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MigrationBuilder.DropColumn(String, String, String) 方法

定義

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);
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

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

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