[轉]c# winform tcp connect timeout 鏈接超時設置

轉自:https://www.cnblogs.com/jhlong/p/5622336.html

簡單的c# TCP通信（TcpListener）

C# 的TCP Socket （同步方式）

C# 的TCP Socket （異步方式）

C# 的tcp Socket設置自定義超時時間

C# TCP socket發送大數據包時，接收端和發送端數據不一致 服務端接收Receive不徹底

 

 

tcp Socket的超時時間默認20多秒，而實際連上不需1秒時間，20多秒是沒法接受的。

private delegate string ConnectSocketDelegate(IPEndPoint ipep, Socket sock);
private string ConnectSocket(IPEndPoint ipep, Socket sock)
{
string exmessage = "";
try
{
sock.Connect(ipep);
}
catch (System.Exception ex)
{
exmessage = ex.Message;
}
finally
{
}

return exmessage;
}
private void button5_Click_1(object sender, EventArgs e)
{

IPEndPoint ipep = new IPEndPoint(IPAddress.Parse("192.168.18.165"), 9961);//IP和端口
Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

ConnectSocketDelegate connect = ConnectSocket;
IAsyncResult asyncResult = connect.BeginInvoke(ipep, sock, null, null);

bool connectSuccess = asyncResult.AsyncWaitHandle.WaitOne(2000, false); //2秒後結束
if (!connectSuccess)
{
MessageBox.Show(string.Format("失敗！錯誤信息：{0}", "鏈接超時"));//2秒後彈出

}

string exmessage = connect.EndInvoke(asyncResult); //此處仍然會卡住20多秒,可註釋掉
if (!string.IsNullOrEmpty(exmessage))
{
MessageBox.Show(string.Format("失敗！錯誤信息：{0}", exmessage));

}

}