SqlServerMigrationsSqlGenerator.DropDefaultConstraint 方法

定义

命名空间:

Microsoft.EntityFrameworkCore.Migrations

程序集:

Microsoft.EntityFrameworkCore.SqlServer.dll

包:

Microsoft.EntityFrameworkCore.SqlServer v9.0.0

Source:

SqlServerMigrationsSqlGenerator.cs

生成 SQL 片段以删除列的默认约束。

protected virtual void DropDefaultConstraint (string? schema, string tableName, string columnName, Microsoft.EntityFrameworkCore.Migrations.MigrationCommandListBuilder builder);

abstract member DropDefaultConstraint : string * string * string * Microsoft.EntityFrameworkCore.Migrations.MigrationCommandListBuilder -> unit
override this.DropDefaultConstraint : string * string * string * Microsoft.EntityFrameworkCore.Migrations.MigrationCommandListBuilder -> unit

Protected Overridable Sub DropDefaultConstraint (schema As String, tableName As String, columnName As String, builder As MigrationCommandListBuilder)

参数

schema

String

包含表的架构。

tableName

String

包含列的表。

columnName

String

列。

builder

MigrationCommandListBuilder

用于添加 SQL 片段的命令生成器。