What is ASP.NET?

Performance. The code written in ASP.NET is compiled, so straight ahead it is a performance boost. The code written in .Net Framework is complied in Common Language Runtime. ASP.NET can take advantage of early binding, just-in-time compilation, automatic resource optimization, runtime profiling, automatic memory management, enhanced exception handling, and caching services, right out-of-the-box, this improves the performance before you start coding. A problem with Web site’s performance is with data-access.
For example, a database table will spend the majority of its execution time connecting to the database and querying the information.

ASP.NET comes with a data-caching module. This data-caching module allows you to specify what data on an ASP page to cache and on what conditions to empty the cache and re-query the data-store.

ASP.NET ships with Performance Counters which system administrators can use to gather application metrics. They can be used to measure the performance of either a single instance of an ASP.NET application or all ASP.NET applications combined on a computer.

Tool Support. Now you can drag-and-drop web controls like you do VB controls, double-click and write the server code for the control. ASP .NET supports XCOPY deployment that requires no registration or stopping of the server, supports dynamic DLL updates and extensible configuration using XML files.

Flexibility. Because ASP.NET is based on the Common Language Runtime, the power and flexibility of that entire platform is made available to web application developers. The Common Language Runtime's Base Class libraries, Messaging, and Data Access solutions are all seamlessly accessible from the web.

ASP.NET is also language-independent, so you can choose a language that best applies to your application, or partition your application across many languages. Further, Common Language Runtime interoperability guarantees that your existing investment in COM-based development is preserved when migrating to ASP.NET.

Simplicity. ASP.NET makes it easy to perform common tasks, from simple form submission and client authentication to deployment and site configuration. For example, the ASP.NET Page Framework allows you to build user interfaces that cleanly separate application logic from presentation code, and handle events in a simple, VB-like forms processing model. Additionally, the Common Language Runtime simplifies development with managed code services like automatic reference counting and garbage collection.

Manageability The ASP.NET configuration system handles both ends, and provides a hierarchical configuration set-up that enables extensible configuration data to be defined and used throughout an application, a Web site, and/or an entire domain. No server restart is required, even to deploy or replace running compiled code!

Scalability. ASP.NET has been designed with scalability in mind, enables automatic process recovery through error and memory overload detection. Session state can now be maintained in a number of ways. Session data can be passed in a hidden field within the pages, or in one of two out-of-process State Stores. The two flavors they come in are the ASP.NET State Store, which maintains stateful data in memory, or the SQL State Store, for writing stateful data to your SQL Server database.

Customizability and Extensibility. ASP.NET delivers a well-factored architecture that allows developers to "plug-in" their code at the appropriate level. In fact, it is possible to extend or replace any sub-component of the ASP.NET runtime with your own custom-written component. Implementing custom authentication or state services has never been easier.

Security ASP.NET works in conjunction with the Microsoft .NET Framework and Internet Information Server (IIS) 5.0 to provide outstanding security capabilities.

ASP.NET currently offers built-in support for three languages, C# (pronounced "C Sharp"), Visual Basic, and JScript.

ASP.NET is different from ASP in two major ways:

    ASP.NET offers several programmatic enhancements over ASP, such as, Compiled ASP.NET Scripts, Caching: Post-Back Forms: Server Controls, and Deployment.

    ASP.NET offers a change in programming fundamentals. ASP followed procedural pattern of creating pages.(e.g.; lets take a form which takes user information and then authenticates the user. Here we would generally create a form, which receives the user information in the first page, and then in the second page we would process the user collection for authentication in ASP.)

Writing ASP.NET pages is an entirely different experience, ASP.NET still requires this round trip to collect user input, but the developer does not need to concern himself with these pesky details. ASP.NET pages are created much more like VB apps. The above two pages can be clubbed together in one single page.

<FORM ACTION="Processform.aspx" RUNAT="server">

  Login Name: <asp:textbox id="Name"  runat="server"/>

  <BR>

 Password: <asp:password id="Password" runat="server"/>

<BR>

  <asp:button text="Login" runat="server" onclick="SubmitButton_Clicked"/>

<P>

  <B><asp:label id="Authentication" runat="server"/></B>

</FORM>

  <script language="vb" runat="server">

    Sub SubmitButton_Clicked(Object Scr, EventArgs E)

    Database processing to check for the user 

Authentication.Text = "Welcome," & Name.Text & "you are a valid user"

  End Sub

  </script>

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