Related / Casacading Dropdownlists in a Grid

[Donna]

Does anyone know how to create related / casacading dropdownlists in a telerik grid? Can this be done?

[Princy]

Hello Donna,

You can get reference to the controls in grid and populate it depending on an option the user selects for another control in the grid itself. Try out the following example which shows how to populate a combobox based on the selection in another combobox in the grid:
aspx:

<telerik:GridTemplateColumn UniqueName="ContactTitle" HeaderText="ContactTitle">
     <ItemTemplate>
         <telerik:RadComboBox ID="RadComboBox1" AutoPostBack="true" runat="server" SelectedValue='<%# Bind("ContactTitle") %>' DataSourceID="SqlDataSource1" DataTextField="ContactTitle"  OnSelectedIndexChanged="RadComboBox1_SelectedIndexChanged">
         </telerik:RadComboBox>
     </ItemTemplate>
</telerik:GridTemplateColumn>

<telerik:GridTemplateColumn UniqueName="TemplateColumn">
     <ItemTemplate>
         <telerik:RadComboBox ID="RadComboBox2"  runat="server">
         </telerik:RadComboBox>
     </ItemTemplate>
</telerik:GridTemplateColumn>

c#:

 protected void RadComboBox1_SelectedIndexChanged(object o, RadComboBoxSelectedIndexChangedEventArgs e)
    {
        RadComboBox rdcbx = (RadComboBox)o;
        GridEditableItem item = rdcbx.NamingContainer as GridDataItem;
        RadComboBox ddList = eitem.FindControl("RadComboBox2") as RadComboBox;
        // change the data source for ddList here
         .....
    }

Thanks
Princy.