EntityFramework 多数据库链接,MySql,SqlServer,Oracel等
- WBOYOriginal
- 2016-06-07 15:40:111537browse
环境：EntityFramework5.0，MySql5.6，MSSQL2012 EF是强大的ORM工具，真正意义上的多数据库链接指的是不同类型的数据库，以及同种类型的数据库多个库，EF很好的支持这一点，下面简单演示下： 创建一个MVC4.0，Framework4.5的基本项目，然后重点是WebConfig配
环境：EntityFramework5.0，MySql5.6，MSSQL2012
EF是强大的ORM工具，真正意义上的多数据库链接指的是不同类型的数据库，以及同种类型的数据库多个库，EF很好的支持这一点，下面简单演示下：
创建一个MVC4.0，Framework4.5的基本项目，然后重点是WebConfig配置：
<?xml version=<span>"<span>1.0</span><span>"</span> encoding=<span>"</span><span>utf-8</span><span>"</span>?>
<!--<span>
For more information on how to configure your ASP.NET application, please visit
http:</span><span>//</span><span>go.microsoft.com/fwlink/?LinkId=152368</span>
-->
<configuration>
<configdivs>
<!-- For more information on Entity Framework configuration, visit http:<span>//</span><span>go.microsoft.com/fwlink/?LinkID=237468 -->
<div name="<span">"<span>entityFramework</span><span>"</span> type=<span>"</span><span>System.Data.Entity.Internal.ConfigFile.EntityFrameworkdiv, EntityFramework, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</span><span>"</span> requirePermission=<span>"</span><span>false</span><span>"</span> />
<connectionstrings>
<span> //无论多少类型，多少个同类型数据库，尽管加吧</span><em><strong><span>
<add name="DefaultDB" connectionstring="Server=localhost;Uid=sa;Pwd=ovenjackchain;DataBase=CN9295;" providername="System.Data.SqlClient"></add>
<add name="DbConMySql" providername="MySql.Data.MySqlClient" connectionstring="Data Source=172.16.205.61;Port=3306;Initial Catalog=WMC;uid=assp;pwd=assp123;"></add></span></strong></em>
</connectionstrings>
<appsettings>
<add key="<span">"<span>webpages:Version</span><span>"</span> value=<span>"</span><span>2.0.0.0</span><span>"</span> />
<add key="<span">"<span>webpages:Enabled</span><span>"</span> value=<span>"</span><span>false</span><span>"</span> />
<add key="<span">"<span>PreserveLoginUrl</span><span>"</span> value=<span>"</span><span>true</span><span>"</span> />
<add key="<span">"<span>ClientValidationEnabled</span><span>"</span> value=<span>"</span><span>true</span><span>"</span> />
<add key="<span">"<span>UnobtrusiveJavaScriptEnabled</span><span>"</span> value=<span>"</span><span>true</span><span>"</span> />
</add></add></add></add></add></appsettings>
<system.web>
<httpruntime targetframework="<span">"<span>4.5</span><span>"</span> />
<compilation debug="<span">"<span>true</span><span>"</span> targetFramework=<span>"</span><span>4.5</span><span>"</span> />
<authentication mode="<span">"<span>Forms</span><span>"</span>>
<forms loginurl="<span">"<span>~/Account/Login</span><span>"</span> timeout=<span>"</span><span>2880</span><span>"</span> />
</forms></authentication>
<pages>
<namespaces>
<add>namespace=<span>"</span><span>System.Web.Helpers</span><span>"</span> />
<add>namespace=<span>"</span><span>System.Web.Mvc</span><span>"</span> />
<add>namespace=<span>"</span><span>System.Web.Mvc.Ajax</span><span>"</span> />
<add>namespace=<span>"</span><span>System.Web.Mvc.Html</span><span>"</span> />
<add>namespace=<span>"</span><span>System.Web.Optimization</span><span>"</span> />
<add>namespace=<span>"</span><span>System.Web.Routing</span><span>"</span> />
<add>namespace=<span>"</span><span>System.Web.WebPages</span><span>"</span> />
</add></add></add></add></add></add></add></namespaces>
</pages>
<profile defaultprovider="<span">"<span>DefaultProfileProvider</span><span>"</span>>
<providers>
<add name="<span">"<span>DefaultProfileProvider</span><span>"</span> type=<span>"</span><span>System.Web.Providers.DefaultProfileProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35</span><span>"</span> connectionStringName=<span>"</span><span>DefaultConnection</span><span>"</span> applicationName=<span>"</span><span>/</span><span>"</span> />
</add></providers>
</profile>
<membership defaultprovider="<span">"<span>DefaultMembershipProvider</span><span>"</span>>
<providers>
<add name="<span">"<span>DefaultMembershipProvider</span><span>"</span> type=<span>"</span><span>System.Web.Providers.DefaultMembershipProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35</span><span>"</span> connectionStringName=<span>"</span><span>DefaultConnection</span><span>"</span> enablePasswordRetrieval=<span>"</span><span>false</span><span>"</span> enablePasswordReset=<span>"</span><span>true</span><span>"</span> requiresQuestionAndAnswer=<span>"</span><span>false</span><span>"</span> requiresUniqueEmail=<span>"</span><span>false</span><span>"</span> maxInvalidPasswordAttempts=<span>"</span><span>5</span><span>"</span> minRequiredPasswordLength=<span>"</span><span>6</span><span>"</span> minRequiredNonalphanumericCharacters=<span>"</span><span>0</span><span>"</span> passwordAttemptWindow=<span>"</span><span>10</span><span>"</span> applicationName=<span>"</span><span>/</span><span>"</span> />
</add></providers>
</membership>
<rolemanager defaultprovider="<span">"<span>DefaultRoleProvider</span><span>"</span>>
<providers>
<add name="<span">"<span>DefaultRoleProvider</span><span>"</span> type=<span>"</span><span>System.Web.Providers.DefaultRoleProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35</span><span>"</span> connectionStringName=<span>"</span><span>DefaultConnection</span><span>"</span> applicationName=<span>"</span><span>/</span><span>"</span> />
</add></providers>
</rolemanager>
<sessionstate mode="<span">"<span>InProc</span><span>"</span> customProvider=<span>"</span><span>DefaultSessionProvider</span><span>"</span>>
<providers>
<add name="<span">"<span>DefaultSessionProvider</span><span>"</span> type=<span>"</span><span>System.Web.Providers.DefaultSessionStateProvider, System.Web.Providers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35</span><span>"</span> connectionStringName=<span>"</span><span>DefaultConnection</span><span>"</span> />
</add></providers>
</sessionstate>
</compilation></httpruntime></system.web>
<system.webserver>
<validation validateintegratedmodeconfiguration="<span">"<span>false</span><span>"</span> />
<handlers>
<remove name="<span">"<span>ExtensionlessUrlHandler-ISAPI-4.0_32bit</span><span>"</span> />
<remove name="<span">"<span>ExtensionlessUrlHandler-ISAPI-4.0_64bit</span><span>"</span> />
<remove name="<span">"<span>ExtensionlessUrlHandler-Integrated-4.0</span><span>"</span> />
<add name="<span">"<span>ExtensionlessUrlHandler-ISAPI-4.0_32bit</span><span>"</span> path=<span>"</span><span>*.</span><span>"</span> verb=<span>"</span><span>GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS</span><span>"</span> modules=<span>"</span><span>IsapiModule</span><span>"</span> scriptProcessor=<span>"</span><span>%windir%\Microsoft.NET\Framework\v4.0.30319\aspnet_isapi.dll</span><span>"</span> preCondition=<span>"</span><span>classicMode,runtimeVersionv4.0,bitness32</span><span>"</span> responseBufferLimit=<span>"</span><span>0</span><span>"</span> />
<add name="<span">"<span>ExtensionlessUrlHandler-ISAPI-4.0_64bit</span><span>"</span> path=<span>"</span><span>*.</span><span>"</span> verb=<span>"</span><span>GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS</span><span>"</span> modules=<span>"</span><span>IsapiModule</span><span>"</span> scriptProcessor=<span>"</span><span>%windir%\Microsoft.NET\Framework64\v4.0.30319\aspnet_isapi.dll</span><span>"</span> preCondition=<span>"</span><span>classicMode,runtimeVersionv4.0,bitness64</span><span>"</span> responseBufferLimit=<span>"</span><span>0</span><span>"</span> />
<add name="<span">"<span>ExtensionlessUrlHandler-Integrated-4.0</span><span>"</span> path=<span>"</span><span>*.</span><span>"</span> verb=<span>"</span><span>GET,HEAD,POST,DEBUG,PUT,DELETE,PATCH,OPTIONS</span><span>"</span> type=<span>"</span><span>System.Web.Handlers.TransferRequestHandler</span><span>"</span> preCondition=<span>"</span><span>integratedMode,runtimeVersionv4.0</span><span>"</span> />
</add></add></add></remove></remove></remove></handlers>
</validation></system.webserver>
<runtime>
<assemblybinding xmlns="<span">"<span>urn:schemas-microsoft-com:asm.v1</span><span>"</span>>
<dependentassembly>
<assemblyidentity name="<span">"<span>System.Web.Helpers</span><span>"</span> publicKeyToken=<span>"</span><span>31bf3856ad364e35</span><span>"</span> />
<bindingredirect oldversion="<span">"<span>1.0.0.0-2.0.0.0</span><span>"</span> newVersion=<span>"</span><span>2.0.0.0</span><span>"</span> />
</bindingredirect></assemblyidentity></dependentassembly>
<dependentassembly>
<assemblyidentity name="<span">"<span>System.Web.Mvc</span><span>"</span> publicKeyToken=<span>"</span><span>31bf3856ad364e35</span><span>"</span> />
<bindingredirect oldversion="<span">"<span>1.0.0.0-4.0.0.0</span><span>"</span> newVersion=<span>"</span><span>4.0.0.0</span><span>"</span> />
</bindingredirect></assemblyidentity></dependentassembly>
<dependentassembly>
<assemblyidentity name="<span">"<span>System.Web.WebPages</span><span>"</span> publicKeyToken=<span>"</span><span>31bf3856ad364e35</span><span>"</span> />
<bindingredirect oldversion="<span">"<span>1.0.0.0-2.0.0.0</span><span>"</span> newVersion=<span>"</span><span>2.0.0.0</span><span>"</span> />
</bindingredirect></assemblyidentity></dependentassembly>
</assemblybinding>
</runtime><br><span>下面这里注释掉，否则会默认根据默认工厂来找</span>
<span> <em><strong><span><!--<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="v11.0" />
</parameters>
</defaultConnectionFactory>
--><!--<defaultConnectionFactory type="MySql.Data.Entity.MySqlConnectionFactory, MySql.Data.Entity.EF5">
</defaultConnectionFactory>--><!--
</entityFramework>--></span></strong></em></span>
<system.data><br><span>如果你还有其他的数据库类型，那么只需要在这里加配置即可</span>
<span><em><span><strong><dbproviderfactories>
<remove invariant="MySql.Data.MySqlClient"></remove>
<add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.7.5.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d"></add>
</dbproviderfactories></strong></span></em></span>
</system.data>
<p>以上配置部分，斜体和红字的是我修改过的，其他都是项目自动产生的。</p>
<p> </p>
<p>测试：</p>
<p>
</p>
<pre class="brush:php;toolbar:false"><span>using</span><span> System;
</span><span>using</span><span> System.Collections.Generic;
</span><span>using</span><span> System.Configuration;
</span><span>using</span><span> System.Data.Entity;
</span><span>using</span><span> System.Linq;
</span><span>using</span><span> System.Web;
</span><span>using</span><span> System.Web.Mvc;
</span><span>using</span><span> MySql.Data.Entity;
</span><span>using</span><span> System.Data.Entity.ModelConfiguration.Conventions;
</span><span>using</span><span> System.ComponentModel.DataAnnotations;
</span><span>namespace</span><span> MvcEFMySql.Controllers
{
</span><span>//</span><span>这里是mysql的</span>
<span>public</span> <span>class</span><span> MyContext : DbContext
{
</span><span>public</span> MyContext(<span>string</span><span> DefaultDb)
: </span><span>base</span><span>(DefaultDb)
{
</span><span>//</span><span>Database.DefaultConnectionFactory = MySql.Data.MySqlClient.MySqlClientFactory;
</span><span>//</span><span>Database.Connection.ConnectionString = ;</span>
Database.SetInitializer<mycontext>(<span>null</span><span>);
}
</span><span>protected</span> <span>override</span> <span>void</span><span> OnModelCreating(DbModelBuilder modelBuilder)
{
</span><span>//</span><span>已经存在的数据库，不然会出现负数</span>
modelBuilder.Conventions.Remove<pluralizingtablenameconvention><span>();
</span><span>base</span><span>.OnModelCreating(modelBuilder);
}
</span><span>public</span> DbSet<user> user { <span>get</span>; <span>set</span><span>; }
}
</span><span>//</span><span>这里是sqlserver的</span>
<span>public</span> <span>class</span><span> SQLContext : DbContext
{
</span><span>public</span> SQLContext(<span>string</span><span> DefaultDb)
: </span><span>base</span><span>(DefaultDb)
{
</span><span>//</span><span>Database.DefaultConnectionFactory = MySql.Data.MySqlClient.MySqlClientFactory;
</span><span>//</span><span>Database.Connection.ConnectionString = ;</span>
Database.SetInitializer<mycontext>(<span>null</span><span>);
}
</span><span>protected</span> <span>override</span> <span>void</span><span> OnModelCreating(DbModelBuilder modelBuilder)
{
</span><span>//</span><span>已经存在的数据库，不然会出现负数</span>
modelBuilder.Conventions.Remove<pluralizingtablenameconvention><span>();
</span><span>base</span><span>.OnModelCreating(modelBuilder);
}
</span><span>public</span> DbSet<do_category> category { <span>get</span>; <span>set</span><span>; }
}
</span><span>public</span> <span>class</span><span> DO_Category
{
</span><span>public</span><span> DO_Category() { }
[Key]
</span><span>public</span> Guid Id { <span>get</span>; <span>set</span><span>; }
</span><span>///</span> <span><summary></summary></span>
<span>///</span><span> 类目
</span><span>///</span> <span></span>
<span>public</span> <span>string</span> Category { <span>get</span>; <span>set</span><span>; }
</span><span>///</span> <span><summary></summary></span>
<span>///</span><span> 图标
</span><span>///</span> <span></span>
<span>public</span> <span>string</span> IconName { <span>get</span>; <span>set</span><span>; }
</span><span>///</span> <span><summary></summary></span>
<span>///</span><span> 排序
</span><span>///</span> <span></span>
<span>public</span> <span>int</span> OrderIndex { <span>get</span>; <span>set</span><span>; }
</span><span>///</span> <span><summary></summary></span>
<span>///</span><span> 父节点
</span><span>///</span> <span></span>
<span>public</span> Guid FatherId { <span>get</span>; <span>set</span><span>; }
</span><span>public</span> <span>string</span> CreateUser { <span>get</span>; <span>set</span><span>; }
</span><span>public</span> DateTime CreateTime { <span>get</span>; <span>set</span><span>; }
</span><span>public</span> <span>string</span> ModifyUser { <span>get</span>; <span>set</span><span>; }
</span><span>public</span> DateTime? ModifyTime { <span>get</span>; <span>set</span><span>; }
1438906181
</span><span>public</span> Byte[] RowVersion { <span>get</span>; <span>set</span><span>; }
}
</span><span>public</span> <span>class</span><span> User
{
</span><span>public</span> Guid Id { <span>get</span>; <span>set</span><span>; }
</span><span>public</span> <span>string</span> UserName { <span>get</span>; <span>set</span><span>; }
}
</span><span>public</span> <span>class</span><span> HomeController : Controller
{
</span><span>//</span>
<span>//</span><span> GET: /Home/</span>
<span>public</span><span> ActionResult Index()
{
</span><span>//</span><span>Database.SetInitializer(new DropCreateDatabaseAlways<mycontext>());
</mycontext></span><span>//</span><span>操作MySql数据库</span>
<span>var</span> context = <span>new</span> MyContext(<span>"</span><span>DbConMySql</span><span>"</span><span>);
context.user.Add(</span><span>new</span> User { Id = Guid.NewGuid(), UserName = <span>"</span><span>jackchain</span><span>"</span><span> });
context.SaveChanges();
</span><span>var</span> userlist=<span> context.user.ToList();
</span><span>//</span><span>获取SQLServer数据库内容</span>
<span>var</span> sqlc = <span>new</span> SQLContext(<span>"</span><span>DefaultDB</span><span>"</span><span>);
ViewBag.clist </span>=<span> sqlc.category.ToList();
</span><span>return</span><span> View(userlist);
}
}
}</span></do_category></pluralizingtablenameconvention></mycontext></user></pluralizingtablenameconvention></mycontext>
ok尽情品味吧。EF6的webconfig稍加不同。重点还是webconfig配置
mysql中文乱码问题，请在连接串最后加：Character Set=utf8;
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