ASP.NET Viewstate And Controlstate Performance Enhancements - Saving Viewstate And Controlstate On Server

Viewstate and Controlstate are used in ASP.NET pages to keep states of pages and all controls on them between postbacks. ASP.NET framework saves these states in a container to be used throughout postbacks to maintain these states. Also, you can explicitly add any info you need to keep between postbacks inside the page viewstate. This may seem urging but you must know that this doesn't come free of charge. Yes viewstate and controlstate are...

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How To Avoid Problems Caused By Clients' Browser Cached Resource Files (JS, CSS, ....) With Every New Build

Browsers like IE, Firefox, Chrome and others have their own way to decide if a file should be cached or not. If a file link (URL) is requested more than a certain number of times the browser decides to cache this file to avoid repeated requests and their relevant responses. So, after a file is cached by the browser and a new request is performed for this file, the browser responses with the cached version of the file instead of retrieving the...

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Application To Generate Combined Images Of All Image-Categories Possible Combinations

[Update] The application is now updated to avoid "out of memory" exceptions. On my last project I was working on a tree control which represents system business objects into hierarchical form. Each object has a workflow to go through and for each step in this workflow the object state changes. So, one of the requirements was to add images beside each tree node for the system user to know the status of each tree node easily with the need to open...

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Forcing ASP.NET Control To Go Through Its Full Life Cycle On Static Methods

A few days ago I needed to use a custom control which I made as a template to generate some HTML and return it as a response for an Ajax call, but, I faced a problem which is that my WebMethod is a static method which cannot access the control instance i dropped on the same page including the WebMethosd on code behind. To make it more clear, here was the situation. I was working on an ASP.NET tree control which represents some system objects into hierarchical form. When testing the tree on few objects everything went fine, but with increasing...

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Possibilities Cube Library - A Library Smart Enough To Calculate All Possibilities With Logical Conditions

Let's imagine that as a big advertisement campaign Vodafone, Samsung & Nokia co-arranged a lottery. The winner will get two mobile phones in addition to two SIM cards with special numbers. It is obvious that the SIM cards will be provided by Vodafone while the mobile phones manufacturer will be decided by toss, so the winner may get two phones from Samsung or Nokia or both. Also, the phones specifications will be somehow restricted as...

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How To Copy SQL Hierarchical Data At Run-time While Keeping Valid Internal References And Self Joins

Sometimes when you deal with hierarchical data structures you may need to perform internal copy operations. To imagine what I mean, you can keep up with the scenario illustrated below. You have a "Departments" table which include all departments in your system. Each department should have a parent department except for the top department which has no parent. Now, assume that at some point in your system you need to make duplicates of the existing...

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How To Transform Unsorted Flat Hierarchical Data Structures Into Nested Parent-Child Or Tree Form Objects

Assume that you have hierarchical data structure presented into an SQL database table as in the image below. As you can see each employee in the "Employees" table above can have a Manager which is an employee himself. In this case when the employee "Tarek" has "ManagerID" whose ID = 1, then "Tarek" has "Ahmed" as his manager. While "Ahmed" doesn't have a manager as he is the top manager. This leads us to visualize the whole structure into parent-child...

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