ReferenceReferenceBuilder.IsRequired(Boolean) 方法

  • 參考

定義

命名空間:
Microsoft.EntityFrameworkCore.Metadata.Builders
組件:
Microsoft.EntityFrameworkCore.dll
套件:
Microsoft.EntityFrameworkCore v1.0.6
套件:
Microsoft.EntityFrameworkCore v1.1.6
套件:
Microsoft.EntityFrameworkCore v2.0.3
套件:
Microsoft.EntityFrameworkCore v2.1.11
套件:
Microsoft.EntityFrameworkCore v2.2.6
套件:
Microsoft.EntityFrameworkCore v3.0.0
套件:
Microsoft.EntityFrameworkCore v3.1.0
套件:
Microsoft.EntityFrameworkCore v5.0.0
套件:
Microsoft.EntityFrameworkCore v6.0.0
套件:
Microsoft.EntityFrameworkCore v7.0.0
套件:
Microsoft.EntityFrameworkCore v8.0.0

設定這是否為必要關聯性 (，亦即是否可以) 指派 null 外鍵屬性 () 。

public virtual Microsoft.EntityFrameworkCore.Metadata.Builders.ReferenceReferenceBuilder IsRequired (bool required = true);
abstract member IsRequired : bool -> Microsoft.EntityFrameworkCore.Metadata.Builders.ReferenceReferenceBuilder
override this.IsRequired : bool -> Microsoft.EntityFrameworkCore.Metadata.Builders.ReferenceReferenceBuilder
Public Overridable Function IsRequired (Optional required As Boolean = true) As ReferenceReferenceBuilder

參數

required
Boolean

值，指出這是否為必要關聯性。

傳回

ReferenceReferenceBuilder

相同的產生器實例，以便鏈結多個組態呼叫。

適用於