Set property value when Delete key is pressed in PropertyGrid

Question

I am currently working on a project that hosts the WinForms designer. I use a PropertyGrid to display the control properties of controls that are deleted on DesignSurface .

I created a UITypeEditor to change the values ​​of my properties for user controls.

How can I reset the value of the null property when the Delete key is pressed in the PropertyGrid .

Answer 1

This is handled in the PropertyDescriptor .

You override ResetValue and CanResetValue .

Answer 2

Actually, all you have to do is add the attribute "DefaultValue" to the property and indicate that the default value is null.

Example:

 [DefaultValue(typeof(Image), null)] public Image MyLittlePicture { get; set; }