EntityFramework数据库配置（code frist）

什么也不说先贴代码

<?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=4.4.0.0, Culture=neutral, 

PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="v11.0" />
      </parameters>
    </defaultConnectionFactory>
  </entityFramework>
</configuration>

<?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=4.4.0.0, Culture=neutral, 

PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <connectionStrings>
    <add name="EntityContextEntities" connectionString="metadata=res://*/Model1.csdl|res://*/Model1.ssdl|res://*/Model1.msl;provider=System.Data.SqlClient;provider 

connection string="data source=.;initial catalog=EntityContext;integrated security=True;MultipleActiveResultSets=True;App=EntityFramework"" 

providerName="System.Data.EntityClient" />
  </connectionStrings>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="v11.0" />
        <!--<parameter value="Data Source=.;Integrated Security=True" />-->
      </parameters>
    </defaultConnectionFactory>
  </entityFramework>
</configuration>

以上是我在配置是出的问题，我当时采用的是默认数据库连接测试

在EF中我大致看到了三种数据库连接的Factory，我用到了LocalDbConnectionFactory和SqlConnectionFactory，这两个在配置上有一定的差异，而且默认配置不能指定数据库名

<?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=4.4.0.0, Culture=neutral, 

PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <entityFramework>
    <!--<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="v11.0"/>
        <parameter value="Data Source=.;Initial Catalog=EntityContext;User ID=sa; Password=123456;MultipleActiveResultSets=True" />
      </parameters>
    </defaultConnectionFactory>-->
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework">
      <parameters>
        <!--<parameter value="v11.0"/>-->
        <parameter value="Data Source=.;Initial Catalog=EntityContext;User ID=sa; Password=123456;MultipleActiveResultSets=True" />
      </parameters>
    </defaultConnectionFactory>
  </entityFramework>
  <connectionStrings>
    <add name="EntityContext" connectionString="Data Source=.; Database=EntityContext; User ID=sa; Password=123456;" providerName="System.Data.SqlClient"/>
  </connectionStrings>
</configuration>

经过反复测试，（Model frist和DB frist的数据库连接信息是放在connectionStrings标签内，code frist则放在entityFramework的parameter中，且连接字符串需要加上

MultipleActiveResultSets=True）
还有就是更换System.Data.Entity.Infrastructure.SqlConnectionFactory数据库工厂类，

如果使用MSSQL，要用SqlConnectionFactory这个链接库和自己命名的数据库名，并在<connectionStrings>标签下写链接配置，代码中确定连接的名字。

public EntityContext()
            : base("name=EntityContext")//此处不是数据库名，是链接字符串的名字
        {

        }