c# - Web异常: Unable to connect to the remote server

Question

我有一个客户端应用程序，它使用 WebHttpRequest 从外部服务器获取响应，它工作正常，但有时我会遇到以下异常......

System.Net.WebException: Unable to connect to the remote server ---> System.Net.Sockets.SocketException: A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond xx.xx.xxx.xxx:xxx at System.Net.Sockets.Socket.DoConnect(EndPoint endPointSnapshot, SocketAddress socketAddress) at System.Net.Sockets.Socket.InternalConnect(EndPoint remoteEP) at System.Net.ServicePoint.ConnectSocketInternal(Boolean connectFailure, Socket s4, Socket s6, Socket& socket, IPAddress& address, ConnectSocketState state, IAsyncResult asyncResult, Int32 timeout, Exception& exception) --- End of inner exception stack trace ---

at System.Net.HttpWebRequest.GetRequestStream(TransportContext& context)

at System.Net.HttpWebRequest.GetRequestStream()

...有什么帮助吗？

Answer 1

这更像是“请求超时”错误。您尝试连接的服务器未响应您的请求。您应该使用 try-catch 处理此异常，并在 catch block 中再次尝试连接 n 次。