Sorry I wasn't clear but yes I did get it working. Thank you very much for the help.

Hi,

You lost me. Do you have it working now, or not? Your last post is not clear.

This code looks correct to me. If it's not working, then something must be resetting the Style on the cell after you are setting it here.

The exception you got could be because InitializeRow is firing before "List" or "Values" column has been added to the grid. This can happen if these are unbound columns that you are adding after the grid it bound. This is very easy to fix, though. Just check band.Columns.Exists and if the column does no exist, bail out of InitializeRow. The event will fire again when the column is added.

Thank yu for your help, i ended up using

I also tried this with zero errors but it did not work:

    Private Sub UltraGrid1_InitializeRow(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinGrid.InitializeRowEventArgs) Handles UltraGrid1.InitializeRow         
If e.Row.Band Is Me.UltraGrid1.DisplayLayout.Bands("Bottom") Then             
If e.Row.Cells("List").Value Is "" Then                 
e.Row.Cells("Values").Style = UltraWinGrid.ColumnStyle.DropDownList             
End If         
End If     
End Sub

I was actually setting the drop down when creating each row. The data I am being passed is parsed into arrays from XML files. This results in me setting each cell one at a time. Code looks something like this

 

reportName = UltraGrid1.DisplayLayout.Bands("Top").AddNew() 'add top level row to grid
reportName.Cells("Report").Value = array3(1, i) 'report name to new row
For k = 1 To array3(3, i) 'loop for amount set in parent array
parameterName = UltraGrid1.DisplayLayout.Bands("Bottom").AddNew() 'add bottom level row to grid    
parameterName.Cells("List").Value = array1(7, counter)
If Not parameterName.Cells("List").Value = "" Then        
 parameterName.Cells("Values").ValueList = UltraDropDown1
 parameterName.Cells("Values").Value = array1(8, counter)        
parameterName.Cells("Values").Style = UltraWinGrid.ColumnStyle.DropDownList    
 Else        
 parameterName.Cells("Values").Value = parameterName.Cells("HiddenVal").Value 'set for textbox        
parameterName.Cells("Values").Style = UltraWinGrid.ColumnStyle.Edit    
End If                
Next

 When I tried to write a InitializeRow event i was caught with "ArgumentException: Key not found: 'List' Parameter name: key"

Private Sub UltraGrid1_InitializeRow(ByVal sender As Object, ByVal e As Infragistics.Win.UltraWinGrid.InitializeRowEventArgs) Handles ultraGrid1.InitializeRow
If e.Row.Cells("List").Value = "" Then            
 UltraGrid1.DisplayLayout.Bands("Bottom").Columns("Values").Style = UltraWinGrid.ColumnStyle.DropDownList         
End If
End Sub

Okay. That's very easy.

grid.DisplayLayout.Bands[1].Columns["Values"].Style = ColumnStyle.DropDownList;

If you have to do this for some cells and not other, then use the InitializeRow event and set the Style property on the Cell to DropDownList. Presumably you are already using InitializeRow to apply the dropdown to the cell, so you would set the Style on the cell at the same time.