I display a gridview in a ModalPopupExtender. When the screen resolution is to small, the pop-up is to big to all be displayed on the page.
I just want to add scroll
I just found this.
ModalPopupExtender does not show scroll bar
it was still not working, but it was because I use a masterpage, so I solved this using the ClientID.
(note: to center that inner asp:panel vertically, the only thing I found was to put it into a Table cell using style="vertical-align:middle".
I also need set OptionSelectionTable's height using JavaScript because height="100%" fail with some browser.)
I also had to add the HorizontalAlign="Center" and ScrollBars="Auto" and to the Panel ID="OptionSelectionPanel" (the modalpopup's PopupControlID).
I moved the CssClass="modalTextBox" to an inner asp:panel and restored the HorizontalAlign="Left".
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