MigrationBuilder.DropCheckConstraint(String, String, String) 方法

定义

命名空间:

Microsoft.EntityFrameworkCore.Migrations

程序集:

Microsoft.EntityFrameworkCore.Relational.dll

包:

Microsoft.EntityFrameworkCore.Relational v9.0.0

Source:

MigrationBuilder.cs

生成 以DropCheckConstraintOperation删除现有检查约束。

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

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

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

参数

name

String

要删除检查约束的名称。

table

String

要删除检查约束的表的名称。

schema

String

包含检查约束的架构，或使用null默认架构。

返回

OperationBuilder<DropCheckConstraintOperation>

允许将批注添加到操作的生成器。

注解

有关详细信息和示例 ，请参阅数据库迁移 。