MVC： 找不到请求的 .Net Framework Data Provider。可能没有安装

遇到这个问题，我是下载SQL Server Compact 4.0 安装后就可以解决。下载地址是：

http://www.microsoft.com/downloads/zh-cn/details.aspx?familyid=033cfb76-5382-44fb-bc7e-b3c8174832e2&displaylang=zh-cn

在寻找解决办法的时候还找到一个学习MVC的例子，MVC music store http://mvcmusicstore.codeplex.com/ 我现在学习的例子是ContosoUniversity

在寻找解决方法时，找到几个解答，在这里收集起来。

在C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\CONFIG中machine.config(xml文件)中有一个字段是<DbProviderFactories>

添加注册，<name= "SqlClient Data Provider">或者<name="MySQL Data Provider"

<system.data>
<DbProviderFactories>
<add name="Odbc Data Provider" invariant="System.Data.Odbc" description=".Net Framework Data Provider for Odbc" type="System.Data.Odbc.OdbcFactory, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
<add name="OleDb Data Provider" invariant="System.Data.OleDb" description=".Net Framework Data Provider for OleDb" type="System.Data.OleDb.OleDbFactory, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
<add name="OracleClient Data Provider" invariant="System.Data.OracleClient" description=".Net Framework Data Provider for Oracle" type="System.Data.OracleClient.OracleClientFactory, System.Data.OracleClient, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089" />
<add name="SqlClient Data Provider" invariant="System.Data.SqlClient" description=".Net Framework Data Provider for SqlServer" type="System.Data.SqlClient.SqlClientFactory, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"
/>
<add name="SQL Server CE Data Provider" invariant="Microsoft.SqlServerCe.Client" description=".NET Framework Data Provider for Microsoft SQL Server 2005 Mobile Edition" type="Microsoft.SqlServerCe.Client.SqlCeClientFactory, Microsoft.SqlServerCe.Client,
Version=9.0.242.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91" />
<add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL"type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data,
Version=5.0.2.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
<add name="SqlClient Data Provider" invariant="System.Data.SqlClient" description=".Net Framework Data Provider for SqlServer" type="System.Data.SqlClient.SqlClientFactory, System.Data, Version=2.0.0.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089"/>

</DbProviderFactories>
</system.data>

在最后面我想添加一些MVC开发需要安装的软件，

Before you start, make sure you have the following software installed on your computer:


Visual Studio 2010 SP1 or Visual Web Developer Express 2010 SP1 (If you use one of these links, the following items will be installed automatically.)

 ASP.NET MVC 3 Tools Update

 Microsoft SQL Server Compact 4.0

 Microsoft Visual Studio 2010 SP1 Tools for SQL Server Compact 4.0