Create a new website and drag a label control and a button control on it from the control tool box. Set the Text property of the Button control as 'Click'. NET directives and we will use most of these directives throughout the tutorials. The basic syntax of Application directive is: The Assembly directive links an assembly to the page or the application at parse time.
Using the properties window, set the IDs of the controls as .lblmessage. The markup file (.aspx): using System; using System. The Application directive defines application-specific attributes. This could appear either in the file for application-wide linking, in the page file, a user control file for linking to a page or user control.
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.
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.
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.
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.
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.