Web Technologies

Web Applications ( ASP.NET, ASP 3.0,.. )


  • ASP.NET Controls
  • Database
  • Images and Multimedia
  • Validation
  • Purgatory



The AdRotator web server control cycles through a series of clickable ad banners, and allows some ads to be weighted more heavily than others. Ads can either be linked to the control using an XML file with a predefined schema or by creating your own custom logic. Use the AdRotator control to retrieve and display ads with one of two methods:

  • Create an XML file containing references to ad banners and their associated properties.
  • Write your own logic to select an ad banner in the AdCreated event.

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ASP.NET Application Using MySQL DataBase:


.NET is the new distributed computing platform developed by Microsoft and ASP.NET is its programming model for web development. I'm creating a Web Form with a DataGrid for data entry using C#. How can I make a DataGrid cell display a textbox for showing a list of products in all the rows. This solution will teach you how to use a MySQL database with ASP.NET. I have developed this sample with ASP.NET 1.1 using C# as the code-behind using MySQL 4.1. I think this will be a more useful article for beginners studying .NET. In this sample, I have taken the DataGrid control for demonstration. All the basic operations of the DataGrid are explained in this article.

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Save Image to SQL server 2000 Database using ASP.NET and C# as codebehind:


The intent of this article is to get a good experience in developing data driven ASP.NET Web Forms applications by means of a real world application. This application will teach you how to save an image file into a database and how to retrieve it from the database. It uses ADO.NET as the data access mechanism, C# as the development language, and SQL Server 2000 as the backend database.

Normally, images are saved in the web server folder, not in the database; this is for larger file size category. In some cases like, in bank, for example, they scan the user signatures as image files and save that file into the database.

  • Database schema

    MS SQL Server 2000 is used as the backend database for this small demonstration. And I used a special data type in SQL Server called image. The image data type is used to save the image into the database.

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POP-UP Calendar Control:


The popup calendar I have developed using Microsoft technology is more simple to use and easy to integrate with your dot net web application.

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Validator Controls in ASP.NET:


Validation Controls:

This set of controls provide Rapid Application Development (RAD) features for automatically checking the specified validity of user inputs. These controls are available in the System.Web.UI.WebControls namespace.

One of the most tiresome tasks when building interactive web applications is the requirement for validating values that the user enters into the input controls. This is particularly the case if we need to perform client-side as well as server side validation. Mostly, we use JavaScript for client side coding. Help is at hand with the range of validation controls that are included in ASP.NET.

They cover almost all the validation scenarios. A validation control enables us to validate an input and display an error message if necessary. It is very much like other server-side controls, with certain additional methods and properties. First, the server treats it as an invisible control. After the user has entered erroneous data, it becomes visible. It is a powerful, rapid application development feature; however, a developer needs to understand its behavior and the methods thoroughly before he or she can appreciate it. All the validation controls inherit from the base class BaseValidator, which is part of the class library namespace. System.Web.UI.WebControls.BaseValidator exposes a series of properties and methods that are common to all the validation controls.


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