ASP.NET DropDownList Control
Definition and Usage
The DropDownList control is used to create a dropdown list.
Each selectable option in the DropDownList control is defined by a ListItem element!
Tip:This control supports data binding!
Property
| Property | Description | .NET |
|---|---|---|
| SelectedIndex | Optional index number | 1.0 |
| OnSelectedIndexChanged | The name of the function to be executed when the index of the selected item is changed. | 1.0 |
| runat | Specify that this control is a server control. It must be set to "server". | 1.0 |
ListControl Standard Properties
AppendDataBoundItems, AutoPostBack, CausesValidation, DataTextField, DataTextFormatString, DataValueField, Items, runat, SelectedIndex, SelectedItem, SelectedValue, TagKey, Text, ValidationGroup, OnSelectedIndexChanged
The ListControl control includes all basic functions of list controls. Controls that inherit from this control include: CheckBoxList, DropDownList, ListBox, and RadioButtonList controls.
For a complete description, please visit ListControl Standard Properties.
Web Control Standard Properties
AccessKey, Attributes, BackColor, BorderColor, BorderStyle, BorderWidth CssClass, Enabled, Font, EnableTheming, ForeColor, Height, IsEnabled SkinID, Style, TabIndex, ToolTip, Width
For a complete description, please visit Web Control Standard Properties.
Control Standard Properties
AppRelativeTemplateSourceDirectory, BindingContainer, ClientID, Controls EnableTheming, EnableViewState, ID, NamingContainer, Page, Parent, Site TemplateControl, TemplateSourceDirectory, UniqueID, Visible
For a complete description, please visitControl Standard Properties.
Example
- DropdownList
- In this example, we declare a DropDownList control in the .aspx file. Then we create an event handler that displays text and the selected item in the Label control when the Click event occurs.
