Object reference not set to an instance of an object.

Folks,

 
I am using RadControls for ASP.NET AJAX Q2 2009 SP1 with Visual Studio 2008 SP1.

I have a   Heirarchical Grid (

MasterTableView

  and  DetailTables  both uses FormTemplate). In DetailTables, I have a RadCombo Box. Is it possible:

1)    In RadGrid1_UpdateCommand/ RadGrid1_InsertCommand Events, capture the Template Values of City and ContactTitle into string Variables?  Neither City nor ContactTitle are DataTextField or  DataValueField of ComboBox?

void RadComboBox1_SelectedIndexChanged(object o, RadComboBoxSelectedIndexChangedEventArgs e)

{

}

telerik:RadGrid ID="RadGrid1" OnInsertCommand="RadGrid1_InsertCommand"

OnUpdateCommand = "RadGrid1_UpdateCommand" >

MasterTableView runat = "server" Name = "Master">

Beginning Block of Child DetailTable -->

DetailTables>

<telerik:GridTableView runat="server" Name = "Detail"

<ParentTableRelation>

...

</ParentTableRelation>

<Columns>

<telerik:GridBoundColumn DataField="ContactName" HeaderText="ContactName" HeaderStyle-Width="50%"

SortExpression="ContactName" UniqueName="ContactName" >

</telerik:GridBoundColumn>

....

</Columns>

EditFormSettings EditFormType="Template">

EditColumn UniqueName="EditCommandColumn1"></EditColumn>

<FormTemplate>

<table id="Table1">

<tr>

<td>

Contact Name

</td>

<td>

<telerik:RadComboBox runat="server"

ID="RadComboBox1"

DataTextField="ContactName"

DataValueField="ContactName"

HighlightTemplatedItems="true"

Height="190px"

Width="220px"

DropDownWidth="420px"

DataSourceID="SQLDataSource1" AutoPostBack="True"

onselectedindexchanged="RadComboBox1_SelectedIndexChanged"

SelectedValue='<%#Bind("ContactName") %>'>

<HeaderTemplate>

<ul>

<li class="col1">Contact Name</li>

<li class="col2">City</li>

<li class="col3">Title</li>

</ul>

</HeaderTemplate>

<ItemTemplate>

<ul>

<li class="col1"><%# DataBinder.Eval(Container.DataItem, "ContactName") %></li>

<li class="col2"><%# DataBinder.Eval(Container.DataItem, "City") %></li>

<li class="col3"><%# DataBinder.Eval(Container.DataItem, "ContactTitle") %></li>

</ul>

</ItemTemplate>

</telerik:RadComboBox>

</td>

<td colspan="2" style="font-size:small; z-index:0; font-family:Bookman Old Style; color:#669999">

<asp:Label ID="ComboBoxContactTitle" runat="server" Text="Contact Title"

Font-Underline="True">

</asp:Label>

</td>

</tr>

...

</table>

</FormTemplate>

</EditFormSettings>

</telerik:GridTableView>

DetailTables>

Ending Block of Child DetailTable -->

Beginning Block of MasterTableView -->

<Columns>

...

</Columns>

<EditFormSettings EditFormType="Template">

<FormTemplate>

...

</FormTemplate>

</EditFormSettings>

...

MasterTableView>

<!

Ending Block of MasterTableView -->

telerik:RadGrid>

asp:SqlDataSource ID="SqlDataSource1" runat="server"

ConnectionString="<%$ ConnectionStrings:SomeConnectionString %>"

SelectCommand="SELECT * FROM [Customers] ORDER BY City">

</asp:SqlDataSource>