Having issue calling value from grid item control

[cest]

I am having issues calling the asset_SN value from a grid that does have a value (see picture) and feel my syntax is wrong as it states there isnt an object and when I look at portion of file output it is blank in the debugger (attached error code).

Frontend:
<telerik:RadGrid ID="RadGrid" runat="server" RenderMode="Auto" AllowPaging="True"  OnItemDataBound="RadGrid_ItemDataBound" OnNeedDataSource="RadGrid_NeedDataSource" 
    OnItemCommand="RadGrid_ItemCommand" OnItemCreated="RadGrid_ItemCreated" OnDeleteCommand="RadGrid_ItemDeleted" AllowSorting="true" AllowFilteringByColumn="true" 
    FilterType="HeaderContext" EnableHeaderContextMenu="True" EnableHeaderContextFilterMenu="True">   



<telerik:GridBoundColumn DataField="asset_SN" FilterControlAltText="Filter asset_SN column" HeaderText="Serial Number" SortExpression="asset_SN" UniqueName="asset_SN"></telerik:GridBoundColumn>


Backend: 
Dim assetSN As String = TryCast(editedItem.FindControl("asset_SN"), TextBox).Text

Error:

System.NullReferenceException: 'Object reference not set to an instance of an object.'

TryCast(..., System.Web.UI.WebControls.TextBox) returned Nothing.

[Vasko]

Hello Christopher,

The reason you're getting null is because of the TextBox typecasting. Since this is the regular EditForms item (and not a template), FindControl will not work (it works only when templates are involved).

You can check the Accessing Controls in Edit/Insert Mode to see how to get the built-in controls of an edit item.

Regards,
Vasko
Progress Telerik