I have an UltraWinGrid with a filter row at the top. Some string colums have a dropdown with filters. 

On BeforeRowFilterDropDown I have the following code:

if (typeof(string) == e.Column.DataType){
  FilterCondition condition = new FilterCondition(e.Column, FilterComparisionOperator.Match, "^[A-Za-z]");

  e.ValueList.ValueListItems.Insert(0, condition, "All");                
}

This works fine. The problem is what happens when I select the 'All' filter, and take the focus away from the filter cell after that. The cell text changes from 'All' to the FilterCondition.CompareValue, in this case ^[A-Za-z]. I've found out that this is the ToString from FilterCondition. But how does the cell display text get overwritten in the first place? And what can I do to avoid it? I've tried to inherit FilterCondition and override the ToString, but no luck. 

I've also found an internal string displayTextOverride; in ColumnFilter that makes me wonder a bit about what's going on.

Regards,
Trond