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try |
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{ |
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int len = tcpClient.GetStream().EndRead(ar);//结束异步读取 |
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if (len > 0) |
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{ |
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MyEventArgs e = new MyEventArgs(ip1, ReadBytes); |
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_MsgChange(e); |
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//重置数据,防止旧数据残留 |
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ReadBytes = new byte[1024]; |
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tcpClient.GetStream().BeginRead(ReadBytes, 0, ReadBytes.Length, ReceiveCallBack, null); |
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} |
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else |
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{ |
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//尝试重连。。。。。。" |
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ConnectServer(ip1, port1); |
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} |
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} |
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catch (Exception e) |
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{ |
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} |
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} |
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//发送消息 |
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public bool SendMsg(string msg) |
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{ |
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try |
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{ |
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//开始异步发送 |
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byte[] msgBytes = Encoding.UTF8.GetBytes(msg); |
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tcpClient.GetStream().BeginWrite(msgBytes, 0, msgBytes.Length, (ar) => |
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{ |
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tcpClient.GetStream().EndWrite(ar);//结束异步发送 |
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}, null); |
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return true; |
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} |
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catch (Exception ex) |
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{ |
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// int a = ex.NativeErrorCode; |
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//尝试重连。。。。。。" |
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ConnectServer(ip1, port1); |
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return false; |
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} |
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} |
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public bool SendMsg(byte[] msg) |
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{ |
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try |
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{ |
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//开始异步发送 |
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tcpClient.GetStream().BeginWrite(msg, 0, msg.Length, (ar) => |
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{ |
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tcpClient.GetStream().EndWrite(ar);//结束异步发送 |
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}, null); |
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return true; |
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} |
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catch (Exception ex) |
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{ |
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//尝试重连。。。。。。" |
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ConnectServer(ip1, port1); |
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return false; |
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} |
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} |
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bool IsClose = false; |
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/// <summary> |
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/// 断开连接 |
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/// </summary> |
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public void Close() |
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{ |
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IsClose = true; |
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if (tcpClient != null && tcpClient.Client.Connected) |
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{ |
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tcpClient.Close(); |
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} |
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if (!tcpClient.Client.Connected) |
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{ |
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tcpClient.Close();//断开挂起的异步连接 |
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} |
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} |
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int isConnected = -1; |
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/// <summary> |
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/// -1 初始化 0 未连接 1 连接 |
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/// </summary> |
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/// <param name="_con"></param> |
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private void SetCon(int _con) |
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{ |
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if (isConnected != _con) |
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{ |
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bool rel = false; |
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if (_con == 1) |
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{ |
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rel = true; |
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} |
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isConnected = _con; |
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MyEventArgs e = new MyEventArgs(ip1, rel); |
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_ConChange(e); |
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} |
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} |
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public class MyEventArgs : EventArgs |
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{ |
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public string IP; |
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public bool IsConnetct; |
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public byte[] Msg; |
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public MyEventArgs(string iP, byte[] msg) |
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{ |
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IP = iP; |
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Msg = msg; |
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} |
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public MyEventArgs(string iP, bool iscon) |
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{ |
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IP = iP; |
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IsConnetct = iscon; |
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} |
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} |
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//连接状态 |
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public delegate void ConChange(object sender, MyEventArgs args); |
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public event ConChange OnConChange; |
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protected virtual void _ConChange(MyEventArgs e) |
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{ |
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if (OnConChange != null) |
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{ |
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OnConChange(this, e); |
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} |
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} |
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//收到的消息 |
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public delegate void MsgChange(object sender, MyEventArgs args); |
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public event MsgChange OnMsgChange; |
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protected virtual void _MsgChange(MyEventArgs e) |
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{ |
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if (OnMsgChange != null) |
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{ |
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OnMsgChange(this, e); |
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} |
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} |
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} |
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} |
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//调用方法 |
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//AsyncTcpClient sw = new AsyncTcpClient(); |
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//private void Form1_Load(object sender, EventArgs e) |
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//{ |
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// sw.ConnectServer("192.168.1.19", 8000); |
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// sw.OnConChange += Sw_OnConChange; |
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// sw.OnMsgChange += Sw_OnMsgChange; |
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//} |
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//private void Sw_OnMsgChange(object sender, AsyncTcpClient.MyEventArgs args) |
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//{ |
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// string str = Encoding.UTF8.GetString(args.Msg, 0, args.Msg.Length); |
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// str = Uri.UnescapeDataString(str); |
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// Invoke(new MethodInvoker(delegate () |
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// { |
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// label2.Text = args.IP + "___" + str; |
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// })); |
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//} |
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//private void Sw_OnConChange(object sender, AsyncTcpClient.MyEventArgs args) |
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//{ |
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// Invoke(new MethodInvoker(delegate () |
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// { |
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// label1.Text = args.IP + "___" + args.IsConnetct.ToString(); |
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// })); |
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//} |
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//private void button1_Click(object sender, EventArgs e) |
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//{ |
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// bool rel = sw.SendMsg("asdf"); |
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// button1.Text = rel.ToString(); |
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//} |
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//private void Form1_FormClosing(object sender, FormClosingEventArgs e) |
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//{ |
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// sw.OnConChange -= Sw_OnConChange; |
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// sw.OnMsgChange -= Sw_OnMsgChange; |
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// sw.Close(); |
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//} |