共用方式為

ObjectStateEntry.IEntityChangeTracker.EntityMemberChanging 方法

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[此頁面專屬於 Entity Framework 第 6 版。最新版本可從 'Entity Framework' NuGet 套件取得。如需 Entity Framework 的詳細資訊，請參閱 msdn.com/data/ef。]

用來報告純量實體屬性將會變更。呼叫此方法時會快取所指定屬性的目前值。

命名空間：  System.Data.Entity.Core.Objects
組件：  EntityFramework (在 EntityFramework.dll 中)

語法

'宣告
<SuppressMessageAttribute("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes")> _
Private Sub EntityMemberChanging ( _
    entityMemberName As String _
) Implements IEntityChangeTracker.EntityMemberChanging
'用途
Dim instance As ObjectStateEntry 
Dim entityMemberName As String 

CType(instance, IEntityChangeTracker).EntityMemberChanging(entityMemberName)

[SuppressMessageAttribute("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes")]
void IEntityChangeTracker.EntityMemberChanging(
    string entityMemberName
)

[SuppressMessageAttribute(L"Microsoft.Design", L"CA1033:InterfaceMethodsShouldBeCallableByChildTypes")]
private:
virtual void EntityMemberChanging(
    String^ entityMemberName
) sealed = IEntityChangeTracker::EntityMemberChanging

[<SuppressMessageAttribute("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes")>]
private abstract EntityMemberChanging : 
        entityMemberName:string -> unit 
[<SuppressMessageAttribute("Microsoft.Design", "CA1033:InterfaceMethodsShouldBeCallableByChildTypes")>]
private override EntityMemberChanging : 
        entityMemberName:string -> unit

JScript supports the use of explicit interface implementations, but not the declarations of new ones.

參數

  • entityMemberName
    類型：System.String
    將要變更的實體屬性名稱

Implements

IEntityChangeTracker.EntityMemberChanging(String)

請參閱

參考

ObjectStateEntry 類別

System.Data.Entity.Core.Objects 命名空間