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.NET Framework Class Library
HttpWebResponse..::.ProtocolVersion Property

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

Namespace: System.Net
Assembly: System (in System.dll)
Syntax
Public ReadOnly Property ProtocolVersion As Version
public Version ProtocolVersion { get; }
public:
property Version^ ProtocolVersion {
	Version^ get ();
}
member ProtocolVersion : Version

Property Value

Type: System..::.Version
A Version that contains the HTTP protocol version of the response.
Exceptions
ExceptionCondition
ObjectDisposedException

The current instance has been disposed.

Remarks

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

Examples

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")
Else
    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.
myHttpWebResponse.Close()


            Uri ourUri = new Uri(url);
				// Creates an HttpWebRequest for the specified URL. 
				HttpWebRequest myHttpWebRequest = (HttpWebRequest)WebRequest.Create(ourUri); 
				myHttpWebRequest.ProtocolVersion = HttpVersion.Version10;
				// Sends the HttpWebRequest and waits for the response.
				HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse(); 
				// Ensures that only Http/1.0 responses are accepted. 
				if(myHttpWebResponse.ProtocolVersion != HttpVersion.Version10)
					Console.WriteLine("\nThe server responded with a version other than Http/1.0");
				else
				if (myHttpWebResponse.StatusCode == HttpStatusCode.OK)
					Console.WriteLine("\nRequest sent using version Http/1.0. Successfully received response with version HTTP/1.0 ");
				// Releases the resources of the response.
				myHttpWebResponse.Close(); 


Uri^ ourUri = gcnew Uri( url );
// Creates an HttpWebRequest for the specified URL.
HttpWebRequest^ myHttpWebRequest = (HttpWebRequest^)( WebRequest::Create( ourUri ) );
myHttpWebRequest->ProtocolVersion = HttpVersion::Version10;
// Sends the HttpWebRequest and waits for the response.
HttpWebResponse^ myHttpWebResponse = (HttpWebResponse^)( myHttpWebRequest->GetResponse() );
// Ensures that only Http/1.0 responses are accepted.
if ( myHttpWebResponse->ProtocolVersion != HttpVersion::Version10 )
{
   Console::WriteLine( "\nThe server responded with a version other than Http/1.0" );
}
else if ( myHttpWebResponse->StatusCode == HttpStatusCode::OK )
{
   Console::WriteLine( "\nRequest sent using version Http/1.0. Successfully received response with version HTTP/1.0 " );
}
// Releases the resources of the response.
myHttpWebResponse->Close();

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
Platforms

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.