Gets the user agent presented by the client.
Assembly: System (in System.dll)
Syntax . . :: . String
A String object that contains the text of the request's User-Agent header.
Public ReadOnly Property UserAgent As Stringpublic string UserAgent { get; }public:
property String^ UserAgent {
String^ get ();
}member UserAgent : string
Property Value
Type: SystemA String object that contains the text of the request's User-Agent header.
Remarks
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.
Examples
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
Console.WriteLine(s)
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
Console.WriteLine(l)
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
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);
}
Platforms
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.