Question

I have a WinForms user control Host with a custom UI Editor.
Through that editor, a child control (Child) can be added to Host.

(The UI Editor creates Child and sets Child.Parent = Host)

Child is handled through a Holder<Child> helper class, which is set as Tag property of e.g. a ListViewItem.

The respective code – some of it, at least – gets added to the form: Holder is created, and set as Tag, which is enough to be created at runtime, too.

However, Child is not visible to the designer – it is displayed, but it can’t be selected, nor does it occur in the drop down list with controls for the parent form.

I would like to:

• see the Child control in the designer, so that I can modify properties
• get notified if the control is removed

Is this possible?

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[edit] Thanks all for your input. I’ve decided to skip the designer – I hoped to throw together something quickly, but apparently it requires more planning than I should allow myself to spend on it right now.

Answer 1

Usethis.Controls.Add(/*Instance of the child*/); on the host class. Then for the notification add event handler for the host’s ControlRemoved event (this.ControlRemoved += new ControlEventHandler(Host_ControlRemoved);).