No InsertItem Template in Grid

[Grey]

Hi,

I've customized a RadGrid so that my Category field can be selected from a dropdownlist.

I've done this via the following code in the 'EditItem' template for my ProductCategoryName Template column
As shown below

<telerik:GridTemplateColumn DataField="ProductCategoryName"
            DefaultInsertValue="" HeaderText="Category"
            SortExpression="ProductCategoryName" UniqueName="ProductCategoryName">
            <EditItemTemplate>          
                    
           <asp:DropDownList ID="DropDownList1" runat="server" DataSourceID="SqlDataSourceCategories" DataTextField="CategoryName" DataValueField="CategoryName" SelectedValue='<%# Bind("ProductCategoryName") %>'>
           </asp:DropDownList>        
                    
                    
            </EditItemTemplate>

My problem is that it appears that the RadGRid does not have an <InsertItemTemplate> and instead just uses whetever is in the
<EditItem> Template when one is in in Insert mode.

This, naturally means that I get the following error...

'DropDownList1' has a SelectedValue which is invalid because it does not exist in the list of items.
Parameter name: value

Would anyone be able to provide me with a solution for this problem ?

[Radoslav]

Hello Grey,

Please check out the following documentation article which elaborates on the known reasons for error messages:
http://www.telerik.com/help/aspnet-ajax/grderrormessages.html ('DropDownList' has a SelectedValue which is invalid because it does not exist in the list of items section)

Additionally I am sending you a simple example which demonstrates how to achieve the desired functionality. Please check it out and let me know if it helps you.

Kind regards,
Radoslav
the Telerik team