HttpListenerRequest.UserHostName Property

Definition

Namespace:

System.Net

Assembly:

System.Net.HttpListener.dll

Source:

HttpListenerRequest.cs

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

public:
 property System::String ^ UserHostName { System::String ^ get(); };

public string UserHostName { get; }

member this.UserHostName : string

Public ReadOnly Property UserHostName As String

Property Value

String

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

Examples

The following code example demonstrates using this property.

public static void ShowRequestProperties1 (HttpListenerRequest request)
{
    // Display the MIME types that can be used in the response.
    string[] types = request.AcceptTypes;
    if (types != null)
    {
        Console.WriteLine("Acceptable MIME types:");
        foreach (string s in types)
        {
            Console.WriteLine(s);
        }
    }
    // Display the language preferences for the response.
    types = request.UserLanguages;
    if (types != null)
    {
        Console.WriteLine("Acceptable natural languages:");
        foreach (string l in types)
        {
            Console.WriteLine(l);
        }
    }

    // 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);
}

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
            Console.WriteLine(s)
        Next
    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
            Console.WriteLine(l)
        Next
    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

Remarks

The Host header contains the requested server host name and port number, if specified, separated by a colon (for example, www.contoso.com:8080).

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.

See also

• HttpListener
• HttpListenerContext
• HttpListenerResponse