Question

I have a database schema as follows:

FailureItem
---------------
FailureID int foreign key references Failure (FailureID)
DatabaseID int NULL foreign key references Items (DatabaseID)
FailureDescription varchar(200)

Item
---------------
DatabaseID int primary key identity(1,1)
ItemDescription varchar(200)

I am using linq to bind this to a gridview as follows:

Dim items as List(Of FailureItems) =
    context.FailureItems.include("Item").where(function(x) x.FailureID = _failureID)



<asp:GridView ID="gv1" runat="server">
    <Columns>
        <asp:BoundField DataField="databaseID" Visible="false" />
        <asp:BoundField DataField="FailureDescription" headertext="Failure Description" />
        <asp:BoundField DataField="Item.ItemDescription" headertext="Item Description" />
    </Columns>
</asp:GridView>

This works perfectly on my development machine. When I release this onto azure, I get the error “A field or property with the name ‘Item.ItemDescription’ was not found on the selected data source.” What am I doing wrong?

Answer 1

I ended up changing the code to the following, which worked:

Dim items =
    (from fi in context.FailureItems
     where(fi.FailureID = _failureID)
     select new with {
         fi.databaseID,
         fi.FailureDescription,
         ItemDescription = If(fi.Item isnot nothing, fi.Item.ItemDescription, nothing)
     }).ToList