Multiple items deselected in ListView and other subclasses of ListBox #63
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…nd other subclasses of ListBox would lose their selections if multiple items were selected.
punker76
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May 28, 2013
Multiple items deselected in ListView and other subclasses of ListBox
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Hi, first of all, many thanks for taking over this project. Here's a little pull request to fix a small bug: whenever I tried to select multiple items from a ListView and drag them, all the items would be deselected, except the single item I actually started dragging.
This was due to a bug in
ItemsControlExtensions.GetSelectedItems():This is too strict - the IsAssignableFromType() is round the wrong way (can you assign a base class to its subclass? no), so it fails to handle ListView and other subclasses of ListBox. My patch simply changes it to an is operator instead.