RadCombox Not Found In RadGrid

[johnson lim]

I have 2 radcombobox in radgrid  , radcombobox A and radcombobox B.
The the grid is in add record mode in some situation , radcombobox B content are based on the selection on radcombobox A.

My problem is under the situation where the radcombobox B is not bind to any data, i can't find the radcombobox B by the coding below:
radCombo2 = CType(editItem.FindControl("ddlModuleParentGC"), RadComboBox)radCombo2 = CType(editItem.FindControl("ddlModuleParentGC"), RadComboBox)

My question is as below:
(1).Since the radcombobox B content is based on selection on  radcombobox A , does anyone know how to bind the data to the radcombobox B when the radgrid first go into add record mode? I think this will solve the problem.Pls correct me if i am wrong.

(2) My coding is as below
RadComboBox A=ddlAppID
RadComboBox B= ddlModuleParentGC

Public Sub BindSecondCombo(ByVal sender As Object, ByVal e As Telerik.Web.UI.RadComboBoxSelectedIndexChangedEventArgs)

        Dim radCombo1 As RadComboBox
        Dim radCombo2 As RadComboBox
        Dim editItem As GridDataInsertItem


        radCombo1 = CType(sender, RadComboBox)
        editItem = CType(radCombo1.NamingContainer, GridDataInsertItem)



        radCombo2 = CType(editItem.FindControl("ddlModuleParentGC"), RadComboBox)

        If radCombo2 Is Nothing = False Then
            radCombo2.ClearSelection()
            radCombo2.DataSource = getRecordByType(7, radCombo1.SelectedValue, "", "", "", "", "")
            radCombo2.DataTextField = "modulename"
            radCombo2.DataValueField = "moduleid"
            radCombo2.DataBind()
            radCombo2.DataSource = getRecordByType(7, radCombo1.SelectedValue, "", "", "", "", "")
            radCombo2.DataTextField = "modulename"
            radCombo2.DataValueField = "moduleid"

            radCombo2.DataBind()
        End If
    End Sub

My code behind is

 <ajax:GridTemplateColumn  UniqueName="GCAppId" HeaderText="Application" SortExpression="AppId" >
                    <HeaderStyle Width="100px" />
                    <ItemTemplate>
                        <asp:Label ID="lblGCAppId" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "AppId") %>'></asp:Label>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:Label ID="lblGCEAppId" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "AppId") %>'></asp:Label>


                 <ajax:RadComboBox runat="server" ID="ddlAppId" DataSource="<%# getApp() %>"  OnSelectedIndexChanged="BindSecondCombo"
                    DataTextField="Selection"  AutoPostBack ="true"
                    DataValueField="AppId"
                    SelectedValue='<%# DataBinder.Eval(Container.DataItem, "AppId") %>'></ajax:RadComboBox>



                    </EditItemTemplate>
                </ajax:GridTemplateColumn>


                <ajax:GridTemplateColumn  UniqueName="GCModuleParent" HeaderText="Module Parent" SortExpression="ModuleParent" >
                    <HeaderStyle Width="100px" />
                    <ItemTemplate>

                        <asp:Label ID="lblModuleParent" runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "ModuleParent") %>'></asp:Label>
                    </ItemTemplate>

                    <EditItemTemplate>

                       <ajax:RadComboBox runat="server" ID="ddlModuleParentGC" ></ajax:RadComboBox>
                    <asp:textbox ID="txtModuleParent"  runat="server" Text='<%# DataBinder.Eval(Container.DataItem, "ModuleParent") %>'></asp:textbox>

                    </EditItemTemplate>
                </ajax:GridTemplateColumn>

[Princy]

Hi Johnson,

Your code will work if you are using "InPlace" EditMode. If you are using EditMode as "EditForms" then you have to use the GridEditFormInsertItem object for accessing controls rather than GridDataInsertItem. Try the code shown below for accessing RadComboBox in insert mode:

VB:

protected void BindSecondCombo(object sender, EventArgs e) {    Dim radCombo1 As RadComboBox

Dim editItem As GridEditFormInsertItem

radCombo1 = CType(sender, RadComboBox)

editInsertItem = CType(radCombo1.NamingContainer, GridEditFormInsertItem)

radCombo2 = CType(editInsertItem.FindControl("combo2"), RadComboBox)       ... }

Regards
Princy.

[johnson lim]

Got it, Thanks!!!