[Solved] Filter RadComboBox Column in RadGrid with ID instead of Name

[ABC]

I have the following Column in my RadGrid,

<Telerik:DDLGridColumn UniqueName="ProductType"
                    Query="select Name AS ProductType, ID AS ProductTypeID From ProductTypes WHERE RetailerID={1}"
                    GetRetailerIDFromSession="True"
                    DataField="ProductType" DataValueField="ProductTypeID"
                    HeaderText="ProductType" SortExpression="ProductType">
                    <ItemTemplate>
                        <%# Eval("ProductType")%>
                    </ItemTemplate>
</Telerik:DDLGridColumn>

This is the code,

    

public class DDLGridColumn: GridTemplateColumn
    {
        protected override void SetupFilterControls(System.Web.UI.WebControls.TableCell cell)
        {
            RadComboBox rcBox = new RadComboBox();
            rcBox.ID = this.UniqueName + "_rcbox";
            rcBox.AutoPostBack = true;
            rcBox.DataTextField = this.DataField;
            rcBox.DataValueField = DataValueField ?? this.DataField;
            rcBox.SelectedIndexChanged += rcBox_SelectedIndexChanged;
            rcBox.Width = FilterControlWidth;
            string query = query = string.Format(this.Query, this.DataField);
            DataTable table = DBLayer.GetDataTable(query, CommandType.Text);
            DataRow row = table.NewRow();
            table.Rows.InsertAt(row, 0);
            rcBox.DataSource = table;
            cell.Controls.Add(rcBox);
        }
        private void rcBox_SelectedIndexChanged(object sender, Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs e)
        {
            ((GridFilteringItem)(((RadComboBox)sender).Parent.Parent)).FireCommandEvent("Filter", new Pair());
        }
        protected override void SetCurrentFilterValueToControl(TableCell cell)
        {
            if (!(this.CurrentFilterValue == ""))
            {
                ((RadComboBox)cell.Controls[0]).Items.FindItemByValue(this.CurrentFilterValue).Selected = true;
            }
        }
        protected override string GetCurrentFilterValueFromControl(TableCell cell)
        {
            string currentValue = ((RadComboBox)cell.Controls[0]).SelectedItem.Value;
            this.CurrentFilterFunction = (currentValue != "") ? GridKnownFunction.EqualTo : GridKnownFunction.NoFilter;
            return currentValue;
        }
    }

I want the RadComboBox to filter with ID, but on UI it should show name. Is it possible