Ajax Control Toolkit
DropDown Demonstration
Hover over the text below and click to select an option:

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DropDown Description

DropDown is an ASP.NET AJAX extender that can be attached to almost any ASP.NET control to provide a SharePoint-style drop-down menu. The displayed menu is merely another panel or control. In the above sample the drop-down is a Panel which contains LinkButtons. The drop-down is activated by left- or right-clicking the attached control. If the behavior is attached to a Hyperlink or LinkButton, clicking on the link itself will operate normally.

DropDown Properties

The control above is initialized with this code. The italic properties are optional:

<ajaxToolkit:DropDownExtender runat="server" ID="DDE"
    DropDownControlID="DropPanel" />
  • TargetControlID - The ID of the control which needs a drop-down.
  • DropDownControlID - The ID of the control which will be displayed as the dropdown.
  • Animations - Generic animations for the DropDown extender. See the Using Animations walkthrough and Animation Reference for more details.
    • OnShow - The OnShow animation will be played each time the dropdown is displayed. The dropdown will be positioned correctly but hidden. The animation can use <HideAction Visible="true" /> to display the dropdown along with any other visual effects.
    • OnHide - The OnHide animation will be played each time the dropdown is hidden.

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