Live Chat Icon For mobile
Live Chat Icon

How can I have the control designer create the custom editor by calling the constructor with the additional parameters rather than the default constructor

Platform: WinForms| Category: Controls

You can do this by creating the editor yourself rather than allowing
TypeDescriptor to do it:


1) Shadow the property you care about in your designer...

	protected override void PreFilterProperties(IDictionaryProperties props) 
	{
   		PropertyDescriptor basePD = props['MyProperty'];
   		props['MyProperty'] = new EditorPropertyDescriptor(basePD);
	}

2) Create a property descriptor that 'wraps' the original descriptor

	private class EditorPropertyDescriptor : PropertyDescriptor 
	{
    	private PropertyDescriptor basePD;
    	public EditorPropertyDescriptor(PropertyDescriptor base) 
		{
        	this.basePD = base;
   		}

    	// now, for each property and method, just delegate to the base...
    	public override  TypeConverter Converter 
		{
        	get { return basePD.Converter;  }
    	}

    	public override bool CanResetValue(object comp) 
		{
        	return basePD.CanResetValue(comp);
   		}
	

		// and finally, implement GetEditor to create your special one...

3) create your editor by hand when it’s asked for

   		public override object GetEditor(Type editorBaseType) 
		{
    		if (editorBaseType == typeof(UITypeEditor)) 
			{
            	return new MyEditor(Param1, param2, param3);
        	}
        	return basePD.GetEditor(editorBaseType);
    	}
	}

(from sburke_online@microsoft..nospam..com on microsoft.public.dotnet.framework.windowsforms)

Share with

Share on twitter
Share on facebook
Share on linkedin

Related FAQs

Couldn't find the FAQs you're looking for?

Please submit your question and answer.