Let's say I have an abstract class IA, with subclasses A1, A2, A3.
For each subclass, I had a page with a FormView to insert/edit/view, with code specific to that class.
The templates for insert/edit/view are all very similar, so it was mostly cut & paste, and
the compiler had no problem that there were controls with
the same IDs in
the different templates.
Something like this:
<asp:FormView>
<InsertItemTemplate>
<asp:Label id="Label1" />
</InsertItemTemplate>
<EditItemTemplate>
<asp:Label id="Label1" />
</EdittItemTemplate>
</asp:FormView>
Much of
the code/markup ended up being redundant across
the pages, so I refactored it to use a master/content format, with
the master page having content placeholders for
the insert/edit/view templates.
Master page:
<asp:FormView>
<InsertItemTemplate>
<asp:ContentPlaceHolder ID="InsertItemTemplate"></asp:ContentPlaceHolder>
</InsertItemTemplate>
<EditItemTemplate>
<asp:ContentPlaceHolder ID="EditItemTemplate"></asp:ContentPlaceHolder>
</EdittItemTemplate>
</asp:FormView>
And content page:
<asp:Content ContentPlaceHolderID="InsertItemTemplate">
<asp:Label id="Label1" />
</asp:Content>
<asp:Content ContentPlaceHolderID="EditItemTemplate">
<asp:Label id="Label1" />
</asp:Content>
In
the content page templates, I'm doing
the exact same thing I was doing before I refactored, but now
the compiler is blowing up with
the error BC30260: 'Label1' is already declared as 'Protected WithEvents Label1 As System.Web.UI.WebControls.Label' in this class.
For some reason, it's not separating
the controls in
the content blocks
the same way it did when they were in
the templates, even though
the content placeholders are in
the individual templates.
Is there a way around this, other than to rename all my controls?
