EF6配合MySQL或MSSQL(CodeFirst模式)配置指引

    public class DataModelContext : DbContext
    {
        public DataModelContext()
            : base("DataModelContext")//web.config中connectionstring的名字
        {
        }

        public DbSet<Contract> Contracts { get; set; }
        public DbSet<DeliveryNote> DeliveryNotes { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            //指定单数形式的表名
            modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
            //物理表名添加xx前綴
            modelBuilder.Types().Configure(f => f.ToTable("xx" + f.ClrType.Name));
        }
    }

    public class DataModelInitializer : DropCreateDatabaseIfModelChanges<DataModelContext> // CreateDatabaseIfNotExists<DataModelContext>
    {
        protected override void Seed(DataModelContext context)
        {
            var contracts = new List<Contract>
            {
                new Contract{ BillNo = "PO20150201-001", BillDate=new DateTime(2015,  2,  1), TotalPrice=9876543.21M, Supplier = "Microsoft"},
                new Contract{ BillNo = "PO20141230-088", BillDate=new DateTime(2014, 12, 30), TotalPrice=1234567.89M, Supplier = "Oracle"},
            };
            context.Contracts.AddRange(contracts);
            context.SaveChanges();//可以分次提交，也可以最后一次性提交给数据库

            var deliveries = new List<DeliveryNote>
            {
                new DeliveryNote{ BillNo = string.Format("DN{0:yyyyMMdd}-006", DateTime.Today), TotalPrice=445566M, Contract=contracts.First(), Checker="张三"},
            };
            context.DeliveryNotes.AddRange(deliveries);
            context.SaveChanges();//可以分次提交，也可以最后一次性提交给数据库
        }

    }

<?xml version="1.0" encoding="utf-8"?>
<!--注意：此项目为动态库，所以此配置文件内容仅供作为范本使用，实际的WPF或ASP.NET项目可从此文件复制配置内容进行修改-->
<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>
  <!--MySQL启用下面一行-->
  <entityFramework codeConfigurationType="MySql.Data.Entity.MySqlEFConfiguration, MySql.Data.Entity.EF6">
  <!--SQL SERVER 启用下面一行-->
  <!--entityFramework-->
    <contexts>
      <!--通过设置disableDatabaseInitialization="true"，可以禁止数据库初始化操作-->
      <context type="EF6CodeFirstMySQL.Model.DataModelContext,EF6CodeFirstMySQL.Model" disableDatabaseInitialization="false">
        <databaseInitializer type="EF6CodeFirstMySQL.Model.DataModelInitializer,EF6CodeFirstMySQL.Model"></databaseInitializer>
      </context>
    </contexts>
    <!--MySQL启用下面一段配置项-->
    <defaultConnectionFactory type="MySql.Data.Entity.MySqlConnectionFactory, MySql.Data.Entity.EF6">
      <parameters>
        <parameter value="v11.0" />
      </parameters>
    </defaultConnectionFactory>
    <!--SQL SERVER 启用下面一行-->
    <!--defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" /-->
    <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=6.9.5.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"></provider>
    </providers>
  </entityFramework>
  <connectionStrings>
    <!--MySQL启用下面一行-->
    <add name="DataModelContext" connectionString="Data Source=localhost;port=3306;Initial Catalog=EF6CodeFirstDemo;user id=root;password=123456;" providerName="MySql.Data.MySqlClient" />
    <!--SQL SERVER 启用下面一行，注意数据库文件路径中使用了|DataDirectory|宏变量，该变量只在ASP.NET项目中有效-->
    <!--add name="DataModelContext" connectionString="Data Source=.;database=EF6CodeFirstDemo;uid=sa;pwd=123456;AttachDBFilename=|DataDirectory|\XantFlowDB.mdf;" providerName="System.Data.SqlClient"/-->
  </connectionStrings>

  <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=6.9.5.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
    </DbProviderFactories>
  </system.data>
</configuration>

        static void Main(string[] args)
        {
            using(var ctx = new DataModelContext())
            {
                foreach (DeliveryNote dn in ctx.DeliveryNotes.Include("Contract"))
                {
                    Console.WriteLine(string.Format("送货单号：{0}，送货日期：{1:yyyy-MM-dd}，到货金额：{2:#0,000.00}，合同编号：{3}，供应商：{4}，合同总金额：{5}，合同总金额(直接属性)：{6}",
                        dn.BillNo, dn.BillDate, dn.TotalPrice, dn.Contract.BillNo, dn.Contract.Supplier, dn.Contract.TotalPrice, dn.ContractTotalPrice));
                }
            }

            Console.WriteLine("\n\n按[回车]键退出...");
            Console.ReadLine();
        }