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HttpListenerRequest.UserHostName Property

Gets the DNS name and, if provided, the port number specified by the client.

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

Public ReadOnly Property UserHostName As String

Property Value

Type: System.String
A String value that contains the text of the request's Host header.

The Host header contains the requested server host name and port number, if specified, separated by a colon (for example,

You can use this property to return different responses depending on the host name specified in the request.

For a complete list of request headers, see the HttpRequestHeader enumeration.

The following code example demonstrates using this property.

Public Shared Sub ShowRequestProperties1(ByVal request As HttpListenerRequest)
    ' Display the MIME types that can be used in the response.
    Dim types() As String = request.AcceptTypes
    If types IsNot Nothing Then
        Console.WriteLine("Acceptable MIME types:")
        For Each s As String In types
        Next s
    End If
    ' Display the language preferences for the response.
    types = request.UserLanguages
    If types IsNot Nothing Then
        Console.WriteLine("Acceptable natural languages:")
        For Each l As String In types
        Next l
    End If

    ' Display the URL used by the client.
    Console.WriteLine("URL: {0}", request.Url.OriginalString)
    Console.WriteLine("Raw URL: {0}", request.RawUrl)
    Console.WriteLine("Query: {0}", request.QueryString)

    ' Display the referring URI.
    Console.WriteLine("Referred by: {0}", request.UrlReferrer)

    'Display the HTTP method.
    Console.WriteLine("HTTP Method: {0}", request.HttpMethod)
    'Display the host information specified by the client;
    Console.WriteLine("Host name: {0}", request.UserHostName)
    Console.WriteLine("Host address: {0}", request.UserHostAddress)
    Console.WriteLine("User agent: {0}", request.UserAgent)
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.