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POHow do I build a paged ItemsControl or Panel with a repeating header?
 

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  1. POHow do I build a paged ItemsControl or Panel with a repeating header?
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    <p>I'm trying to build a Panel or ItemsControl that will display items in the form of:</p> <p>Header 1</p> <ul> <li>Sub Item 1</li> <li>Sub item 2</li> <li>Sub Item 3</li> </ul> <p>Header 2</p> <ul> <li>Sub Item 1</li> <li>Sub item 2</li> </ul> <p>This is easy enough, but the catch here is that I need to be able to split the items in a Paged fashion. Based on the height of the control, whatever does not fit will be on the next Page (and so on). If a split occurs between subitems, I need to re-display the corresponding header on the next page as well.</p> <p>I made some progress working with MeasureOverride and ArrangeOverride but I keep running into dead-ends. It's really frustrating because this is something that is computationally trivial but a nightmare to accomplish in WPF/Silverlight. If you have ever worked with reporting packages, the concept is very similar to this.</p> <p>I keep coming back to the fact that I can't determine the height until after I have added the children to the control (using Dispatcher.BeginInvoke).</p> <p>Does anyone have any suggestions for accomplishing this? Thanks in advance!</p> <hr> <p><strong>Edit</strong></p> <p><a href="https://stackoverflow.com/questions/840161/wpf-observablecollection-and-listboxitem-datatemplate-generation-problem">[WPF] ObservableCollection and ListBoxItem DataTemplate generation problem</a></p> <p>This above link is very similar to what mdm20 has suggested, but I am still stuck. Everytime I try to get the ActualHeight, it returns 0. Additionally, the ItemContainerGenerator in Silverlight 3 returns null for the container unless I wrap the call in a Dispatcher.BeginInvoke operation.</p>
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