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MVC4,MVC3,VS2012+ entity framework Migration from Sqlserver

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在开发的初期个人认为因VS与Sqlserver的配合很默契,即可以方便的实现Code First,又可以使用SqlServer Manager很漂亮的进行建模与变更,也许是个人的使用习惯MS的界面做的很好,乎开源的产品美感上都追不上商用版。 所以个人比较喜欢的开发流程是初次开发以

在开发的初期个人认为因VS与Sqlserver的配合很默契,即可以方便的实现Code First,又可以使用SqlServer Manager很漂亮的进行建模与变更,也许是个人的使用习惯MS的界面做的很好,似乎开源的产品美感上都追不上商用版。

所以个人比较喜欢的开发流程是初次开发以SqlServer Manager进行数据库建模,初步建构业务逻辑;

其次使用Vs的Entity FrameWork 快速的建立起ROM;

最后当开发进行到一定程度时再进行数据库迁移,把SqlServer 转换为MySql。

一、环境:Win 8.1 + Vs2012 + MysqlServer 5.7 + WorkBench 6.0 CE 

注意事项:

1. 在某种怪异的情况下Win 8.1 + vs2012 +mysql 5.7 此种搭配是无法使用的,在StackOverFlow中也有很多码友们,包括身边的同事也都有遇到过类似问题,

现象是在Win8.1下安装mysql5.7 时,mysql for vs2012 与 mysql connection net 5.7无法正常安装,即使卸载Mysql也无用,自然在Vs2012中添加Ado.net entity model时未有Mysql conncetion集成到Vs中,但往往在Vs的SqlServer Explore中你可以添加Mysql,但不要试图填写conncetion string,因为那样会让您老人家Vs崩溃。

原因可能是Mysql 在配合MS的新家伙Win 8.1 系统时有Bug存在。

解决办法:此种情况并非每次都会出现,但出现以后很难解决,如果哪位码友知道请赐教;重装系统或者自己运气好,软件自动修复了。

2.使用WorkBench可以很方便的进行数据库迁移,很人性化,自动把SqlServer转为MySql,但某些字段的转换会失败,需要手动修复了。

3.在Vs连接Mysql时不要使用Root,尽量配置以项目为区分的私有帐户,这样可以最大化的实现自定义,配置为允许远程连接的即可。

4.在VS2012创建MySql的Ado.net entity framework时生成的实体全是小写,会使原有建立在SqlServer实体化基础上的代码出现问题,木有关系,把原来的Copy过来即可,Simple.

 不过还有一个办法就是使用DbLinq(https://code.google.com/p/dblinq2007/)来替代EF,但不建议使用在正规场合,学习可以,因为其最终版本是2007年,此后再无更新。

二、流程:

  数据库迁移:直接使用WorkBench进行数据库从SqlServer 迁移到MySql。

  代码迁移:  

  1.  确保成功安装Connector NET 6.7.4 与 MySQL for Visual Studio 1.0.2

  2.  创建MVC3 Web Application,添加引用从NuGet或者MySQL for Visual Studio 1.0.2中获取最新版本的三个DLL:MySql.Data,MySql.Data.Entity,MySql.Web。

  3.  如果以上步骤OK的话,当向项目中添加Ado.net entity framework时,New Connection 就可以看到Mysql database选项,否则你就倒霉了,可以参考环境->注意事项;

  4.  修改Web.Config,需要增加及修改的示例代码如下:

<span><span>connectionStrings</span><span>></span>
    <span><span>add </span><span>name</span><span>="MySQLConnString"</span><span>
         connectionString</span><span>="Server=192.168.29.157;Port=3306;Database=**;Uid=**;Pwd=**;"</span><span>
         providerName</span><span>="MySql.Data.MySqlClient"</span> <span>/></span>
    <span><span>add </span><span>name</span><span>="newsoftgatewayEntities"</span><span>
         connectionString</span><span>="metadata=res://*/NewsoftGateWay.csdl|res://*/NewsoftGateWay.ssdl|res://*/NewsoftGateWay.msl;provider=MySql.Data.MySqlClient;provider connection string="server=192.168.29.157;user id=**;password=**;database=newsoftgateway""</span><span>
         providerName</span><span>="System.Data.EntityClient"</span> <span>/></span>
  <span></span><span>connectionStrings</span><span>></span></span></span></span>
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  <span><span>system.web</span><span>></span>
<span><span>membership </span><span>defaultProvider</span><span>="MySqlMembershipProvider"</span><span>></span>
      <span><span>providers</span><span>></span>
        <span><span>clear </span><span>/></span>
        <span><span>add </span><span>name</span><span>="MySqlMembershipProvider"</span><span>
             type</span><span>="MySql.Web.Security.MySQLMembershipProvider,MySql.Web,Version=6.7.4,Culture=neutral,PublicKeyToken=c5687fc88969c44d"</span><span>
             connectionStringName</span><span>="MySQLConnString"</span><span> enablePasswordRetrieval</span><span>="false"</span><span> enablePasswordReset</span><span>="true"</span><span>
             requiresQuestionAndAnswer</span><span>="false"</span><span> requiresUniqueEmail</span><span>="true"</span><span> passwordFormat</span><span>="Hashed"</span><span>
             maxInvalidPasswordAttempts</span><span>="5"</span><span> minRequiredPasswordLength</span><span>="6"</span><span> minRequiredNonalphanumericCharacters</span><span>="0"</span><span>
             passwordAttemptWindow</span><span>="10"</span><span> applicationName</span><span>="/"</span><span> autogenerateschema</span><span>="true"</span> <span>/></span>
      <span></span><span>providers</span><span>></span>
    <span></span><span>membership</span><span>></span>
    <span><span>profile</span><span>></span>
      <span><span>providers</span><span>></span>
        <span><span>clear </span><span>/></span>
        <span><span>add </span><span>name</span><span>="MySQLProfileProvider"</span><span>
             type</span><span>="MySql.Web.Profile.MySQLProfileProvider, MySql.Web, Version=6.7.4.0,Culture=neutral,PublicKeyToken=c5687fc88969c44d"</span><span>
             connectionStringName</span><span>="MySQLConnString"</span><span> applicationName</span><span>="/"</span> <span>/></span>
      <span></span><span>providers</span><span>></span>
    <span></span><span>profile</span><span>></span>
    <span><span>roleManager </span><span>enabled</span><span>="true"</span><span> defaultProvider</span><span>="MySQLRoleProvider"</span><span>></span>
      <span><span>providers</span><span>></span>
        <span><span>clear </span><span>/></span>
        <span><span>add </span><span>name</span><span>="MySQLRoleProvider"</span><span>
             type</span><span>="MySql.Web.Security.MySQLRoleProvider, MySql.Web,Version=6.7.4.0,Culture=neutral,PublicKeyToken=c5687fc88969c44d"</span><span>
             connectionStringName</span><span>="MySQLConnString"</span><span> applicationName</span><span>="/"</span> <span>/></span>
      <span></span><span>providers</span><span>></span>
    <span></span><span>roleManager</span><span>></span>
    <span><span>sessionState </span><span>mode</span><span>="InProc"</span><span> customProvider</span><span>="MysqlSessionProvider"</span><span>></span>
      <span><span>providers</span><span>></span>
        <span><span>add </span><span>name</span><span>="MysqlSessionProvider"</span><span>
             type</span><span>="MySql.Web.SessionState.MySqlSessionStateStore, MySql.Web, Version=6.7.4.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"</span><span>
             connectionStringName</span><span>="MySQLConnString"</span> <span>/></span>
      <span></span><span>providers</span><span>></span>
    <span></span><span>sessionState</span><span>></span>
  <span></span><span>system.web</span><span>></span>
<span><span>system.data</span><span>></span>
    <span><span>DbProviderFactories</span><span>></span>
      <span><span>remove </span><span>invariant</span><span>="MySql.Data.MySqlClient"</span> <span>/></span>
      <span><span>add </span><span>name</span><span>="MySQL Data Provider"</span><span> invariant</span><span>="MySql.Data.MySqlClient"</span><span>
           description</span><span>=".Net Framework Data Provider for MySQL"</span><span>
           type</span><span>="MySql.Data.MySqlClient.MySqlClientFactory,MySql.Data"</span> <span>/></span>
    <span></span><span>DbProviderFactories</span><span>></span>
  <span></span><span>system.data</span><span>></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>
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  5.  到目前为止,正常情况下或者使用CodeFirst或者使用Migration,应该都可以实现MVC3 在MySql下登录和注册模块的功能。:)恭喜已经接近成功了。

  6.  之所以不直接使用MVC4是因为MySql 对MVC4的支持并不是太好,时不时会出现很多问题;所以建议使用MVC3按以上步骤调试OK后再往MVC4上转换;所谓转换只是用MVC3的相关权限功能模块来替换掉MVC4的,主要包括AccountController,AccountModels,相关View,Global.asax。

<span> 1</span>  <span>protected</span> <span>void</span><span> Application_Start()
</span><span> 2</span> <span>        {
</span><span> 3</span> <span>            AreaRegistration.RegisterAllAreas();
</span><span> 4</span> 
<span> 5</span> <span>            WebApiConfig.Register(GlobalConfiguration.Configuration);
</span><span> 6</span> <span>            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
</span><span> 7</span> <span>            RouteConfig.RegisterRoutes(RouteTable.Routes);
</span><span> 8</span>             BundleTable.EnableOptimizations = <span>true</span><span>;
</span><span> 9</span> <span>            BundleConfig.RegisterBundles(BundleTable.Bundles);
</span><span>10</span> <span>            AuthConfig.RegisterAuth();
</span><span>11</span>             BCRMonitor.RegisterGlobalMonitor(Server.MapPath(<span>string</span>.Format(<span>"</span><span>~/photos/</span><span>"</span><span>)));
</span><span>12</span> 
<span>13</span>             <span>//</span><span>AreaRegistration.RegisterAllAreas();
</span><span>14</span> 
<span>15</span>             <span>//</span><span> Use LocalDB for Entity Framework by default
</span><span>16</span>            <span>//</span><span> Database.DefaultConnectionFactory = new SqlConnectionFactory(@"Data Source=(localdb)\v11.0; Integrated Security=True; MultipleActiveResultSets=True");
</span><span>17</span> 
<span>18</span>            <span>//</span><span> RegisterGlobalFilters(GlobalFilters.Filters);
</span><span>19</span>             <span>//</span><span>RegisterRoutes(RouteTable.Routes);</span>
<span>20</span>         }
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  7. 可能在上一步骤进行过程中会出现一些问题,耐心调试就OK了。

  注意事项:

    a.  mysql出现异常“ Every derived table must have its own alias” 此种问题在linq to mysql 的过程中也可能会遇到,只是linq to sql本身就是MS为Sqlserver开发的,当涉及到多表综合查询时,对mysql的支持就不太好了,如语句 return GetAll("").Where(x => x.Id == id).Take(1).SingleOrDefault(); 就会引起此类问题,可以换种linq写法规避。

     b.  在使用NuGet引用MySql.Data.Entity时注意其版本需要和packages.config,web.config,MySQL for Visual Studio 1.0.2 等中一致,否则也会提示错误:

System.IO.FileNotFoundException: 未能加载文件或程序集"MySql.Data, Version=6.1.3.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"或它的某一个依赖项。系统找不到指定的文件。
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    c.  System.ArgumentException: 不支持关键字: “metadata”。 错误原因可能是connection string provider 未修改成 providerName="MySql.Data.MySqlClient"  

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