Archive for the 'ASP.NET' Category

ASP.NET Chart Tools

Recently I needed a flexible chart tool in order to create complicated Gantt chart with 2 layers containing timelines, one layer containing milestones and some links for the Y axis labels. After some research I came across two tools - one generating Flash charts and one generating image charts. Below I’ll describe shortly my experience […]

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Validators inside Update Panel don’t work properly

I’m using ASP.NET AJAX in the last project I work on and I’m very happy such control as Update Panel exists. Unfortunately today I experienced problem with validators inside Update Panel.
Problem
I have a form with some fields and validators. The validators are hidden by default.When the button is clicked the error messages appear above the […]

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Cookie is lost when browser is closed

Today I had to develop very simple and standard functionality with cookies. I’ll describe this shortly.
Task
When user visits a site for the first time a disclaimer page must be displayed. Once the user agree with it a cookie value is changed to “true” and the next time the user opens the site the disclaimer is […]

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Gaia Ajax Widgets

Gaia Ajax Widgets is another framework (except ASP.NET AJAX extensions framework) built on top of the native ASP.NET server controls.
Pros:

Easy to use
Easy to extend
Lightweighted
No JavaScript required - you don’t have to write JavaScript at all
Gaia is FREE

Samples
Download

ajax, asp.net widgets

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ASP.NET 2.0 AJAX Extensions 1.0 Released

ASP.NET 2.0 AJAX Extensions 1.0 framework was released some days ago. You can use it for developing and running AJAX-style applications. Download the framework and the documentation or just read more about ASP.NET AJAX.
ASP.NET AJAX Control Toolkit was also released along with the framework. It is a shared-source community project consisting of samples and components […]

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Membership credential verification failed.

If you receive this error in the error log of your project here is its description and solution.
Prerequisites: Your application must have custom login functionality based on Forms Authentication method implemented. Also built-in functionality for Roles, Users and Membership must be used.
Problem: The visible issue is that the user cannot login to the application […]

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Forms authentication failed for the request. Reason: The ticket supplied was invalid.

Recently I experienced a strange problem with custom login functionality based on Forms Authentication method. The visible issue is that sometimes I login successfully to my application, sometimes - I can’t. In all the cases the same login details are used. When I reviewed the Event Log I found the following error:
Event viewer error:
Event code: […]

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