ComponentChangedEventArgs 类

定义

public ref class ComponentChangedEventArgs sealed : EventArgs

public sealed class ComponentChangedEventArgs : EventArgs

[System.Runtime.InteropServices.ComVisible(true)]
public sealed class ComponentChangedEventArgs : EventArgs

type ComponentChangedEventArgs = class
    inherit EventArgs

[<System.Runtime.InteropServices.ComVisible(true)>]
type ComponentChangedEventArgs = class
    inherit EventArgs

Public NotInheritable Class ComponentChangedEventArgs
Inherits EventArgs

继承

Object

EventArgs

ComponentChangedEventArgs

属性

ComVisibleAttribute

示例

以下示例演示如何创建 ComponentChangedEventArgs。

public:
   // This example method creates a ComponentChangedEventArgs using the specified arguments.
   // Typically, this type of event args is created by a design mode subsystem.
   ComponentChangedEventArgs^ CreateComponentChangedEventArgs( Object^ component, MemberDescriptor^ member, Object^ oldValue, Object^ newValue )
   {
      // Creates a component changed event args with the specified arguments.
      ComponentChangedEventArgs^ args = gcnew ComponentChangedEventArgs( component, member, oldValue, newValue );
      
      // The component that has changed:              args->Component
      // The member of the component that changed:    args->Member
      // The old value of the member:                 args->oldValue
      // The new value of the member:                 args->newValue
      return args;
   }

// This example method creates a ComponentChangedEventArgs using the specified arguments.
// Typically, this type of event args is created by a design mode subsystem.            
public ComponentChangedEventArgs CreateComponentChangedEventArgs(object component, MemberDescriptor member, object oldValue, object newValue)
{            
    // Creates a component changed event args with the specified arguments.
    ComponentChangedEventArgs args = new ComponentChangedEventArgs(component, member, oldValue, newValue);

    // The component that has changed:              args.Component
    // The member of the component that changed:    args.Member
    // The old value of the member:                 args.oldValue
    // The new value of the member:                 args.newValue

    return args;            
}

' This example method creates a ComponentChangedEventArgs using the specified arguments.
' Typically, this type of event args is created by a design mode subsystem.            
Public Function CreateComponentChangedEventArgs(ByVal component As Object, ByVal member As MemberDescriptor, ByVal oldValue As Object, ByVal newValue As Object) As ComponentChangedEventArgs
    ' Creates a component changed event args with the specified arguments.
    Dim args As New ComponentChangedEventArgs(component, member, oldValue, newValue)

    ' The component that has changed:              args.Component
    ' The member of the component that changed:    args.Member
    ' The old value of the member:                 args.oldValue
    ' The new value of the member:                 args.newValue
    Return args
End Function

注解

ComponentChangedEventArgs 提供事件的数据 ComponentChanged 。 事件 ComponentChanged 通知 IComponentChangeService 和注册的事件处理程序当前活动文档中的特定组件已更改。

提供 ComponentChangedEventArgs 以下信息：

• 指示 Component 已修改的组件的属性。

• 指示 Member 已更改的成员的属性。

• 指示 NewValue 成员的新值的属性。

• 指示 OldValue 成员的旧值的属性。

添加、删除或修改组件时，组件设计器通常会自动引发 ComponentChanged 事件。 ComponentChanged在窗体加载和卸载期间不会引发事件，因为此时需要更改。 组件设计器可能会在更改组件的属性后引发 ComponentChanged 事件;这可确保属性窗口将显示更新的属性。

继承者说明

如果将此类指定为另一个类的基类，则会发生编译器错误。

构造函数

属性

方法

适用于

另请参阅

• ComponentChanged
• ComponentChanging
• ComponentChangedEventHandler
• IComponentChangeService