[It is important to understand that the ISite technique below only works at design time. Because ContainerControl is public and gets assigned a value VisualStudio will write initialization code that sets it at run-time. Site is set at run-time, but you can't get ContainerControl from it]
Here's an article that describes how to do it for a non-visual component.
Basically you need to add a property ContainerControl to your component:
public ContainerControl ContainerControl
{
get { return _containerControl; }
set { _containerControl = value; }
}
private ContainerControl _containerControl = null;
and override the Site property:
public override ISite Site
{
get { return base.Site; }
set
{
base.Site = value;
if (value == null)
{
return;
}
IDesignerHost host = value.GetService(
typeof(IDesignerHost)) as IDesignerHost;
if (host != null)
{
IComponent componentHost = host.RootComponent;
if (componentHost is ContainerControl)
{
ContainerControl = componentHost as ContainerControl;
}
}
}
}
If you do this, the ContainerControl will be initialized to reference the containing form by the designer. The linked article explains it in more detail.
A good way to see how to do things is to look at the implementation of Types in the .NET Framework that have behaviour similar to what you want with a tool such as Lutz Reflector. In this case, System.Windows.Forms.ErrorProvider is a good example to look at: a Component that needs to know its containing Form.
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…