WebException Constructor (String)

Initializes a new instance of the WebException class with the specified error message.

Namespace:  System.Net
Assembly:  System.Net (in System.Net.dll)

'Declaration
Public Sub New ( _
	message As String _
)

Parameters

message
Type: System.String
The text of the error message.

The WebException instance is initialized with the Message property set to the value of message. 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.


  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 no parameters.
		            throw new WebException("Unable to locate the Server with 'www.contoso.com' Uri.");
		        }
		     } 
		     // socket operation not a connect!  
         else
            throw new Exception("Invalid operation completed");
    }
  }


Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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