我可以在C#中设置UdpClient的超时时间吗？

Question

我想知道我是否可以为UdpClient接收方法设置超时值.

我想使用块模式,但因为有时udp会丢失数据包,我的程序udpClient.receive将永远挂在那里.

我有什么好主意可以管理它？

Answer 1

有一个SendTimeout和一个ReceiveTimeout属性,你可以使用Socket的UdpClient.

以下是5秒超时的示例:

var udpClient = new UdpClient();

udpClient.Client.SendTimeout = 5000;
udpClient.Client.ReceiveTimeout = 5000;

...

Answer 2

Filip所指的是嵌套在UdpClient包含(UdpClient.Client.ReceiveTimeout)的套接字中.

您也可以使用异步方法执行此操作,但手动阻止执行:

var timeToWait = TimeSpan.FromSeconds(10);

var udpClient = new UdpClient( portNumber );
var asyncResult = udpClient.BeginReceive( null, null );
asyncResult.AsyncWaitHandle.WaitOne( timeToWait );
if (asyncResult.IsCompleted)
{
    try
    {
        IPEndPoint remoteEP = null;
        byte[] receivedData = udpClient.EndReceive( asyncResult, ref remoteEP );
        // EndReceive worked and we have received data and remote endpoint
    }
    catch (Exception ex)
    {
        // EndReceive failed and we ended up here
    }
} 
else
{
    // The operation wasn't completed before the timeout and we're off the hook
}