MigrationBuilder.DropUniqueConstraint(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 DropUniqueConstraintOperation 卸載現有的唯一條件約束。

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

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

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

參數

name

String

要卸載的條件約束名稱。

table

String

包含條件約束的資料表。

schema

String

包含資料表的架構，或使用 null 預設架構。

傳回

OperationBuilder<DropUniqueConstraintOperation>

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 。