HttpListener.IsListening Property


Gets a value that indicates whether HttpListener has been started.

 property bool IsListening { bool get(); };
public bool IsListening { get; }
member this.IsListening : bool
Public ReadOnly Property IsListening As Boolean

Property Value

true if the HttpListener was started; otherwise, false.


The following code example demonstrates using this property to determine the listening state of an instance.

public static void DisplayPrefixesAndState(HttpListener listener)
    // List the prefixes to which the server listens.
    HttpListenerPrefixCollection prefixes = listener.Prefixes;
    if (prefixes.Count == 0)
        Console.WriteLine("There are no prefixes.");
    foreach(string prefix in prefixes)
    // Show the listening state.
    if (listener.IsListening)
        Console.WriteLine("The server is listening.");
Public Shared Sub DisplayPrefixesAndState(ByVal listener As HttpListener)
    ' List the prefixes to which the server listens.
    Dim prefixes As HttpListenerPrefixCollection = listener.Prefixes

    If prefixes.Count = 0 Then
        Console.WriteLine("There are no prefixes.")
    End If

    For Each prefix As String In prefixes

    ' Show the listening state.
    If listener.IsListening Then
        Console.WriteLine("The server is listening.")
    End If
End Sub


To start an HttpListener, call the Start method.

Applies to