how to open modal popup extender from code behind

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<cc1:ModalPopupExtender ID="mdllogin" TargetControlID="linklogin" PopupControlID="popUpPanel" BackgroundCssClass="modalBackground" CancelControlID="btnclose" runat="server">
                   </cc1:ModalPopupExtender>

iam trying to open in my calling a method

C#

public void login()
       {
           
           mdllogin.Show();
       }

but it is giving error as object reference not set an object

Posted 26-Nov-13 1:37am

teja sai ravi

Updated 26-Nov-13 1:38am

v2

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Herman<T>.Instance 26-Nov-13 7:39am

is your popUpPanel in a hidden DIV?

teja sai ravi 26-Nov-13 7:45am

thanks for your reply...yes it is a hidden div

demouser743 26-Nov-13 9:29am

You can check here http://www.codeproject.com/Tips/215040/ModalPopupExtender-from-Server-Side-Code

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Nagar.Anand · Answer 1 · 2013-12-18T19:54:00

use behaviorId of modal popup extender

VB

cc1:ModalPopupExtender ID="mdllogin" BehaviorId="modal1" TargetControlID="linklogin" PopupControlID="popUpPanel" BackgroundCssClass="modalBackground" CancelControlID="btnclose" runat="server">
                   </cc1:ModalPopupExtender>

C#

public void login()
       {

           modal1.Show();
       }