[Solved] RadComboBox with LoadOnDemand in Grid

[TPerry]

I have a RadGrid and one of my columns is Resource, which is a GridTemplateColumn which holds a RadComboBox utilizing LoadOnDemand.  I can get it to partially work.  If I insert a new record, the LoadOnDemand works fine and it saves the value of the ComboBox in my DB.  However, if I then Edit that line, I always get 'Selection out of Range.'  I'm guessing that this is because the ComboBox has no values in it yet.  So, in my ItemDataBound event, I add a new ComboBoxItem containing the Text and Values of the selected Resource.  My problem is that I get the error before it hits this event.  What am I missing?

Here's my ComboBox code:

<

 

telerik:GridTemplateColumn UniqueName="Resource" HeaderText="Resource" DataField="Name">

 

 

<ItemTemplate>

 

 

<asp:Label ID="lblResourceName" runat="server" Text='<%# Eval("ResourceName")%>' ></asp:Label>

 

 

</ItemTemplate>

 

 

<EditItemTemplate>

 

 

<telerik:RadComboBox ID="Resource" AllowCustomText="true" runat="server" Text='<%# Bind("Resource") %>'

 

 

Height="100px" EmptyMessage="Search..." SelectedValue='<%# Bind("Resource") %>'

 

 

EnableVirtualScrolling="true" DataTextField="Name" DataValueField="Resource"

 

 

EnableLoadOnDemand="true" OnItemsRequested="Resource_ItemsRequested" AppendDataBoundItems="true"

 

 

>

 

 

</telerik:RadComboBox>

 

 

</EditItemTemplate>

 

 

 

</telerik:GridTemplateColumn>

And here's my ItemDataBound event:

 

If

 

(TypeOf e.Item Is GridEditableItem AndAlso e.Item.IsInEditMode) Then

 

 

'Populates the Resource DDL with the selected Resource

 

 

 

 

 

Dim ResourceDDL As RadComboBox = CType(GridItem("Resource").FindControl("Resource"), RadComboBox)

 

 

Dim objBNF As New PBBRL.EntityClass.xBudgetNodeFees

 

objBNF.FetchUsingPK(BudgetNodeFeesID)

 

Dim ResourceID As String = objBNF.Resource

 

 

Dim ResourceItem As New RadComboBoxItem

 

ResourceItem.Text = ResourceID

ResourceItem.Value = ResourceID

ResourceItem.Selected =

True

 

 

 

 

ResourceDDL.Items.Add(ResourceItem)
End If

[Princy]

Hi,

Try populating the Combobox in the ItemRequested event of the RadCombox and see whether it is working. You can also refer the following online demo which demonstrates a RadComboBox nested inside a GridTemplateColumn.
Combo in Grid

Thanks
Princy

[Veselin Vasilev]

Hi,

Please find attached a sample project. You need to use a slightly different technique to achieve that,

I hope this helps.

Regards,
Veselin Vasilev
the Telerik team

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[TPerry]

Thank you!  Thank you!