IDesignerFilter 接口

定义

public interface class IDesignerFilter

public interface IDesignerFilter

type IDesignerFilter = interface

Public Interface IDesignerFilter

派生

System.ComponentModel.Design.ComponentDesigner

System.Web.UI.Design.WebFormsRootDesigner

System.Workflow.ComponentModel.Design.ActivityDesigner

示例

以下示例演示了在设计时选择设计器控件时向属性窗口添加设计器属性的 PreFilterProperties的替代。 ControlDesigner有关使用该IDesignerFilter接口的完整设计器示例，请参阅该类的示例。

protected:
   [ReflectionPermission(SecurityAction::Demand, Flags=ReflectionPermissionFlag::MemberAccess)]
   virtual void PreFilterProperties( System::Collections::IDictionary^ properties ) override
   {
      properties->Add( "OutlineColor", TypeDescriptor::CreateProperty( TestControlDesigner::typeid, "OutlineColor", System::Drawing::Color::typeid, nullptr ) );
   }

// Adds a property to this designer's control at design time 
// that indicates the outline color to use. 
// The DesignOnlyAttribute ensures that the OutlineColor
// property is not serialized by the designer.
protected override void PreFilterProperties(System.Collections.IDictionary properties)
{
    PropertyDescriptor pd = TypeDescriptor.CreateProperty(
        typeof(ExampleControlDesigner), 
        "OutlineColor",
        typeof(System.Drawing.Color),
        new Attribute[] { new DesignOnlyAttribute(true) });

    properties.Add("OutlineColor", pd);
}

' Adds a property to this designer's control at design time 
' that indicates the outline color to use.
' The DesignOnlyAttribute ensures that the OutlineColor
' property is not serialized by the designer.
Protected Overrides Sub PreFilterProperties(ByVal properties As System.Collections.IDictionary)
    Dim pd As PropertyDescriptor = TypeDescriptor.CreateProperty( _
    GetType(ExampleControlDesigner), _
    "OutlineColor", _
    GetType(System.Drawing.Color), _
    New Attribute() {New DesignOnlyAttribute(True)})

    properties.Add("OutlineColor", pd)
End Sub

注解

IDesignerFilter 使设计器能够筛选其关联组件通过 a TypeDescriptor公开的属性、属性和事件描述符集。 此接口的方法，其名称以名称开头 Pre 的方法在名称以 Post开头的方法之前立即调用。

如果要添加属性、事件或属性描述符，请使用或PreFilterAttributesPreFilterEventsPreFilterProperties方法。

如果要更改或删除属性、事件或属性描述符，请使用或PostFilterAttributesPostFilterEventsPostFilterProperties方法。

另请参阅

• ITypeDescriptorFilterService
• TypeDescriptor