derfsplat/MiniMVP

Designer Support?

dazinator opened this issue · 4 comments

dazinator commented

I tried to use this, but it appears to loose VS Form Designer support:

image

Is this something I am doing wrong?

elovelan commented

This is due to a limitation in the way that WinForms works. It does not support generic classes that inherit from Form. A work-around is to create a dummy class that inherits from the generic View class. This must be in a separate file:

Dummy:

public class DialogForIPresentSampleDialog : Dialog<IPresentSampleDialog> {}

Dialog:

public partial class SampleDialog : DialogForIPresentSampleDialog, ISampleDialogView
{
    public SampleDialog()
    {
        InitializeComponent();
    }
}

@derfsplat think this warrants a Readme update?

derfsplat commented

Hi Darrell, Eric's right- it's a bug in the winforms designer MS is not going to fix. The workaround does work, however it's not something I can bake into the framework since you have to be able to specify the T of your presenter on the view to get some of the magic to work.

Open to any bright ideas 😄 .

I'll update the readme in the meantime and provide a sample.

dazinator commented

Ok - I thought that would probably be the case :)

Before looking at this framework, I also came accross https://winformsmvp.codeplex.com/ which has the same limitation with the designer, and they have a couple of suggested workarounds. I think they do offer some non generic base classes if I have remembered correctly.