HttpWebRequest.UserAgent Eigenschaft

Definition

Ruft den Wert des User-agent-HTTP-Headers ab oder legt ihn fest.Gets or sets the value of the User-agent HTTP header.

public:
 property System::String ^ UserAgent { System::String ^ get(); void set(System::String ^ value); };
public string UserAgent { get; set; }
member this.UserAgent : string with get, set
Public Property UserAgent As String

Eigenschaftswert

Der Wert des User-agent-HTTP-Headers.The value of the User-agent HTTP header. Der Standardwert ist nullsein.The default value is null.


Der Wert für diese Eigenschaft wird in der WebHeaderCollection gespeichert.The value for this property is stored in WebHeaderCollection. Wenn WebHeaderCollection festgelegt wird, geht der Eigenschaftswert verloren.If WebHeaderCollection is set, the property value is lost.

Beispiele

Im folgenden Beispiel wird die Eigenschaft auf UserAgent festgelegt.The following code example sets the UserAgent property.

// Create a new 'HttpWebRequest' object to the mentioned URL.
HttpWebRequest^ myHttpWebRequest = (HttpWebRequest^)( WebRequest::Create( "http://www.contoso.com" ) );
myHttpWebRequest->UserAgent = ".NET Framework Test Client";
// Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse' variable.
HttpWebResponse^ myHttpWebResponse = (HttpWebResponse^)( myHttpWebRequest->GetResponse() );
// Display the contents of the page to the console.
Stream^ streamResponse = myHttpWebResponse->GetResponseStream();
StreamReader^ streamRead = gcnew StreamReader( streamResponse );
array<Char>^ readBuff = gcnew array<Char>(256);
int count = streamRead->Read( readBuff, 0, 256 );
Console::WriteLine( "\nThe contents of HTML Page are :\n" );
while ( count > 0 )
{
   String^ outputData = gcnew String( readBuff,0,count );
   Console::Write( outputData );
   count = streamRead->Read( readBuff, 0, 256 );
}
streamRead->Close();
streamResponse->Close();
myHttpWebResponse->Close();
// Create a new 'HttpWebRequest' object to the mentioned URL.
HttpWebRequest myHttpWebRequest=(HttpWebRequest)WebRequest.Create("http://www.contoso.com");
myHttpWebRequest.UserAgent=".NET Framework Test Client";
// Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse' variable.
HttpWebResponse myHttpWebResponse=(HttpWebResponse)myHttpWebRequest.GetResponse();
// Display the contents of the page to the console.
Stream streamResponse=myHttpWebResponse.GetResponseStream();
StreamReader streamRead = new StreamReader( streamResponse );
Char[] readBuff = new Char[256];
int count = streamRead.Read( readBuff, 0, 256 );
Console.WriteLine("\nThe contents of HTML Page are :\n");	
while (count > 0) 
{
    String outputData = new String(readBuff, 0, count);
    Console.Write(outputData);
    count = streamRead.Read(readBuff, 0, 256);
}
// Release the response object resources.
streamRead.Close();
streamResponse.Close();
myHttpWebResponse.Close();
 ' Create a new 'HttpWebRequest' object to the mentioned URL.
  Dim myHttpWebRequest As HttpWebRequest = CType(WebRequest.Create("http://www.contoso.com"), HttpWebRequest)
  myHttpWebRequest.UserAgent= ".NET Framework Test Client"
  ' The response object of 'HttpWebRequest' is assigned to a 'HttpWebResponse' variable.
  Dim myHttpWebResponse As HttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)
  ' Display the contents of the page to the console.
  Dim streamResponse As Stream = myHttpWebResponse.GetResponseStream()
  Dim streamRead As New StreamReader(streamResponse)
  Dim readBuff(256) As [Char]
  Dim count As Integer = streamRead.Read(readBuff, 0, 256)
  Console.WriteLine(ControlChars.Cr + "The contents of HTML Page are :" + ControlChars.Cr)
  While count > 0
      Dim outputData As New [String](readBuff, 0, count)
      Console.Write(outputData)
      count = streamRead.Read(readBuff, 0, 256)
  End While
  streamRead.Close()
   streamResponse.Close()    
' Release the response object resources.
   myHttpWebResponse.Close()

Gilt für: