[How Do I:] Use the ASP.NET AJAX DropDown Control?

With the DropDown control extender from the ASP.NET AJAX Control Toolkit, you can present the user with a drop-down list of options that trigger a partial-page update elsewhere on the Web page. The option selected by the user is passed to the server, allowing your server-side code to process the selection before completing the partial-page update.

Presented by Joe Stagner

Duration: 11 minutes, 51 seconds

Date: 30 March 2007

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Comments : 10

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vasireddybharathreddy : On July 28, 2008 3:59 PM said:

Hi,

If I want to change the backcolor/forecolor of the label

"Select an option" how can i do that. I tried all the options, but i am unable to change the backcolor. Can any one please tell me how to do that exactly.

cv_vikram : On August 06, 2008 2:48 PM said:

Very good tutorial.....thanks

alexanderhowell : On August 14, 2008 6:42 AM said:

Shame they don't work inside bound controls... :(

"The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>)."

Source File: C:\dev\AjaxControlToolkit\ExtenderBase\ScriptObjectBuilder. cs Line: 295

qasimali84 : On September 24, 2008 6:42 AM said:

I have developed website in VS 2005 and recently I make this website Ajax Enabled. I Put Script Manager in Master Page and added UpdatePanel in .aspx page using that Master Page.

My dropdownlist AsyncPostBackTrigger deos not work.

Thanks in Advance

My Code is as follow.

Width="160px" DataTextField="TypeDesc" DataValueField="TypeOfPatientId" OnSelectedIndexChanged="drpTypeOfPatient_SelectedIndexChang ed" AutoPostBack="True">

</asp:DropDownList>

</ContentTemplate>

<asp:AsyncPostBackTrigger ControlID="drpTypeOfPatient" EventName="SelectedIndexChanged" />

</Triggers>

</asp:UpdatePanel>

Please help me.