How To Prevent Postback Of Page When I Select Value In One Dropdown List?

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I have one webpage that contains two dropdownlists and few other controls.
when i select value in one dropdownlist then other dropdownlist will be binding from database based on first dropdownlist selected value.so,when i selecting dropdownlist total page is postbacking so,how to prevent that total page postback.

Posted 7-May-14 0:58am

Avinash502

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Darshan.Pa · Answer 1 · 2014-05-07T01:02:00

Solution 1

You can put your code in ajax update panel.

C#

<asp:UpdatePanel ID="UpdatePanel2" runat="server">
   <ContentTemplate>
      //your html
   </ContentTemplate> 
</asp:UpdatePanel>

Posted 7-May-14 1:02am

Darshan.Pa

Updated 7-May-14 1:06am

v2

Jinu _George · Answer 2 · 2014-05-07T01:06:00

Solution 2

Either use Ajax update panel or bind the dropdown list using Classic ajax method.

Posted 7-May-14 1:06am

Jinu _George

Telstra · Answer 3 · 2014-05-07T01:07:00

place all the dropdownlist which are firing a post back event in updatepanel's content tempalte field control of ajax.
for example refer

C#

<asp:scriptmanager enablepartialrendering="true" xmlns:asp="#unknown">
 ID="ScriptManager1" runat="server"></asp:scriptmanager>
 <div>
 <asp:updatepanel id="UpdatePanel1" runat="server" xmlns:asp="#unknown">
 UpdateMode="Conditional"> <contenttemplate>
  <asp:dropdownlist id="NetworkCodeDropDown" autopostback="true" onselectedindexchanged="DropDown_Changed" runat="server"> </asp:dropdownlist>
  </contenttemplate>
  </asp:updatepanel>