List controls provide the user with a number of options to choose from. A user has a choice to select a single option or list of options. The ListBox control provided by Asp.net controls collection. The listbox control has a collection property which is known as items. You can click on the property and populate the ListBox with the data and the value you desire.

While populating the ListBox remember that the Text property of the ListBox is the text which will appear inside the it and the value is simple value. Usually we set the value to an integer which maps to some column in the database. Lets see how we can select a simple item in the ListBox control.

The listbox exposes the property of SelectedItem and SelectedValue which can be used to find the selected item or selected value. You can also set the SelectionMode of the ListBox to multiple which allows the user to select multiple items with the ctrl key being pressed while selecting. Here is a small piece of code you can use to find out all the selected items in the listbox.

The foreach loop will iterate the collection and if it finds the selected item it will assign to the string.

In the next tutorial we will see more advanced controls.  

Changes Text in the TextBox when the Button is clicked:

Lets make a small application that will change the text in the TextBox when the button is clicked.

As you see its very simple to raise and capture, capture and take action on the event.

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