HttpWebResponse.ProtocolVersion Property


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Gets the version of the HTTP protocol that is used in the response.

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

Public ReadOnly Property ProtocolVersion As Version

Property Value

Type: System.Version

A Version that contains the HTTP protocol version of the response.

Exception Condition

The current instance has been disposed.

The ProtocolVersion property contains the HTTP protocol version number of the response sent by the Internet resource.

This example creates an HttpWebRequest and queries for an HttpWebResponse. The example then checks to see if the server is responding with the same version.

Dim ourUri As New Uri(url)
' Creates an HttpWebRequest with the specified URL. 
Dim myHttpWebRequest As HttpWebRequest = CType(WebRequest.Create(ourUri), HttpWebRequest)
myHttpWebRequest.ProtocolVersion = HttpVersion.Version10
' Sends the request and waits for the response.
Dim myHttpWebResponse As HttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)
'The ProtocolVersion property is used to ensure that only Http/1.0 responses are accepted. 
If myHttpWebResponse.ProtocolVersion Is HttpVersion.Version10 Then
    Console.WriteLine(ControlChars.NewLine + "The server responded with a version other than Http/1.0")
    If myHttpWebResponse.StatusCode = HttpStatusCode.OK Then
        Console.WriteLine(ControlChars.NewLine + "Request sent using version HTTP/1.0. Successfully received response with version Http/1.0 ")
    End If
End If
' Releases the resources of the response.

.NET Framework
Available since 1.1
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