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The Membership API includes a method for programmatically validating a user's credentials against the user store. NET ships with the Login Web control, which renders a user interface with textboxes for the username and password and a button to log in.

While this behavior lessens the likelihood that a hacker will break into your site through brute force methods, it can end up locking out a valid user who has simply forgotten her password or accidentally has the Caps Lock on or is having a bad typing day.

Note that the Login control's default interface includes Text Box controls for the username and password, a Remember me next time Check Box, and a Log In Button. Figure 3: Add a Login Control to the Page (Click to view full-size image) And we're done!

When the Login control's Log In button is clicked, a postback will occur and the Login control will call the method, passing in the entered username and password.

These credentials are then compared against the user store.

If they are valid, then the user is granted a forms authentication ticket, which is a security token that indicates the identity and authenticity of the visitor.

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In this tutorial we will examine how to validate a user's credentials against the Membership user store using both programmatic means and the Login control.

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