WebException Constructor (String)
Initializes a new instance of the WebException class with the specified error message.
Assembly: System (in System.dll)
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
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.