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take place, it sends a message, which is displayed by the label control. These controls contain a collection of List Item objects that could be referred to through the Items property of the control. NET directives are instructions to specify optional settings, such as registering a custom control and page language.When the button is clicked, the Button_Click event is raised and that also sends a message to be displayed on the label. These settings describe how the web forms (.aspx) or user controls (.ascx) pages are processed by the . The syntax for declaring a directive is: In this section, we will just introduce the ASP. 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. NET application codes can be written in any of the following languages: ASP. Basic syntax of text control: Specifies the type of text box.
For example, when a user clicks a button the 'Click' event is generated. Each List Item object represents one item in the list.
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.
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.
In this chapter, we will discuss the basic controls available in ASP. A text box control can accept one or more lines of text depending upon the settings of the Text Mode attribute.