How to: Add ListBox Web Server Controls to a Web Forms Page (Visual Studio)
The process of adding aWeb server control consists primarily of setting options for how items should be displayed and whether users can select multiple items.
To add a ListBox control to a Web Forms page
From the Standard tab of the Toolbox, drag the ListBox control onto the page.
In the Properties window, set the following properties:
Set to specify how many items should be displayed at once.
You can also set theproperty to a pixel value. If you do, it takes precedence over the value of the Rows property. However, not all browsers support the Height property, so you should set the Rows property also.
Set to Single or Multiple to specify how many items users can select.
Create items for the control in one of the following ways:
By creating them as individual items. For details, see.
By data binding the control. For details, see.