Finding a Control within a RadGrid Edit Template

I’ve recently needed to incorporate a RadGrid in which my edit template contained two RadComboBoxes. Depending on the value of my first combo box, the second would be updated with different sets of data. The problem I ran into was how to connect to this second combo box so I can bind it with data.

Here’s the basic premise:

RadComboBox combo1 = (RadComboBox)sender;

GridEditFormItem editItem = (GridEditFormItem)combo1.NamingContainer;

RadComboBox combo2 = (RadComboBox)editItem.FindControl("RadComboBox2");

And the more complete code sample here:

ASPX --

<telerik:RadGrid ID="RadGrid1" runat="server">

  <MasterTableView EditMode="EditForms">

    <EditFormSettings EditFormType="Template">

      <FormTemplate>

        <telerik:RadComboBox ID="RadComboBox1" runat="server" AutoPostBack="true" OnSelectedIndexChanged="RadComboBox1_OnSelectedIndexChanged">

          <Items>

            <telerik:RadComboBoxItem Text="Selection 1" Value="1" />

            <telerik:RadComboBoxItem Text="Selection 2" Value="2" />

          </Items>

        </telerik:RadComboBox>

        <telerik:RadComboBox ID="RadComboBox2" runat="server">

        </telerik:RadComboBox>

      </FormTemplate>

    </EditFormSettings>

  </MasterTableView>

</telerik:RadGrid>

Code-behind --

protected void RadComboBox1_OnSelectedIndexChanged(object sender, RadComboBoxSelectedIndexChangedEventArgs e)

{

    RadComboBox combo1 = (RadComboBox)sender;

    GridEditFormItem editItem = (GridEditFormItem)combo1.NamingContainer;

    RadComboBox combo2 = (RadComboBox)editItem.FindControl("RadComboBox2");

    switch(e.Value)

    {    

       case "1":

          combo2.Items.Add(new RadComboBoxItem("Test"));

          break;

       case "2":

          combo2.Items.Add(new RadComboBoxItem("Test Again"));

          break;

    }

}

Good luck :)