I have aModalPopupExtender with two DropdownLists. I want to populate the second dropdownlist dynamically base on the user selection in the first dropdownlist. Once user selects values from both dropdown lists, then I want to postback the entire page.
But the OnSelectedIndexChanged event of the dropdownlist is not firing whenever the selection is changed.
Is this possible withinModalPopupExtender? Appreciate your help.
You may want AutoPostBack="true" and an UpdatePanel.
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