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Entity Framework 代码优先 实现数据库

二,引用dll:

    1、采用Nuget安装EF6.0.2;

    2、采用Nuget安装MySql.Data.Entity.EF6

    注意:要采用Nuget进行安装,否则可能会缺少相应的dll或者是配置信息

二、配置 web.config或app.config

    1、将entitframework节点替代为:

 <entityFramework codeConfigurationType="MySql.Data.Entity.MySqlEFConfiguration, MySql.Data.Entity.EF6">

    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework"/>

    <providers>

      <provider invariantName="MySql.Data.MySqlClient" type="MySql.Data.MySqlClient.MySqlProviderServices, MySql.Data.Entity.EF6" />

      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />

    </providers>

  </entityFramework>    


    2、添加 ConnectionString节点:

<connectionStrings>

    <add name="MyContext" connectionString="Data Source=localhost;port=3306;Initial Catalog=数据库名称;user id=Mysql的登录用户名;password=Mysql server密码;" providerName="MySql.Data.MySqlClient"/>  连接mySQL 数据库

 <add name="TestDB" connectionString="Data Source=.;Initial Catalog=MyTest;User ID=sa;Password=123456;" providerName="System.Data.SqlClient"/> MSSQL 数据库

  </connectionStrings>


三 建立模型

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace DBModel
{
     [Table("UserInfo")]
    public  partial class UserInfo
    {
        [Key]
        [Column(TypeName = "uniqueidentifier")]
         Guid id { get; set; }
        [Column(TypeName = "nvarchar")]
        [MaxLength(50)]
        string userName{get;set;}

        [Column(TypeName = "nvarchar")]
        [MaxLength(50)]
        [DataType(DataType.Password)]
        string password { get; set; }
    }

}






四 建立数据上下文

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.Entity;
using DBModel;
using System.Data.Entity.ModelConfiguration.Conventions;
using System.Data.Entity.Infrastructure;
namespace DB
{
    public partial class DBContext :DbContext
    {
        public DBContext()
            : base("name=TestDB")
        {
        }

        DbSet<UserInfo> UserInfo { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();//移除复数表名的契约    不允许将表名变为复数形式  默认为UserInfos            modelBuilder.Conventions.Remove<IncludeMetadataConvention>();//防止黑幕交易 要不然每次都要访问 EdmMetadata这个表
        }
    }
}








Entity Framework 代码优先 实现数据库