WebException Constructor (String, Exception)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Initializes a new instance of the WebException class with the specified error message and nested exception.
Assembly: System.Net (in System.Net.dll)
Parameters
- message
- Type: System.String
The text of the error message.
- innerException
- Type: System.Exception
A nested exception.
The WebException instance is initialized with the Message property set to the value of message and the InnerException property set to the value of innerException. If message is Nothing, the Message property is initialized to a system-supplied message. The InnerException and Response properties are initialized to Nothing. The Status property is initialized to RequestCanceled.
The following example throws a WebException by specifying an error message and nested exception.
public class Example { static ManualResetEvent clientDone = new ManualResetEvent(false); public static void Demo(System.Windows.Controls.TextBlock outputBlock) { SocketAsyncEventArgs socketEventArg = new SocketAsyncEventArgs(); DnsEndPoint hostEntry = new DnsEndPoint("http://www.contoso.com", 80); // Create a socket and connect to the server Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); socketEventArg.Completed += new EventHandler<SocketAsyncEventArgs>(SocketEventArg_Completed); socketEventArg.RemoteEndPoint = hostEntry; socketEventArg.UserToken = sock; sock.ConnectAsync(socketEventArg); clientDone.WaitOne(); } static void SocketEventArg_Completed(object sender, SocketAsyncEventArgs e) { if (e.LastOperation == SocketAsyncOperation.Connect) { if (e.SocketError == SocketError.Success) { // Successfully connected to the server } else { // Throw the WebException with a string throw new WebException("Unable to connect to 'www.contoso.com' Uri.",new SocketException()); } } // socket operation not a connect! else throw new Exception("Invalid operation completed"); } }