Popup Control for ASP.NET Web Forms - How to show and hide a pop-up window on the server side

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This example demonstrates how to change the Popup Control's visibility on the server. Use this approach to process data on the server before users open and/or after they close a pop-up window. Otherwise, we recommend that you open and hide the pop-up window on the client to reduce server round trips.

Overview

Set the ASPxPopupControl's server-side ShowOnPageLoad property value to true to display the default popup window at the client. If the popup control has multiple popup windows, use a PopupWindow's server-side ShowOnPageLoad property to specify visibility of this window at the client.

In this example, the Popup Control has a single window that contains a textbox and the OK and Cancel buttons. The control updates its ShowOnPageLoad property value as follows:

• Sets to true after you click the Edit... button on a form
• Sets to false after you click the OK button on the pop-up window

Files to Look At

• Default.aspx (VB: Default.aspx)
• Default.aspx.cs (VB: Default.aspx.vb)

Documentation

• How to: Show the Default Window
• How to: Show and Hide Windows

More Examples

• Popup Control for ASP.NET Web Forms - How to add buttons to a popup window
• Popup Control for ASP.NET Web Forms - How to show the popup control