HttpWebResponse.GetResponseHeader Method (String)

 

Gets the contents of a header that was returned with the response.

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

Public Function GetResponseHeader (
	headerName As String
) As String

Parameters

headerName
Type: System.String

The header value to return.

Return Value

Type: System.String

The contents of the specified header.

Exception Condition
ObjectDisposedException

The current instance has been disposed.

Use GetResponseHeader to retrieve the contents of particular headers. You must specify which header you want to return.

This example creates a Web request and queries for a response. If the site requires authentication, this example will respond with a challenge string. This string is extracted using GetResponseHeader.

   Public Shared Sub GetPage(url As [String])
Try
           Dim ourUri As New Uri(url)
           ' Creates an HttpWebRequest for the specified URL. 
           Dim myHttpWebRequest As HttpWebRequest = CType(WebRequest.Create(ourUri), HttpWebRequest)
           Dim myHttpWebResponse As HttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)
           Console.WriteLine(ControlChars.NewLine + "The server did not issue any challenge.  Please try again with a protected resource URL.")
           ' Releases the resources of the response.
           myHttpWebResponse.Close()
       Catch e As WebException
           Dim response As HttpWebResponse = CType(e.Response, HttpWebResponse)
           If Not (response Is Nothing) Then
               If response.StatusCode = HttpStatusCode.Unauthorized Then
                   Dim challenge As String = Nothing
                   challenge = response.GetResponseHeader("WWW-Authenticate")
                   If Not (challenge Is Nothing) Then
                       Console.WriteLine(ControlChars.NewLine + "The following challenge was raised by the server:{0}", challenge)
                   End If
               Else
                   Console.WriteLine(ControlChars.NewLine + "The following exception was raised : {0}", e.Message)
               End If
           Else
               Console.WriteLine(ControlChars.NewLine + "Response Received from server was null")
           End If 
       Catch e As Exception
           Console.WriteLine(ControlChars.NewLine + "The following exception was raised : {0}", e.Message)
       End Try
   End Sub 

.NET Framework
Available since 1.1
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