How do I inherit from an abstract UserControl?

Question

If I have a class

abstract class DetailsForm : UserControl

then

AppDetailsForm : DetailsForm
BoxDetailsForm : DetailsForm

I can take advantage of inheritance to stick logic in DetailsForm.cs that applies to elements common among the tags in AppDetailsForm.aspx and BoxDetailsForm.aspx . These tags appear in both, in exactly the same place. There is duplicated header and footer code in AppDetailsForm.aspx and BoxDetailsForm.aspx that I'd rather stick in DetailsForm.cs .

The problem is I would need to stick a reference in DetailsForm.aspx that would refer to the content of the.aspx file in a child derived directly from that class.

However, currently, it only shows the content of AppDetailsForm.aspx or BoxDetailsForm.aspx , and ignores anything in DetailsForm.cs , so it seems like the reference to the other file should go AppDetailsForm.aspx → DetailsForm.cs and BoxDetailsForm.aspx → DetailsForm.cs .

I don't know how to do this, and I suspect I'm approaching this the wrong way.

Answer 1

I think Master pages are built for what you are trying to do.

Take a look at this link .