Validating checkboxlist asp net control using javascript


18-Oct-2017 03:48

NET application codes can be written in any of the following languages: ASP. Basic syntax of text control: Specifies the type of text box.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. If you want to display text that does not change, you use the literal text. Label controls provide an easy way to display text which can be changed from one execution of a page to the next.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.

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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.

The following table shows some of the default events for common controls: This example includes a simple page with a label control and a button control on it. These controls contain a collection of List Item objects that could be referred to through the Items property of the control.