ASP.NET 4 social networking : a truly hands-on book for by Atul Gupta; Sudhanshu Hate; Andrew Siemer

By Atul Gupta; Sudhanshu Hate; Andrew Siemer

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Once this is in place, all we need to do is have a system that checks a user's permissions upon entering each page to ensure that they have the permission that the page requires. [ 59 ] User Accounts We will have a Permissions table, that relates to the Accounts table through the AccountPermissions table. This is a pretty straightforward and simple design. Password encryption/decryption When working with passwords, there is an important question to answer. Do we have one way hashing, or do we store encrypted passwords and provide a way to decrypt them?

Interfaces; At the class level add the following private variable with Import attribute. At runtime, MEF engine will search for matching Export attribute on a class and instantiate it. [Import] public IRedirector redir; [Import] public ILogger log; We don't need to create the object of Redirector or Log class ourselves. MEF infrastructure takes care of doing that. But before this we do need to dynamically locate the implementation of part (or component) and compose it in the main assembly. At runtime, we need to pick up the implementation for IRedirector, ILog and add it to the container.

MEF infrastructure takes care of doing that. But before this we do need to dynamically locate the implementation of part (or component) and compose it in the main assembly. At runtime, we need to pick up the implementation for IRedirector, ILog and add it to the container. For this, first you need to create a Catalog for hosting assemblies and then pick up matching implementation for IRedirector, ILog from the directory where the assembly for the implementation of IRedirector, ILog is residing.

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