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HttpRequest.LogonUserIdentity Property

Gets the WindowsIdentity type for the current user.

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

Public ReadOnly Property LogonUserIdentity As WindowsIdentity

Property Value

Type: System.Security.Principal.WindowsIdentity
A WindowsIdentity object for the current Microsoft Internet Information Services (IIS) authentication settings.


The Web application is running in IIS 7 integrated mode and the PostAuthenticateRequest event has not yet been raised.

The LogonUserIdentity property exposes the properties and methods of the WindowsIdentity object for the currently connected user to Microsoft Internet Information Services (IIS). The instance of the WindowsIdentity class that is exposed by LogonUserIdentity tracks the IIS request token and provides easy access to this token for the current HTTP request being processed inside of ASP.NET. An instance of the WindowsIdentity class is automatically created so it does not need to be constructed to in order to gain access to its methods and properties.

The following code example shows how to retrieve the LogonUserIdentity property for the current user and write out the values of each item in a text file. Place this code on the ASP.NET page referenced by the form's ACTION attribute.

<%@ Page Language="VB" %>
<%@ import Namespace="System.IO" %>

<script runat="server">

    ' * NOTE: To use this sample, create a c:\temp  folder,
    ' *  add the ASP.NET account (in IIS 5.x <machinename>\ASPNET,
    ' *  in IIS 6.x NETWORK SERVICE), and give it write permissions
    ' *  to the folder.

    Private Const INFO_DIR As String = "c:\temp\"

    Private Sub Page_Load(sender As Object, e As System.EventArgs)

        ' Validate that user is authenticated
        If Not (Request.LogonUserIdentity.IsAuthenticated) Then
        End If

        ' Create a string that contains the file path
        Dim strFilePath As String = INFO_DIR & "VB_Log.txt"

        Response.Write("Writing log file to " & strFilePath & "...")

        ' Create stream writer object and pass it the file path
        Dim sw As StreamWriter = File.CreateText(strFilePath)

        ' Write user info to log
        sw.WriteLine("Access log from " & DateTime.Now.ToString())
        sw.WriteLine("User: " & Request.LogonUserIdentity.User.ToString())
        sw.WriteLine("Name: " & Request.LogonUserIdentity.Name)
        sw.WriteLine("AuthenticationType: " & Request.LogonUserIdentity.AuthenticationType)
        sw.WriteLine("ImpersonationLevel: " & Request.LogonUserIdentity.ImpersonationLevel)
        sw.WriteLine("IsAnonymous: " & Request.LogonUserIdentity.IsAnonymous)
        sw.WriteLine("IsGuest: " & Request.LogonUserIdentity.IsGuest)
        sw.WriteLine("IsSystem: " & Request.LogonUserIdentity.IsSystem)
        sw.WriteLine("Owner: " & Request.LogonUserIdentity.Owner.ToString())
        sw.WriteLine("Token: " & Request.LogonUserIdentity.Token.ToString())

        ' Close the stream to the file.
    End Sub


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

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.