ConventionPropertyExtensions.SetBeforeSaveBehavior 方法

參考

定義

命名空間:: Microsoft.EntityFrameworkCore

組件:: Microsoft.EntityFrameworkCore.dll

套件:: Microsoft.EntityFrameworkCore v3.0.0

套件:: Microsoft.EntityFrameworkCore v3.1.0

套件:: Microsoft.EntityFrameworkCore v5.0.0

重要

部分資訊涉及發行前產品，在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊，不做任何明確或隱含的瑕疵擔保。

設定值，指出在實體儲存至資料庫之前，是否可以修改這個屬性。

如果為 Throw ，則在狀態中 Added 時，如果值指派給這個屬性，則會擲回例外狀況。

如果 Ignore 為，則會在處於狀態時 Added 忽略任何設定的值。

public static void SetBeforeSaveBehavior (this Microsoft.EntityFrameworkCore.Metadata.IConventionProperty property, Microsoft.EntityFrameworkCore.Metadata.PropertySaveBehavior? beforeSaveBehavior, bool fromDataAnnotation = false);

public static Microsoft.EntityFrameworkCore.Metadata.PropertySaveBehavior? SetBeforeSaveBehavior (this Microsoft.EntityFrameworkCore.Metadata.IConventionProperty property, Microsoft.EntityFrameworkCore.Metadata.PropertySaveBehavior? beforeSaveBehavior, bool fromDataAnnotation = false);

static member SetBeforeSaveBehavior : Microsoft.EntityFrameworkCore.Metadata.IConventionProperty * Nullable<Microsoft.EntityFrameworkCore.Metadata.PropertySaveBehavior> * bool -> unit

static member SetBeforeSaveBehavior : Microsoft.EntityFrameworkCore.Metadata.IConventionProperty * Nullable<Microsoft.EntityFrameworkCore.Metadata.PropertySaveBehavior> * bool -> Nullable<Microsoft.EntityFrameworkCore.Metadata.PropertySaveBehavior>

<Extension()>
Public Sub SetBeforeSaveBehavior (property As IConventionProperty, beforeSaveBehavior As Nullable(Of PropertySaveBehavior), Optional fromDataAnnotation As Boolean = false)

<Extension()>
Public Function SetBeforeSaveBehavior (property As IConventionProperty, beforeSaveBehavior As Nullable(Of PropertySaveBehavior), Optional fromDataAnnotation As Boolean = false) As Nullable(Of PropertySaveBehavior)