Dropdown Autopostback property true and update panel problem

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I use update panel in asp.net. In the update panel there is a dropdownlist which auto postback property is true. when I scroll the long page and select the dropdown item then the page go to the top of the page. But I have to show the page as existing. please help me.

Posted 26-Apr-14 18:29pm

Sumon562

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DamithSL · Answer 1 · 2014-04-26T18:42:00

Solution 1

the problem is when you select item on dropdownlist it will post back entire page.
set AsyncPostBackTrigger as below

ASP.NET

<Triggers> 
<asp:AsyncPostBackTrigger ControlID="DropDownList1" EventName="SelectedIndexChanged" /> 
</Triggers> 
</asp:UpdatePanel>

Posted 26-Apr-14 18:42pm

DamithSL

Updated 26-Apr-14 18:45pm

v2

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Sumon562 27-Apr-14 1:21am

I have used Trigger but it does not work