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URL authorization is one of the cornerstones of ASP NET authorization However, ASP NET also uses another type of authorization that s often not recognized This is file-based authorization, and it s implemented by the FileAuthorizationModule File-based authorization takes effect only if you re using Windows authentication If you re using custom authentication or forms authentication, it s not used To understand file authorization, you need to understand how the Windows operating system enforces file system security If your file system uses the NTFS format, you can set ACLs that specifically identify users and roles that are allowed or denied access to individual files The FileAuthorizationModule simply checks the Windows permissions for the file you re requesting For example, if you request a web page, the FileAuthorizationModule checks that the currently authenticated IIS user has the permissions required to access the underlying aspx file.

<type>jar</type> <scope>compile</scope> </dependency> Finally, we need to create a Main class where we are going to instantiate our UserDaoTraditionalJdbcImpl,call the findAll method to retrieve all users stored into our database, and print them to the console. Your Main class is like this: package com.apress.flexjava.usermanager.business; import import import import java.util.List; com.apress.flexjava.usermanager.dao.UserDao; com.apress.flexjava.usermanager.dao.jdbc.UserDaoTraditionalJdbcImpl; com.apress.flexjava.usermanager.model.User;

Note LINQ to Entities is the term that describes the act of applying LINQ queries to ADO.NET EF entity objects.

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If the user doesn t, the page code is not executed, and the user receives an access denied message New ASP NET users often wonder why file authorization needs to be implemented by a separate module shouldn t it take place automatically at the hands of the operating system To understand why the FileAuthorizationModule is required, you need to remember how ASPNET executes code Unless you ve enabled impersonation, ASP NET executes under a fixed user account, such as ASPNET The Windows operating system will check that the ASPNET account has the permissions it needs to access the aspx file, but it wouldn t perform the same check for a user authenticated by IIS The FileAuthorizationModule fills the gap It performs authorization checks using the security context of the current user.

Another possible approach: Rather than updating database data by finding a row, updating the row, and sending the row back for processing with a batch of SQL queries, you can simply change properties on an object and save its state. Again, the EF runtime updates the database automatically. As far as Microsoft is concerned, the ADO.NET Entity Framework is a new member of the data access family, and it is not intended to replace the connected or disconnected layers. However, once you spend some time working with EF, you might quickly find yourself preferring this rich object model over the more primitive world of SQL queries and row/column collections. Nevertheless, chances are you will find uses for all three approaches in your .NET projects; in some cases, the EF model might complicate your code base. For example, if you want to build an in-house application that needs to communicate only with a single database table, you might prefer to use the connected layer to hit a batch of related stored procedures. Larger applications can particularly benefit from EF, especially if the development team is comfortable working with LINQ. As with any new technology, you will need to determine how (and when) ADO.NET EF is appropriate for the task at hand.

As a result, the system administrator can set permissions to files or folders and control access to portions of an ASPNET application Generally, it s clearer and more straightforward to use authorization rules in the webconfig file However, if you want to take advantage of existing Windows permissions in a local network or an intranet scenario, you can..

Note You might recall a database programming API introduced with .NET 3.5 called LINQ to SQL. This API is close in concept (and fairly close in terms of programming constructs) to ADO.NET EF. While LINQ to SQL is not formally dead, the official word from those kind folks in Redmond is that you should put your efforts into EF, not LINQ to SQL.

With URL authorization and file authorization, you can control access only to individual web pages. The next step in ensuring a secure application is to build checks into your application before attempting specific tasks or allowing certain operations. To use these techniques, you ll need to write some code.

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