看了很多文章,尝试了很多次总是进行不下去,整理一下,以便日后查看。
1、创建ASP.NET MVC项目(EFCodeFirst)
1.1、右键点击引用选择管理NuGet程序包下载MySql.Data.Entity.dll(有依懒项,会自动下载MySql.Data.dl 和 EntityFramework.dll)
1.2、修改Web.config文件(如下图)
2、创建类库(EFCodeFirst.DataAccess)
2.1、右键添加-->新建项-->选择数据-->选择ADO.NET实体数据模型-->空Code First模型(也可以不用这一步,但DatabaseAccess.cs文件需要自己创建)
2.1、右键点击引用选择管理NuGet程序包下载MySql.Data.Entity.dll(有依懒项,会自动下载MySql.Data.dl 如下图)
2.2、修改文件 DatabaseAccess.cs
修改之前:
修改之后:
代码如下:
namespace EFCodeFirst.DataAccess
{
using IdentityAuth.Common;
using IdentityAuth.Model.Sys;
using MySql.Data.MySqlClient;
using System;
using System.Data.Common;
using System.Data.Entity;
using System.Linq; public class DatabaseAccess : DbContext
{
#region 构造函数和初始化
private static string connectionStr { get; set; }
private static DbConnection GetConnection()
{
if (String.IsNullOrEmpty(connectionStr))
connectionStr = ConfigHelper.GetConnectionStr("EFCodeFirst"); if (String.IsNullOrEmpty(connectionStr))
throw new Exception("数据库连接字符串为空,请在Config文件里配置"); DbConnection dbConnection = new MySqlConnection() { ConnectionString = connectionStr };
return dbConnection;
} public DatabaseAccess() : base(DatabaseAccess.GetConnection(), true)
{
Database.SetInitializer<DatabaseAccess>(null);
}
#endregion #region 系统表
/// <summary>
/// 系统用户信息
/// </summary>
public DbSet<SysUserEntity> UserEntities { get; set; } /// <summary>
/// 角色信息
/// </summary>
public DbSet<SysRoleEntity> RoleEntities { get; set; } /// <summary>
/// 系统菜单信息
/// </summary>
public DbSet<SysMenuEntity> MenuEntities { get; set; } /// <summary>
/// 角色权限信息
/// </summary>
public DbSet<SysRoleAuthEntity> RoleAuthEntities { get; set; } /// <summary>
/// 角色用户信息
/// </summary>
public DbSet<SysRoleUserEntity> RoleUserEntities { get; set; } #endregion
}
}
2.3、修改App.config文件(如下图)
App.config文件如下:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
</configSections>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
<provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6, Version=6.10.8.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"></provider>
</providers>
</entityFramework>
<system.data>
<DbProviderFactories>
<remove invariant="MySql.Data.MySqlClient" />
<add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.10.8.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>
</system.data>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.6.1"/>
</startup>
</configuration>
3、迁移
3.1、打开程序包管理控制器,默认项目选择 EFCodeFirst.DataAccess(也就是CodeFirst迁移目录,如下图)
3.2、添加迁移配置 Enable-Migrations(生成以下文件并会出现错误,如图)
3.3、解决3.2出现的错误,修改生成文件 Configuration.cs(如下图)
代码如下:
namespace EFCodeFirst.DataAccess.Migrations
{
using System;
using System.Data.Common;
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Data.Entity.Migrations.History;
using System.Linq; internal sealed class Configuration : DbMigrationsConfiguration<EFCodeFirst.DataAccess.DatabaseAccess>
{
public Configuration()
{
AutomaticMigrationsEnabled = false;
SetSqlGenerator("MySql.Data.MySqlClient", new MySql.Data.Entity.MySqlMigrationSqlGenerator());
SetHistoryContextFactory("MySql.Data.MySqlClient", (conn, schema) => new MySqlHistoryContext(conn, schema));
} protected override void Seed(EFCodeFirst.DataAccess.DatabaseAccess context)
{
// This method will be called after migrating to the latest version. // You can use the DbSet<T>.AddOrUpdate() helper extension method
// to avoid creating duplicate seed data.
}
} public class MySqlHistoryContext : HistoryContext
{ public MySqlHistoryContext(DbConnection connection, string defaultSchema)
: base(connection, defaultSchema)
{} protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder); modelBuilder.Entity<HistoryRow>().Property(h => h.MigrationId).HasMaxLength().IsRequired();
modelBuilder.Entity<HistoryRow>().Property(h => h.ContextKey).HasMaxLength().IsRequired();
}
}
}
3.4、添加一个合并迁移命令行:Add-Migration [Name](eg:Add-Migration Add_Base_Table) Name 为一个合并的名称,自定义,最好不重复
3.5、生成SQL:Update-Database -Script(如果不需要SQL可不用执行)
3.6、迁移到数据库:Update-Database