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Fail to set value more than once on XamMultiColumnComboEditor

I have an issue using XamMultiColumnComboEditor v16.1 within a DataTemplate.

<DataTemplate DataType="{x:Type fields:HistoryClientInfoFieldViewModel}">

<ig:XamMultiColumnComboEditor ItemsSource="{Binding Values}"
<ig:TextComboColumn HeaderText="Name" Key="Name"/>
<!--<ig:TextComboColumn HeaderText="OrderPlacer" Key="OrderPlacer"/>-->


First when setting the focus on the element there is an exception 

exception thrown: 'System.InvalidOperationException' in PresentationCore.dll

Additional information: This Visual is not connected to a PresentationSource.

When attempting to set the value on the second time a null reference exception occurs.

Using  the control inside a UserControl seems to work for some reason.

Any idea what is going wrong?


No Data
  • 34510
    Offline posted

    Hi Etienne,

    That's an interesting error.  How are you using that DataTemplate?  I see it has a DataType set which means it will automatically apply where HistoryClientInfoFieldViewModel is used but what parent control is expected to use this DataTemplate?  For example, I tried creating a ListView control and used that DataTemplate for each list item but did not produce any exception when focusing via Mouse click or Tabbing to it.  I tested using the last service release for 16.1 (16.1.20161.2231).

    Also, do you have a stack trace for the error?  I'm interested to see what method calls in the XamMultiColumnComboEditor are triggering the exception.