using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace TcpDemo
{
class TcpClient
{
private string _ipAddress;
private int _endPoint;
/// <summary>
/// 构造函数
/// </summary>
/// <param name="ipAddress"></param>
/// <param name="endPoint"></param>
public TcpClient(string ipAddress,int endPoint)
{
_ipAddress = ipAddress;
_endPoint = endPoint;
_mySocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
}
/// <summary>
/// 连接
/// </summary>
public void StartConnect()
{
try
{
_mySocket.Connect(_ipAddress, _endPoint); //连接服务端
_mySocket.BeginReceive(_receiveBuffer, 0, 4096, SocketFlags.None, ReceiveCallBack, _mySocket); //接收信息的回调绑定
ConnectedSuccess?.Invoke(1, new EventArgs()); //通知已成功连接的事件
}
catch
{
// ignored
ConnectedSuccess?.Invoke(0, new EventArgs()); //通知未连接的事件
}
}
private byte[] _receiveBuffer = new byte[4096];
private Socket _mySocket;
//接收消息的回调函数
private void ReceiveCallBack(IAsyncResult ar)
{
int count = _mySocket.EndReceive(ar); //接收到信息的长度
if (count == 0) //无法收到信息
{
ConnectedSuccess?.Invoke(0, new EventArgs());
_mySocket?.Close(); //关闭连接
return;
}
string msgReceive = Encoding.UTF8.GetString(_receiveBuffer, 0, count); //收到的信息转字符串
//也可以是对收到信息的解析(请使用状态机,参见其他示例)
ReciveMessage?.Invoke(new object(), new MyEventArgs(msgReceive, _receiveBuffer)); //通知已收到信息的事件
_mySocket.BeginReceive(_receiveBuffer, 0, 4096, SocketFlags.None, ReceiveCallBack, _mySocket); //重新执行回调绑定
}
/// <summary>
/// 发送消息
/// </summary>
/// <param name="sendString">消息字符串,也可以改为字节数组</param>
public void SendMessage(string sendString)
{
var outputBuffer = Encoding.UTF8.GetBytes(sendString);
try
{
_mySocket.Send(outputBuffer);
}
catch (Exception e)
{
ConnectedSuccess?.Invoke(0, new EventArgs());
}
}
//收到消息的事件
public event EventHandler<MyEventArgs> ReciveMessage;
//收到消息事件传输的事件参数
public class MyEventArgs : EventArgs
{
public string Message;
public byte[] RecBytes;
public MyEventArgs(string inputM, byte[] inputR)
{
Message = inputM;
RecBytes = inputR;
}
}
//连接成功的事件
public event EventHandler ConnectedSuccess;
}
}
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