.NET Framework Class Library
HttpListenerResponse..::.ContentLength64 Property

Gets or sets the number of bytes in the body data included in the response.

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

Visual Basic (Declaration)
Public Property ContentLength64 As Long
Visual Basic (Usage)
Dim instance As HttpListenerResponse
Dim value As Long

value = instance.ContentLength64

instance.ContentLength64 = value
C#
public long ContentLength64 { get; set; }
Visual C++
public:
property long long ContentLength64 {
    long long get ();
    void set (long long value);
}
JScript
public function get ContentLength64 () : long
public function set ContentLength64 (value : long)

Property Value

Type: System..::.Int64
The value of the response's Content-Length header.
Exceptions

ExceptionCondition
ArgumentOutOfRangeException

The value specified for a set operation is less than zero.

InvalidOperationException

The response is already being sent.

ObjectDisposedException

This object is closed.

Remarks

The Content-Length header expresses the length, in bytes, of the response's body data. When using a format that is not send the data chunked or raw, you must set the ContentLength64 property. If you do not, the HttpListener does not send the response data.

For a complete list of response headers, see the HttpResponseHeader enumeration.

Examples

The following code example demonstrates setting the value of this property.

C#
// This example requires the System and System.Net namespaces.
public static void SimpleListenerExample(string[] prefixes)
{
    if (!HttpListener.IsSupported)
    {
        Console.WriteLine ("Windows XP SP2 or Server 2003 is required to use the HttpListener class.");
        return;
    }
    // URI prefixes are required,
    // for example "http://contoso.com:8080/index/".
    if (prefixes == null || prefixes.Length == 0)
      throw new ArgumentException("prefixes");

    // Create a listener.
    HttpListener listener = new HttpListener();
    // Add the prefixes.
    foreach (string s in prefixes)
    {
        listener.Prefixes.Add(s);
    }
    listener.Start();
    Console.WriteLine("Listening...");
    // Note: The GetContext method blocks while waiting for a request. 
    HttpListenerContext context = listener.GetContext();
    HttpListenerRequest request = context.Request;
    // Obtain a response object.
    HttpListenerResponse response = context.Response;
    // Construct a response.
    string responseString = "<HTML><BODY> Hello world!</BODY></HTML>";
    byte[] buffer = System.Text.Encoding.UTF8.GetBytes(responseString);
    // Get a response stream and write the response to it.
    response.ContentLength64 = buffer.Length;
    System.IO.Stream output = response.OutputStream;
    output.Write(buffer,0,buffer.Length);
    // You must close the output stream.
    output.Close();
    listener.Stop();
}
Platforms

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
Version Information

.NET Framework

Supported in: 3.5, 3.0, 2.0
See Also

Reference

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