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This class, along with the class definition in the code file, and system generated code, together make the executable code (assembly) that processes all posted data, generates response, and sends it back to the client. At run-time, the content file is parsed and transformed into a page class.

The browser submits a web form to the web server and the server returns a full markup page or HTML page in response. The label shows page load, page initialization and, the page pre-render events. The methods and properties of the Http Server Utility class are exposed through the intrinsic Server object provided by ASP. The following table provides a list of the properties: The request object is an instance of the System. The information presented by this object is wrapped by the higher level abstractions (the web control model). However, the Http Response object still provides some important functionalities, like the cookie feature and the Redirect() method. Redirect() method allows transferring the user to another page, inside as well as outside the application. The following table provides some noteworthy properties of the Response object: The following simple example has a text box control where the user can enter name, a button to send the information to the server, and a label control to display the URL of the client computer. A Tree view control comes under navigation controls. task allows you to format the tree view as shown: Add a label control and a text box control on the page and name them lblmessage and txtmessage respectively. To create a group of radio buttons, you specify the same name for the Group Name attribute of each radio button in the group.

To clear the concept, let us take an example of a shopping cart. Items are selected from a page, say the items page, and the total collected items and price are shown on a different page, say the cart page. Controls are also used for structural jobs, like validation, data access, security, creating master pages, and data manipulation. NET uses five types of web controls, which are: ASP. If the Checked attribute is set to true for multiple radio buttons in a group, then only the last one is considered as true.

Only HTTP cannot keep track of all the information coming from various pages. NET session state and server side infrastructure keeps track of the information collected globally over a session. NET runtime carries the page state to and from the server across page requests while generating ASP. NET server controls with a visual aspect are derived from the Web Control class and inherit all the properties, events, and methods of this class. Basic syntax of check box: These control let a user choose from one or more items from the list.

The traditional and server HTML controls have the following events that can execute a script when they are raised: The content file contains the HTML or ASP.

NET server controls allow calling client side code written using Java Script or VBScript. NET server controls use client side scripting to provide response to the users without posting back to the server. Apart from these scripts, the Button control has a property On Client Click, which allows executing client-side script, when the button is clicked.

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