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.For handling events, there are in-built attributes and event handlers. Items in a List Item Collection are numbered from 0.Event handler is coded to respond to an event, and take appropriate action on it. When the items into a list box are loaded using strings like: lstcolor. Add("Blue"), then both the Text and Value properties of the list item are set to the string value you specify.
The server processes the output of the client actions and triggers the reactions. The session state is the collective information obtained from various pages the user visited and worked with, i.e., the overall session state. The page itself is instantiated as a control object. In this tutorial we will explore the Server object, the Request object, and the Response object. The following table provides some noteworthy properties of the Request object: The Response object represents the server's response to the client request. Using these tools, the users can enter data, make selections and indicate their preferences. The code behind the file should look like this: using System; using System. If you want check box or radio button to be selected when the form is initially displayed, set its Checked attribute to true. The HTML controls such as the header tags, anchor tags, and input elements are not processed by the server but are sent to the browser for display. Linq; namespace eventdemo Execute the page to see the effects. The HTML server controls are basically the standard HTML controls enhanced to enable server side processing.By default, Visual Studio creates an event handler by including a Handles clause on the Sub procedure. To set it differently you must create a list item object and then add that item to the collection.This clause names the control and event that the procedure handles. Some events are not posted back to the server immediately, these are called non-postback events. The nonpostback events could be made to post back immediately by setting their Auto Post Back property to true. The List Item Collection Editor is used to add item to a drop-down list or list box. To display the collection editor, select edit item from the smart tag menu, or select the control and then click the ellipsis button from the Item property in the properties window.