DirectoryCatalog.Changing 事件

定义

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

在目录正在更改时发生。

public:
 virtual event EventHandler<System::ComponentModel::Composition::Hosting::ComposablePartCatalogChangeEventArgs ^> ^ Changing;

public event EventHandler<System.ComponentModel.Composition.Hosting.ComposablePartCatalogChangeEventArgs> Changing;

public event EventHandler<System.ComponentModel.Composition.Hosting.ComposablePartCatalogChangeEventArgs>? Changing;

member this.Changing : EventHandler<System.ComponentModel.Composition.Hosting.ComposablePartCatalogChangeEventArgs>

Public Custom Event Changing As EventHandler(Of ComposablePartCatalogChangeEventArgs)

Public Event Changing As EventHandler(Of ComposablePartCatalogChangeEventArgs)

Changing