Export chart inside a collapsed panel fails

[Ahmed Moussa]

Hi,
We have a dashboard with multiple RadPanelTab controls.
When trying to export all the charts to a PDF file using RadDocument, I've found that only the charts that have been previousliy "viewed" (that is, it's panel expanded) export correctly.
If I expand the panels programatically, then I get the "Dialogs must be user initiated" error, because of the time it takes to expand / collapse all the panels.
And if I try to do that after the ShowDialog() method of the SaveFileDialog control is called, then the images are corrupted or incomplete.

Is there any way to workaround these limitations?

Cheers,

[Yavor]

Hello Simon Kendall,

RadPanelbar loads only items that are currently expanded. After you expand them they exist in the visual tree and can be printed without problem. You can expand all items initially using ExpandAll() method and all of your charts will be ready for printing. If you wish to have all your charts collapsed initially you can collapse them on the ItemPrepared event like this:

void panelBar_ItemPrepared(object sender, RadTreeViewItemPreparedEventArgs e)
{
    RadPanelBarItem item = e.PreparedItem as RadPanelBarItem;
    Dispatcher.BeginInvoke(() => { item.IsExpanded = false; });
}

I have attached a sample application that demonstrates this approach.
Hope this helps! All the best,
Yavor Ivanov
the Telerik team