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As soon as a match is found, the user is granted or denied access, depending on if the match was found in an URL authorization makes it easy to specify coarse authorization rules that state what identities are permitted and which ones are denied from viewing a particular page (or all pages in a folder and its subfolders).
Following that, we will explore programmatic techniques. Delete User(User Name) ' Revert the grid's Edit Index to -1 and rebind the data User Grid.Before we can look at applying fine grain authorization rules, however, we first need to create a page whose functionality depends on the role of the user visiting it. Edit Index = -1 Bind User Grid() End Sub Note The Delete button does not require any sort of confirmation from the user before deleting the user account.Let's create a page that lists all of the user accounts in the system in a Grid View. I encourage you to add some form of user confirmation to lessen the chance of an account being accidentally deleted.For more information on this security recommendation, as well as other security concerns, refer to the Security Question List for ASP. parameter, as this parameter indicates that the user arrived at the login page after attempting to view a page he was not authorized to view.Figure 4: Only Users in the Administrators Role Can View the Protected Pages (Click to view full-size image) Log off and then log in as a user that is in the Administrators role.Now you should be able to view the three protected pages.
Figure 5: Tito Can Visit the Note When specifying URL authorization rules – for roles or users – it is important to keep in mind that the rules are analyzed one at a time, from the top down.Technically, I didn't need to specify values for these attributes since I just assigned them to their default values, but I put them here to make it explicitly clear that I am not using persistent cookies and that the cookie is both encrypted and validated. Henceforth, the Roles framework will cache the users' roles in cookies.If the user's browser does not support cookies, or if their cookies are deleted or lost, somehow, it's no big deal – the Note Microsoft's Patterns & Practices group discourages using persistent role cache cookies.Following that, we will look at using declarative and programmatic means for altering the data displayed and the functionality offered by an ASP. Or we could dictate that only users Tito and Bob were allowed, or indicate that all authenticated users except for Sam were permitted.In addition to URL authorization, we also looked at declarative and programmatic techniques for controlling the data displayed and the functionality offered by a page based on the user visiting.For more information on cookies, how they work, and their various properties, read this Cookies tutorial. The path attribute enables a developer to limit the scope of a cookie to a particular directory hierarchy.