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Once the user interface of the web form was built, it was time to add functionality to the application. This application displays a message when one of the menu items is clicked, and displays a greeting, using a name entered in the TextBox control, when the button is clicked. You can add event handlers by selecting the Event tab on the Object Inspector and double-clicking one of the events in the list. However, this application uses default event handlers, so there's an easier way. Double-clicking the button automatically creates a callback method for the Button control's Click event, as shown in Listing 1.
Listing 1 Button Click Event Callback Generated by C#Builder
private void btnSayHello_Click(object sender, System.EventArgs e)
{
this.lblInfo.Text = "Hello " + this.txtName.Text;
}
The code in Listing 1 shows the callback method in the code-behind file generated by C#Builder when the Button control was double-clicked on the Designer Surface. Since I had previously modified the ID property of the Button control in the Object Inspector, the method was generated with a name that's more meaningful than the default button1.
TIP
The same process used to code a callback for the Button control can be used with the LinkButton controls.