UIElement.OnRender Method (DrawingContext)
.NET Framework (current version)
When overridden in a derived class, participates in rendering operations that are directed by the layout system. The rendering instructions for this element are not used directly when this method is invoked, and are instead preserved for later asynchronous use by layout and drawing.
Assembly: PresentationCore (in PresentationCore.dll)
abstract OnRender : drawingContext:DrawingContext -> unit override OnRender : drawingContext:DrawingContext -> unit
Parameters
- drawingContext
-
Type:
System.Windows.Media.DrawingContext
The drawing instructions for a specific element. This context is provided to the layout system.
Notes to Inheritors:
The OnRender method can be overridden to add further graphical elements (not previously defined in a logical tree) to a rendered element, such as effects or adorners. A DrawingContext object is passed as an argument, which provides methods for drawing shapes, text, images or videos.
.NET Framework
Available since 3.0
Available since 3.0
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