.NET news » ASP.NET

A remote task is a piece of code that executes on the server in response to a client event. There are three possible ways for an ASP.NET AJAX client page to trigger a remote task: by causing a postback managed by an UpdatePanel control, by invoking a method directly on the application’s back end exposed through a local Web service, and by using a page method. Soon there will be a fourth method: a Windows Communication Foundation (WCF) service..

Do you have a iGoogle Account? Well if you are like the rest of the world that use the internet you will have, which also means that you have seen the very cool (and useful) "Password strength" control.

The big secret is this is actually a public API from google, which you can pass a password and it will return the password strength from 1 (least secure) to 4 (most secure).

And here is the "BUT", there is no interface for the control and it is not openly advertised by Google...

Auto-Completion is a very interesting feature that was primarily made popular by Google. I have already written a couple of articles that explain how to implement this feature. In this article, I will implement the auto-completion feature using ASP.NET 2.0 client callbacks.

Those who create commercial sites are faced with the question, "How should it receive payments?" One of the most popular payment systems in the world is PayPal. This system is often chosen because it is reliable, simple to use and allows an account to be easily opened. To open an account, you need only have a credit card and/or an account in an American bank. One of shortcomings of the system is its severe security policy. However, practice evinces that if you follow the rules of the system carefully, then errors are very rare. The purpose of this article is to show how payments processing can be organized to support reliability and security. The article is also aimed at providing you with an example of the development of a simple online shop, in order to demonstrate interaction with the PayPal system. You can use the code in your applications to organize interaction with the PayPal system and to process payments.

In this article we will see just how easy it is to display XML data in an ASP.NET 2.0 page. In particular, we will build a User Control that will display the contents of an RSS feed. Once created, this User Control can be dragged onto the Design surface of any ASP.NET page in your project and configured to display the contents of a particular RSS feed by simply setting the control's Url property to the URL of the RSS feed.

Most of you are familiar with the feature of all web-browsers that when you press the F5 button, the content of a page is refreshed. After the F5 button is pressed, the browser repeats the previous request to the page. Nothing wrong will actually happen when the previous request is made by the GET method. However, problems appear when the last request is made by the POST method. Let's consider an example where a user is transferring money to a shop to pay for some goods. Having completed this operation, the user refreshes the page and as a result the server code is executed once again with the same data. Thus, the user may accidentally pay twice..

Think of this article as a beginners guide to think about design and security when solving problems.

In this second part of a two-part series, you will learn about application security issues related to authentication and authorization, as well as five vulnerabilities commonly found in ASP.NET web-based applications.

jThermometer is a class for creating thermometer charts of the type used generally to show progress toward a fund raising goal. The chart uses GDI+ to compose an image and stream it out to the browser.

Using custom policy injection, you can configure and apply policies exactly the way you want them, doing it right requires a little effort.