Execute server side code on ModalPopupExtender okcontrolid clicked
问题 I am using ASP.NET and C#. I want to popup this little screen, then when the OK button is clicked, I want to update the main screen based on the input to the popup. Sounds like it should be a regular thing. Is it possible, and if so, how? <cc1:modalpopupextender id="ModalPopupExtender1" runat="server" cancelcontrolid="btnCancel" okcontrolid="btnOkay" targetcontrolid="txtCosCodeExpCode" popupcontrolid="Panel1" popupdraghandlecontrolid="PopupHeader" drag="true" backgroundcssclass="ModalPopupBG"