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HttpListenerRequest.KeepAlive Property

Gets a Boolean value that indicates whether the client requests a persistent connection.

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

Public ReadOnly Property KeepAlive As Boolean

Property Value

Type: System.Boolean
true if the connection should be kept open; otherwise, false.

If an HTTP client and server expect to exchange data multiple times in a short time period, a persistent connection speeds up their communications by allowing them to avoid the overhead required to open and close a TCP connection for each message. For clients using HTTP/1.1, the default value for this property is true.

The following code example demonstrates using this property.

Public Shared Sub ShowRequestProperties2(ByVal request As HttpListenerRequest)
    Console.WriteLine("KeepAlive: {0}", request.KeepAlive)
    Console.WriteLine("Local end point: {0}", request.LocalEndPoint.ToString())
    Console.WriteLine("Remote end point: {0}", request.RemoteEndPoint.ToString())
    Console.WriteLine("Is local? {0}", request.IsLocal)
    Console.WriteLine("HTTP method: {0}", request.HttpMethod)
    Console.WriteLine("Protocol version: {0}", request.ProtocolVersion)
    Console.WriteLine("Is authenticated: {0}", request.IsAuthenticated)
    Console.WriteLine("Is secure: {0}", request.IsSecureConnection)

End Sub

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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.