MigrationBuilder.DropColumn(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 v9.0.0

來源:

MigrationBuilder.cs

建置 以 DropColumnOperation 卸載現有的資料行。

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

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

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

參數

name

String

要卸載的資料行名稱。

table

String

包含資料行的資料表。

schema

String

包含資料表的架構，或使用 null 預設架構。

傳回

OperationBuilder<DropColumnOperation>

允許將批註加入至作業的產生器。

備註

如需詳細資訊和範例 ，請參閱資料庫移轉 。