MigrationBuilder.DropPrimaryKey(String, String, String) 方法

定義

命名空間:

Microsoft.EntityFrameworkCore.Migrations

組件:

Microsoft.EntityFrameworkCore.Relational.dll

套件:

Microsoft.EntityFrameworkCore.Relational v8.0.0

建置 ， DropPrimaryKeyOperation 以卸載現有的主鍵。

public virtual Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.DropPrimaryKeyOperation> DropPrimaryKey (string name, string table, string? schema = default);

abstract member DropPrimaryKey : string * string * string -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.DropPrimaryKeyOperation>
override this.DropPrimaryKey : string * string * string -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.DropPrimaryKeyOperation>

Public Overridable Function DropPrimaryKey (name As String, table As String, Optional schema As String = Nothing) As OperationBuilder(Of DropPrimaryKeyOperation)

參數

name

String

要卸載的主鍵條件約束名稱。

table

String

包含索引鍵的資料表。

schema

String

包含資料表的架構，或使用 null 預設架構。

傳回

OperationBuilder<DropPrimaryKeyOperation>

建置器，允許將批註新增至作業。

備註

如需詳細資訊和範例 ，請參閱資料庫移 轉。