C # TCPListener,

C # TCPListener,

1: There are two areas where exception handling is required. The exception type is IOException.

When the server reads the information from the client:

LeafTCPClient client = (LeafTCPClient) ar. AsyncState;
Try
{

If (client. NetWork. Connected)
{
NetworkStream ns = client. NetWork. GetStream ();
Byte [] recdata = new byte [ns. EndRead (ar)]; // when a remote exception is disabled, an IOException occurs after this sentence is executed.

......

}

Catch (IOException ex)

{

MessageBox. Show (ex. Message, "Error", MessageBoxButtons. OK, MessageBoxIcon. Error );

}

When the remote client is abnormally disconnected (such as power-off), the server is reading the information sent from the client. If no exception is handled

When the server writes data to the client, if the client is disconnected unexpectedly