Hello,

I've noticed a problem concerning the valuelists which ultragridcolumn can have.

In my case I have a UltraTree where the user can choose a tablename.
Depending on the user's choice a dataset will be filled and set as datasource for a bindingsource.
Then this bindingsource will be set as the UltraGrid's datasource. Everything works fine.

But some of my tables have valuelists. I create them after setting the UltraGrid's datasource by calling a sub called "LoadvalueLists" which is running these steps for each needed valuelist:

1. Instancing and filling a datatable "dt"
2. Instancing a UltraDropDown "udd"
3. Setting udd.Datasource = dt
4. Setting udd.ValueMember = dt.Columns(0).ColumnName and udd.DsiplayMember = dt.Columns(1).ColumnName
5. Column.Valuelist = udd

When the user changes betwenn the tables the memory usage increases without ever giving the memory free so the memory gets overloaded after a time. I observed this behaviour by using a process explorer which shows me the momery usage of a certain process.

If I don't call "LoadValueLists" the memory usage increases and decreases again constantly. To prevent the memory usage increasing I can also run the following code before setting the new UltraGrid's datasource:

For Each Band As UltraGridBand In Me.UltragGrid1.DisplayLayout.Bands
     For Each Column As UltraGridColumn In Band.Columns
          If Column.ValueList IsNot Nothing Then
               TryCast(Column.ValueList, UltraDropDown).Dispose()
               Column.ValueList = Nothing
          End If
     Next
Next

This seems to me like a bug. The UltraGrid should not keep the Column's ValueList informations alive after his datasource has been changed.