Validates a user name and password against credentials stored in the configuration file for an application.
Assembly: System.Web (in System.Web.dll)
The Authenticate method verifies user credentials that are stored in the credentials section of the application configuration file. Alternatively, you can use ASP.NET membership to store user credentials and call the ValidateUser to verify the credentials. For more information, see Managing Users by Using Membership.
For improved security, you can encrypt passwords stored in the configuration file for an application by using the HashPasswordForStoringInConfigFile method.
The following code example shows user credentials stored in the Web.config file for an application. The password values have been hashed using the HashPasswordForStoringInConfigFile method.
<user name="user1" password="27CE4CA7FBF00685AF2F617E3F5BBCAFF7B7403C" />
<user name="user2" password="D108F80936F78DFDD333141EBC985B0233A30C7A" />
<user name="user3" password="7BDB09781A3F23885CD43177C0508B375CB1B7E9"/>
The following code example shows a login page that uses the method to validate user credentials.
This example contains a text box that accepts user input, which is a potential security threat. By default, ASP.NET Web pages validate that user input does not include script or HTML elements. For more information, see Script Exploits Overview.
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.