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WebException Constructor (String)

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

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

Try 
           ' A 'Socket' object has been created. 
           Dim httpSocket As New Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp)

           ' The IPaddress of the unknown uri is resolved using the 'Dns.Resolve' method.  
	         
           Dim hostEntry As IPHostEntry = Dns.Resolve(connectUri)

           Dim serverAddress As IPAddress = hostEntry.AddressList(0)
           Dim endPoint As New IPEndPoint(serverAddress, 80)
           httpSocket.Connect(endPoint)
           Console.WriteLine("Connection created successfully")
           httpSocket.Close()
       Catch e As SocketException
           Console.WriteLine((ControlChars.Cr + "Exception thrown." + ControlChars.Cr + "The Original Message is: " + e.Message))
           ' Throw the 'WebException' object with a message string specific to the situation. 
           Throw New WebException("Unable to locate the Server with 'www.contoso.com' Uri.")
       End Try

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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