Used by the designer to remove properties from or add additional properties to the display in the Properties grid or to shadow properties of the associated control.
Assembly: System.Design (in System.Design.dll)
Control designers use methods that are derived from the ComponentDesigner.PreFilterProperties method to shadow various control properties with corresponding design-time properties that the designer implements, and to add properties to or remove properties from the Properties grid.Notes to Inheritors
Override the method to add properties to or change the attributes of properties in the design-time property collection. Be sure to call the base method before performing other processing.
The following code example shows how to override the method in a class that is inherited from the HierarchicalDataBoundControlDesigner class to change the Properties grid of the HierarchicalDataBoundControl control at design time. The example makes the NamingContainer property visible in the Properties grid.
' Shadow the control properties with design-time properties. Protected Overrides Sub PreFilterProperties( _ ByVal properties As IDictionary) Dim namingContainer As String = "NamingContainer" ' Call the base method first. MyBase.PreFilterProperties(properties) ' Make the NamingContainery visible in the Properties grid. Dim selectProp As PropertyDescriptor = _ CType(properties(namingContainer), PropertyDescriptor) properties(namingContainer) = _ TypeDescriptor.CreateProperty(selectProp.ComponentType, _ selectProp, BrowsableAttribute.Yes) End Sub ' PreFilterProperties
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.