问题
I created SubCtrl inheriting UserControl. It has no code. I created then Ctrl, which also inherits UserControl. It has a SubCtrl in it and its only code means to expose it publicly so it appears in the property list of Ctrl:
public subctrl.SubCtrl SUBCTRL
{
get { return this.subCtrl1; }
}
Then I created a simple Form project which only has a Ctrl in it and no code. As I wanted, SUBCTRL appears in the property list of Ctrl so I can change things. I changed the background color (say, to red), and the subctrl turned red in the designer.
But magically, when I run the project, it turns back to the standard gray. It appears that no code is generated in Form1.Designer.cs to change SUBCTRL's back color to red. If I write it by hand, it works, but that's not what I want. It should be automatic, obviously.
The Ctrl, on the other hand, behaves normally. The code is generated and everything works happily.
What's wrong with the subcontrol?
回答1:
Add [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)] to the property.
来源：https://stackoverflow.com/questions/3701142/designer-does-not-generate-code-for-a-property-of-a-subcontrol-why