Using a User Control from Another Project

Question

I have built a user control in a project that I want to re-use in a separate project. I had seen similar attempts successfully accomplished by adding a reference to the original project and then registering the control via:

<%@ Register Assembly="AssemblyName" Namespace="AssemblyName.Namespace" TagPrefix="xxx" %>

I did something similar, compiling the original project and referencing it in the subsequent one . The control has an asp:Repeater control within it. I then registered my control as above and placed the control on my page like so (the control has a string property named prop):

<xxx:ControlName ID="ControlId" runat="server" prop="21" />

However when I launch the control in the subsequent project, I get a null reference exception and the application chokes. Am I doing this the wrong way? Is it mandatory that I have an .ascx file in the subsequent project?

Any and all help is appreciated.

Thanks,

pbr

Answer 1

Just as a follow up to this:

I did some further research and learned that the mark-up language (materials on the .ascx page) do not get compiled into the assembly. Therefore you must have the .ascx file within the project that calls it if there is any markup associated with the control.

In the properties dialogue I set up a post-build event that copies the .ascx file over to the subsequent project Controls file. I reference it as I would any normal User Control and everything works fine.

Hope this helps someone out there with a similar issue,

pbr