Use client side validation or wrap your panel with an update panel and call the Show() method of the modal extender to show the modal from the code-behind.
I tried putting the UpdatePanel around the whole Panel, but I just get the An extender can't be in a different UpdatePanel than the control it extends. Error. – keyboardP Feb 3 '10 at 16:35 You shouldn't put your extender in a different UpdatePanel.
If you're using a nested UpdatePanel, you need to move the extender out from the inner UpdatePanel, or remove the inner UpdatePanel. – Paulus E Kurniawan Feb 4 '10 at 23:18.
I managed to solve the problem without using the updatepanel. Instead, I handled the CreateUserWizard's 'Submit' button's onClick event. Here, I got the instance of the ModalPopupExtender existing within the CreateUserWizard control and called its Show() method.
I left the ModalPopup declaration within the tags so that the Cancel button can still be accessed by it.
I'm using the ModalPopupExtender control from the AJAX toolkit. This control extends a panel which contains a CreateUserWizard control. However, the validation of the CreateUserWizard control causes a postback to the server, which closes the popup.
I'd like the popup to remain open, even after the postback. From what I can gather, I should be using an UpdatePanel. However, I can't seem to get it working.
I can't follow this structure because the ModalPopupExtender relies on a button which is contained within the CreateUserWizard control. Therefore, it has to be added within the tags. I would like the submit button, built into the CreateUserWizard control, to force an update of the panel.
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