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
        }
    }
}