Code for validating login textbox in
The code behind file contains the class definition. NET control tags and literals to form the structure of the page.The ASP tag for a button control: Some events cause the form to be posted back to the server immediately, these are called the postback events. For example, the change events or selection events such as Text Box. The default event for the Page object is Load event. For example, default event for the button control is the Click event. Common properties of List Item Collection: A radio button list presents a list of mutually exclusive options.
For example, when a user clicks a button the 'Click' event is generated. Each List Item object represents one item in the list.
It consists of a large number of controls such as text boxes, buttons, and labels for assembling, configuring, and manipulating code to create HTML pages. NET web forms extend the event-driven model of interaction to the web applications. The Http Server Utility class provides numerous properties and methods to perform various jobs. It represents the values and properties of the HTTP request that makes the page loading into the browser. NET, the response object does not play any vital role in sending HTML text to the client, because the server-side controls have nested, object oriented methods for rendering themselves. The following table shows the inherited properties, common to all server controls: Let us look at a particular server control - a tree view control. Edit each of the nodes using the Tree view node editor as shown: Once you have created the nodes, it looks like the following in design view: The Auto Format... A check box displays a single option that the user can either check or uncheck and radio buttons present a group of options from which the user can select just one option.
NET applications are compiled codes, written using the extensible and reusable components or objects present in . These codes can use the entire hierarchy of classes in . NET is used to produce interactive, data-driven web applications over the internet. Single Line creates a standard text box, Multi LIne creates a text box that accepts more than one line of text and the Password causes the characters that are entered to be masked. The mostly used attribute for a label control is 'Text', which implies the text displayed on the label.
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.