Hello,

I have been looking into your requirement, however, since hiding or disabling items in UltraComoEditor is currently not provided out of the box I can suggest to modify the data that is bound to the list by adding or removing items from it depending on the grid's cell value. This could be done in the UltraGrid's BeforeCellListDropDown event that fires just before the drop-down for each cell is expanded. There we can remove all rows that have deleted value equals to true an in case the cell value is a category that is deleted we could add it to the data again.

  private void ultraGrid1_BeforeCellListDropDown(object sender, Infragistics.Win.UltraWinGrid.CancelableCellEventArgs e)
        {
 
            var cellValue = e.Cell.Value;
            for (int i = ((DataTable)ultraComboEditor1.DataSource).Rows.Count - 1; i >= 0; i--)
            {
                DataRow dr = ((DataTable)ultraComboEditor1.DataSource).Rows[i];
                if (dr.ItemArray[2].ToString() == "True")
                {
                    dr.Delete();
                }
 
            }
            ((DataTable)ultraComboEditor1.DataSource).AcceptChanges();
            if (cellValue != null)
            {
                var row = getRowIfTrue(cellValue.ToString());
                if(row != null)
                {
                    ((DataTable)ultraComboEditor1.DataSource).ImportRow(row);
                    ((DataTable)ultraComboEditor1.DataSource).DefaultView.Sort = "ID desc";
                }
            }
      
        }

Additionally, if you require to hide or disable the item, instead of modifying the data source, I can recommend using UltraCombo instead of UltraComboEditor. UltraCombo is like a WinGrid and the Rows within it can be disabled using the Activation property on the row or their hidden property could be changed.

I have attached a sample application, that uses the above approach.

Please test it on your side and let me know if I may be of any further assistance.

Sincerely,

Teodosia Hristodorova

Associate Software Developer