Persistent filter in GridViewMultiColumnComboBoxColumn grid

[Test]

Let's say :
1. In my gridView I selected first cell in a row (which is a GridViewMultiColumnComboBoxColumn)
2. I go and prefiltered my items in "sub" grid using filters
3. Choose one of rows
4. Value was copied to "main" grid ...perfect!

until now everything is fine but...

4. Now I go to next row (in my "main" gridView) and expect that after opening first cell (GridViewMultiColumnComboBoxColumn) items will be prefiltered but they are not.

How can I achive such a behavior?



I was trying to save my FilterDescriptor (from previous row) and add it to new row on event GridView_PreparedEdit like:

myCell.ItemsSourceProvider.CollectionView.FilterDescriptors.Add(dataPointNameFilter);   

but then I saw (Call Stack) that GridViewMultiColumnComboBoxColumn if there is a FilterDescription filter (at least one) set, just before drop down with "sub" grid will be shown is raising FilterDescriptors_CollectionChanged where he cleaning FilterDescriptor anyway and therefore reset previous filter state.

[Dinko | Tech Support Engineer]

Hello John,

Thank you for the provided details. 

I am currently investigating this behavior and I need more time. I will contact you again tomorrow with further information about your case.

Regards,
Dinko
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[Dinko | Tech Support Engineer]

Hi John,

Thank you for your patience.

I need to point out that in GridViewMultiColumnComboBoxColumn, filters in one cell will not be used for another cell. The control does not support this behavior. After debugging some time, I have found a possible solution to transfer the filters from one dropdown content to another. I have prepared a sample project which demonstrates this approach. I will recommend you to test this approach further, so it covers all your scenarios.

Regards,
Dinko
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