Thank you, It worked.
Only now am having another problem:
In the same gridGroupingControl is also possible to make grouping and filtering.
When not collated the width of the items are the Filter column width.
Only when it is grouped, the filter of the first column the width of the list items are smaller than the width of the column.
What do I do to keep the size of the column width?
segue um imagem do problema:
Tank
filter_aa0343c6.zip
