R2使用EF和MVC

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如何连接到SQL Server 2008 R2使用EF和MVC 3

本文介绍了如何连接到SQL Server 2008 R2使用EF和MVC 3的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我只是想了解MVC 3及继起的Wrox的一本书。事情是罚款，直到我试图执行一个小的锻炼。我得到一个错误，这是非常常见的。我曾尝试一切，但便无法发现问题是什么。有人可以帮我了。

I am simply trying to learn MVC 3 and following a book from Wrox. Things were fine until I tried to execute a small exercise. I am getting an error which is very common. I have tried everything but could't find what the problem is. Can somebody help me out.

我的配置。


  1. 安装VS201，然后用于WebPlatform中安装程序来安装SP1。这也安装了SP1和我的机器上安装MVC3模板和框架，以及。到目前为止好。

  1. installed VS201 and then used WebPlatForm Installer to install SP1. Which did installed SP1 and installed MVC3 templates and framework as well on my machine. So far so good.

这之后我安装的SQL Server 2008 R2开发版，再次到目前为止好。

After that I installed SQL Server 2008 R2 Developer Edition, again so far so good.

我也跟着一步一步的锻炼，发现这是成为我的噩梦错误。提到下面的错误。

I followed step by step the exercise and found an error which is becoming a nightmare for me. the error is mentioned below.

System.Data.ProviderIncompatibleException was unhandled by user code
  Message=The provider did not return a ProviderManifestToken string.
  Source=System.Data.Entity
  StackTrace:
       at System.Data.Common.DbProviderServices.GetProviderManifestToken(DbConnection connection)
       at System.Data.Entity.ModelConfiguration.Utilities.DbConnectionExtensions.GetProviderInfo(DbConnection connection, DbProviderManifest& providerManifest)
       at System.Data.Entity.DbModelBuilder.Build(DbConnection providerConnection)
       at System.Data.Entity.Internal.LazyInternalContext.CreateModel(LazyInternalContext internalContext)
       at System.Data.Entity.Internal.RetryLazy`2.GetValue(TInput input)
       at System.Data.Entity.Internal.LazyInternalContext.InitializeContext()
       at System.Data.Entity.Internal.InternalContext.Initialize()
       at System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType)
       at System.Data.Entity.Internal.Linq.InternalSet`1.Initialize()
       at System.Data.Entity.Internal.Linq.InternalSet`1.Include(String path)
       at System.Data.Entity.Infrastructure.DbQuery`1.Include(String path)
       at System.Data.Entity.DbExtensions.Include[T](IQueryable`1 source, String path)
       at System.Data.Entity.DbExtensions.Include[T,TProperty](IQueryable`1 source, Expression`1 path)
       at MvcMusicStore.Controllers.StoreManagerController.Index() in c:\users\uk\documents\visual studio 2010\Projects\MvcMusicStore\MvcMusicStore\Controllers\StoreManagerController.cs:line 21
       at lambda_method(Closure , ControllerBase , Object[] )
       at System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters)
       at System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters)
       at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters)
       at System.Web.Mvc.ControllerActionInvoker.<>c__DisplayClass15.<InvokeActionMethodWithFilters>b__12()
       at System.Web.Mvc.ControllerActionInvoker.InvokeActionMethodFilter(IActionFilter filter, ActionExecutingContext preContext, Func`1 continuation)
  InnerException: System.Data.SqlClient.SqlException
       Message=A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SQL Network Interfaces, error: 26 - Error Locating Server/Instance Specified)
       Source=.Net SqlClient Data Provider
       ErrorCode=-2146232060
       Class=20
       LineNumber=0
       Number=-1
       Server=""
       State=0
       StackTrace:
            at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection)
            at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning()
            at System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity)
            at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, SqlConnection owningObject)
            at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, TimeoutTimer timeout)
            at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, TimeoutTimer timeout, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance)
            at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance)
            at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection)
            at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options)
            at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject)
            at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject)
            at System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject)
            at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection)
            at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory)
            at System.Data.SqlClient.SqlConnection.Open()
            at System.Data.SqlClient.SqlProviderServices.UsingConnection(SqlConnection sqlConnection, Action`1 act)
            at System.Data.SqlClient.SqlProviderServices.UsingMasterConnection(SqlConnection sqlConnection, Action`1 act)
            at System.Data.SqlClient.SqlProviderServices.GetDbProviderManifestToken(DbConnection connection)
            at System.Data.Common.DbProviderServices.GetProviderManifestToken(DbConnection connection)
       InnerException:

作为一种解决方案。我已经检查了SQL Server Browser服务已启用。此外，我执行微软的PortyQry.exe找出如果SQL Server响应。并得到了以下回应。

As a solution. I have checked the SQL Server Browser Service is enabled. Also I executed the PortyQry.exe from Microsoft to find out if SQL Server is responding. and received the below response. 

Attempting to resolve name to IP address...


Name resolved to x.x.x.x

querying...

UDP port 1434 (ms-sql-m service): LISTENING or

Sending SQL Server query to UDP port 1434...

Server's response:

ServerName MVC3Machine
InstanceName MSSQLSERVER
IsClustered No
Version 10.50.1600.1
tcp 1433

 ♦  ♦

==== End of SQL Server query response ====

另外这里是连接字符串

Also here is the connection string 

<add name="MusicStoreDB" connectionString="Server=(local); Database=MusicStore; Trusted_Connection=true; Integrated Security=True" providerName="System.Data.SqlClient" />

EDIT1：
我没有使用任何数据库建立我的模型。我想使用EF的code第一种方法。

I am not using any database to build my Model. I am trying to use Code First approach of EF.

编辑2：

using System.Data.Entity;

namespace MvcMusicStore.Models
{
    public class MvcMusicStoreContext : DbContext
    {
        // You can add custom code to this file. Changes will not be overwritten.
        //
        // If you want Entity Framework to drop and regenerate your database
        // automatically whenever you change your model schema, add the following
        // code to the Application_Start method in your Global.asax file.
        // Note: this will destroy and re-create your database with every model change.
        //
        // System.Data.Entity.Database.SetInitializer(new System.Data.Entity.DropCreateDatabaseIfModelChanges<MvcMusicStore.Models.MvcMusicStoreContext>());

        public DbSet<Album> Albums { get; set; }

        public DbSet<Genre> Genres { get; set; }

        public DbSet<Artist> Artists { get; set; }
    }
}

任何人都可以建议我一些尝试...

Anybody can suggest me something to try...

感谢

推荐答案

在默认情况下，EFCF将尽力使从模型数据库在本地./SQLEX$p$pSS如果要指定一个不同的连接字符串你的web.config你必须告诉EF您的连接字符串的名称数据库中的背景像下面的构造函数：

By default, EFCF will try to make a database from your model on your local ./SQLEXPRESS If you want to specify a different connection string in your web.config you have to tell EF the name of your connection string in the constructor of your database context like below:

public class MvcMusicStoreContext: DbContext
{
    //Add the name of your database connection to the base DbContext calss
    public MvcMusicStoreContext() : base("MusicStoreDB")
    {}

    public DbSet<Album> Albums { get; set; }

    public DbSet<Genre> Genres { get; set; }

    public DbSet<Artist> Artists { get; set; }
}

您的连接字符串：

<add name="MusicStoreDB" connectionString="Data Source=localhost;Initial Catalog=MusicStoreDB;Integrated Security=True" providerName="System.Data.SqlClient"/>

这篇关于如何连接到SQL Server 2008 R2使用EF和MVC 3的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

08-29 03:39
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