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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.
Consider the simple page: tags contain the hidden fields which store the view state and validation information. NET provides three types of button control: Text box controls are typically used to accept input from the user.
For example, consider the HTML input control: All ASP.
They are specifically converted to a server control by adding the attribute runat="server" and adding an id attribute to make them available for server-side processing.
This way, the server becomes aware of the overall application state and operates in a two-tiered connected way. NET component model provides various building blocks of ASP. Basically it is an object model, which describes: All ASP. These lists can be loaded either by code or by the List Item Collection editor.
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.
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.