How to inherit a partial class from user control to other one?

Question

I've a problem with two user controls, first of all I've a user control named "Base" and I want to inherit it from another user control named "MyControl" but the "Base" control is a partial class and the user control "MyControl" just have a public class, so I use a partial class in "MyControl", and I use an ElementHost to show "MyControl" but I've the error "Cannot implicity convert type MyControl to System.Windows.UIElement".
I try to add "MyControl" as a Child but it shows that error.
Help!

Edit: The clases looks like:

public partial class Base : UserControl 
{
}  
public partial class MyControl : Base  
{  
}

And I want to do something like this:

public addControl() 
{  
    ElementHost _host = new ElementHost();  
    _host.Dock = Dockstyle.Fill;  
    _host.Child = _myControl;  
    panel.Control.Add(_host);
}

The error is at _host.Child = _myControl;. At this point the object _myControl is initialized.

Include code to illustrate this structure. You can strip out the insides, just show the class definitions and possibly constructors if you don't think anything else is related. — Gary, Jan 27 '17 at 15:19
NOTE: Partial is used to define a single class across multiple files. This is nothing to do with inheritance. — Andez, Jan 27 '17 at 15:39

score 0 · Answer 1 · answered Jan 27 '17 at 15:25

Does it look something like?

public partial class Base : UIElement
{
}

public class myControl : Base
{
}

I'm not sure what you mean by

and I use an ElementHost

however, my guess is that you are trying to cast myControl as a ElementHost, but it isn't one. Or myControl doesn't implement something that is required from UIElement.

Let me know if that helps.

How to inherit a partial class from user control to other one?

1 Answers1