Bind array list to dropdownlist in asp.net

Bind array list to dropdownlist in asp.net

In this topic we are going to see how to Bind array list to dropdownlist in asp.net .

The DropDownList control comes in handy when you start binding it to various data stores. The data stores can be arrays, database values, XML file values, or values found elsewhere. For an example of binding the DropDownList control, this next example looks at dynamically generating a DropDownList control from one of three available arrays.

Binding string array list to dropdownlist:-

C#

In this example, the second drop-down list is dynamically generated based upon the value selected from the first drop-down list. For instance, selecting Car from the first drop-down list dynamically creates a second drop-down list on the form that includes a list of available car selections.

This is possible because of the use of the AutoPostBack feature of the DropDownList control. When the AutoPostBack property is set to True, the method provided through the OnSelectedIndexChanged event is fired when a selection is made. In the example, the DropDownList1_SelectedIndexChanged event is fired, dynamically creating the second drop-down list.

In this method, the content of the second drop-down list is created in a string array and then bound to the second DropDownList control through the use of the DataSource property and the DataBind() method.