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Implementing a socket based Comet solution in ASP.NET

Learn to take advantage of the inner workings of ASP.NET's security model to help eliminate security vulnerabilities from your web applications.

A tutorial for implementing a modal popup window on your web site which will display a Microsoft Virtual Earth map with pinpoints on the locations of everyone who is currently browsing your web site.

This article shines the light on a bug I came across in the ASP.NET HyperLink control implementation. In particular, when using URL rewriting the HyperLink control's ImageUrl property can be, in certain circumstances, incorrectly rewritten. The good news is that there is a simple workaround that's made possible by the flexible architecture of ASP.NET.

This code backup your session in byte stream. It is useful when you swith the user or emulate the user and need to clear the current session. you can store this byte stream in newly created session as a session veriable and it is so simple to retrive the old session data from that byte stream. This is very useful when you are using SQL memebership provider and maintaining signin and signout using cookies.

There are a lot of ways to improve performance in web applications. One of the simplest but most effective methods is to cache images on the client. In this article I would like to show how we implemented image caching for our DotNetNuke website.

One of the most important security principles for software development is least privilege. Simply put, least privilege means that an application, process, or user should have the least access to resources required to accomplish a task and no more. By following this principle, even if your application is attacked or a user goes on the payroll of your nastiest competitor, you'll have limited the potential damage. Bottom line: implementing partial trust in ASP.NET is the single biggest thing you can do to make your applications secure.

On November 19, 2007, Microsoft officially released the ASP.NET version 3.5 and Visual Studio 2008. Like with the progression from ASP.NET 2.0 to 3.0, the features in ASP.NET 3.5 are additive, meaning that the core assemblies installed from the .NET Framework version 2.0 are still used by the 3.0 and 3.5 versions. The In short, ASP.NET 3.5 doesn't change or take away or break any functionality, concepts, or code present in 2.0 - it simply adds new types and features and capabilities to the framework.

This article provides an overview of the new features in ASP.NET 3.5 and the new web/ASP.NET-related features in Visual Studio 2008.

Over the past several years web developers have started using JavaScript to make asynchronous postbacks to the web server that only transmit and receive the necessary data; these techniques are commonly referred to as AJAX. Microsoft has released a free AJAX framework for ASP.NET developers named Microsoft ASP.NET AJAX. This article series examines using Microsoft's ASP.NET AJAX framework to build responsive user interfaces.

Since AJAX involves many disparate technologies at different layers in the networking stack, implementing AJAX without the use of an AJAX framework is difficult and error-prone. Fortunately, Microsoft has released a free AJAX framework for ASP.NET developers: Microsoft ASP.NET AJAX. This article is the first in a series of articles that examines the ASP.NET AJAX framework. This installment provides an overview of AJAX technologies and looks at getting started with Microsoft's framework. Future installments will focus on specific controls and scenarios..