Export (0) Print
Expand All

HttpWebRequest.HaveResponse Property

Gets a value that indicates whether a response has been received from an Internet resource.

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

'Declaration
Public ReadOnly Property HaveResponse As Boolean
'Usage
Dim instance As HttpWebRequest
Dim value As Boolean

value = instance.HaveResponse

/** @property */
public boolean get_HaveResponse ()

public function get HaveResponse () : boolean

Not applicable.

Property Value

true if a response has been received; otherwise, false.

The following code example checks the HaveResponse property to determine if a response has been received from an Internet resource.

' Create a new 'HttpWebRequest' Object.
Dim myHttpWebRequest As HttpWebRequest = CType(WebRequest.Create("http://www.contoso.com"), HttpWebRequest)
Dim myHttpWebResponse As HttpWebResponse
' Display the 'HaveResponse' property of the 'HttpWebRequest' object to the console.
Console.WriteLine(ControlChars.Cr + "The value of 'HaveResponse' property before a response object is obtained :{0}", myHttpWebRequest.HaveResponse)
' Assign the response object of 'HttpWebRequest' to a 'HttpWebResponse' variable.
myHttpWebResponse = CType(myHttpWebRequest.GetResponse(), HttpWebResponse)
If myHttpWebRequest.HaveResponse Then
    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
      '  Close the Stream object.
      streamResponse.Close()
      streamRead.Close()
      ' Release the HttpWebResponse Resource.
      myHttpWebResponse.Close()
    Console.WriteLine(ControlChars.Cr + "Press 'Enter' key to continue..........")
    Console.Read()

Else
    Console.WriteLine(ControlChars.Cr + "The response is not received ")
End If

// Create a new 'HttpWebRequest' Object.
HttpWebRequest myHttpWebRequest = (HttpWebRequest)
    (WebRequest.Create("http://www.contoso.com"));
HttpWebResponse myHttpWebResponse;
// Display the 'HaveResponse' property of the 'HttpWebRequest' 
// object to the console.
Console.WriteLine("\nThe value of 'HaveResponse' property before a"
    +" response object is obtained :{0}", 
    System.Convert.ToString(myHttpWebRequest.get_HaveResponse()));
// Assign the response object of 'HttpWebRequest' to a
//'HttpWebResponse' variable.
myHttpWebResponse = (HttpWebResponse)
    (myHttpWebRequest.GetResponse());

if (myHttpWebRequest.get_HaveResponse()) {
    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);
    }

    // Close the Stream object.
    streamResponse.Close();
    streamRead.Close();
    // Release the HttpWebResponse Resource.
    myHttpWebResponse.Close();
    Console.WriteLine("\nPress 'Enter' key to continue..........");
    Console.Read();
}
else {
    Console.WriteLine("\nThe response is not received ");
}

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

Community Additions

ADD
Show:
© 2014 Microsoft