I created my own .ascx control that sometimes I want to place inside another .ascx control because I want to be able to re-use the inner.ascx control in a variety of places inside the module.

In the pages that I want to place the inner.ascx page is simply have a <%@ Register TagPrefix="mhh" TagName="Inside" Src="inner.ascx" %>

and when I want the control I have

<mhh:Inside id="MyControl" runat="server"> </mhh:Inside>

In my code behind I have

Protected WithEvents MyControl as Inner

(I tried following a similar methodology to the way the DNN controls are created (ie User.ascx) to be reused in other controls.

I don't have any problems in DNN 3.x. My self made controls load up appropriately. However when I'm trying to load up these controls embedded inside another control I'm getting a DotNetNuke.Services.Exceptions.PageLoadException: Object reference not set to an instance of an object. ---> System.NullReferenceException: Object reference not set to an instance of an object. at DotNetNuke.Services.Exceptions.Exceptions.ProcessModuleLoadException(PortalModuleBase ctrlModule, Exception exc)

Can anyone shed some light on what I am doing wrong?

Thanks.

 

I do something similar to you but my control is compiled.  So, I just put my dll inside the dotnetnuke bin directory and have no problem making reference to it.

Here's my register code :
<%@ Register TagPrefix="DnnControls" Namespace="DnnControls" Assembly="DnnControls_v2" %>

Maybe you should consider compiling your control.

---

Olivier Dupuis
Aikidev - An Agile Programming Experience