Hi,

UltraGrid crashes (shows red X) with simple scenario:

1. Set datasource with bollean column (click on button1 in my sample).

2. Use ValueList for this column:

        public static ValueList GetYesNoListForBool()
        {
            ValueList valueList = new ValueList();
            valueList.ValueListItems.Add(true, "Yes");
            valueList.ValueListItems.Add(false, "No");
            return valueList;
        }

        private void ultraGrid1_InitializeLayout(object sender, InitializeLayoutEventArgs e)
        {
            if (e.Layout.Bands[0].Columns.Exists("bool"))
            {
                UltraGridColumn column = e.Layout.Bands[0].Columns["bool"];
                column.FilterOperandStyle = FilterOperandStyle.DropDownList;
                ValueList valueList = GetYesNoListForBool();
                column.ValueList = valueList;
            }
        }

3. Select cell in boolean column in rowfilter in application.

4. Set datasource without bollean column (click on button2 in my sample).

Crash! :(

I attached sample project to this post.

How I can fix it?

Thanks.