C# TcpClient - 客户端确定远程服务器是否正常关闭连接的最佳方法是什么？

Question

I know there are various suggested ways to achieve this, using Poll/Available/Send, etc., but none of them seem to work for me. I have a connection to a remote server, which the remote server gracefully disconnects after a specific message. I need to ensure I don't disconnect from the remote server myself, and wait for the server to shutdown connection before I can safely reconnect and send other follow-up messages.

I'm using the ReadAsync method on Stream to get responses from that connection, as below:

while (await TcpClientObject.GetStream().ReadAsync(bufferData, 0, bufferData.Length) > 0)
{
     //My logic here to handle responses
}

What's the most recommended approach for me to verify that the remote server has gracefully shutdown the connection before attempting a reconnect? Thanks.

Answer 1

If everything goes well ReadAsync will return 0 when the server closes the connection.

An exception is thrown if your side detects an abnormal disconnection, but in the worst case your end still thinks it's connected and ReadAsync won't return.