Hi grakgem,

It has been a while since your post, however in case you still need assistance I would be glad to help.

The scenario you have described may occur if you are configuring an UltraGridColumn object and afterwards adding it to the grid , by using for instance:

        UltraGridColumn test = new UltraGridColumn();
        test.Type = ColumnType.DropDownList;
        test.ValueList.ValueListItems.Add("item1", "item1");
        test.ValueList.ValueListItems.Add("item2", "item2");
        test.Header.Caption = "DropDown";

        UltraWebGrid1.Columns.Add(test);

In order for your dropDown value list to persist through postbacks, you should first add a column to the grid, and then configure its valueListItems:

    protected void UltraWebGrid1_InitializeLayout(object sender, Infragistics.WebUI.UltraWebGrid.LayoutEventArgs e)
    {
        UltraWebGrid1.Columns.Add("DropDownCol");
        UltraWebGrid1.Columns.FromKey("DropDownCol").Type = Infragistics.WebUI.UltraWebGrid.ColumnType.DropDownList;
        UltraWebGrid1.Columns.FromKey("DropDownCol").ValueList.ValueListItems.Add("1", "1");
        UltraWebGrid1.Columns.FromKey("DropDownCol").ValueList.ValueListItems.Add("2", "2");
        UltraWebGrid1.Columns.FromKey("DropDownCol").ValueList.ValueListItems.Add("3", "3");
        UltraWebGrid1.Columns.FromKey("DropDownCol").Header.Caption = "DropDown";
    }

Please contact me if you have any questions.

Best Regards,

Petar Ivanov
Developer Support Engineer
Infragistics, Inc.
http://es.infragistics.com/support