HttpListenerRequest.UserAgent Property

Gets the user agent presented by the client.

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

public string UserAgent { get; }
/** @property */
public String get_UserAgent ()

public function get UserAgent () : String

Not applicable.

Property Value

A String object that contains the text of the request's User-Agent header.

The User-Agent header typically contains text that identifies the name and version number of the software used to generate the request.

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

The UserAgent is null when there is no User-Agent header in the request.

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 static void ShowRequestProperties1(HttpListenerRequest request)
{
    // Display the MIME types that can be used in the response.
    String types[] = request.get_AcceptTypes();
    if (types != null) {
        Console.WriteLine("Acceptable MIME types:");
        for (int iCtr = 0; iCtr < types.get_Length(); iCtr++) {
            String s = types[iCtr];
            Console.WriteLine(s);
        }
    }
    // Display the language preferences for the response.
    types = request.get_UserLanguages();
    if (types != null) {
        Console.WriteLine("Acceptable natural languages:");
        for (int iCtr = 0; iCtr < types.get_Length(); iCtr++) {
            String l = types[iCtr];
            Console.WriteLine(l);
        }
    }
    // Display the URL used by the client.
    Console.WriteLine("URL: {0}", request.get_Url().get_OriginalString());
    Console.WriteLine("Raw URL: {0}", request.get_RawUrl());
    Console.WriteLine("Query: {0}", request.get_QueryString());
    // Display the referring URI.
    Console.WriteLine("Referred by: {0}", request.get_UrlReferrer());
    //Display the HTTP method.
    Console.WriteLine("HTTP Method: {0}", request.get_HttpMethod());
    //Display the host information specified by the client;
    Console.WriteLine("Host name: {0}", request.get_UserHostName());
    Console.WriteLine("Host address: {0}", request.get_UserHostAddress());
    Console.WriteLine("User agent: {0}", request.get_UserAgent());
} //ShowRequestProperties1

Windows 98, Windows Server 2003, Windows XP Media Center Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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