在实体框架中创建包含现有数据源的表

Question

我是MVC的新手（使用MVC4和EF5），我一直在按照介绍性教程（http://www.asp.net/mvc/overview/gett...adding-a-model）来创建模型，控制器和视图。我想创建一个“订单”屏幕，其中显示所有订单等，这样我就可以理解使用EF的CRUD操作，但是当我发布到服务器时，我收到错误。

我做的第一件事是右键单击models文件夹并添加一个新类来创建模型：

Imports System.Data.Entity
Imports System.ComponentModel.DataAnnotations.Schema
Imports System.ComponentModel.DataAnnotations

<Table("Orders")> _
Public Class Orders
    <Key()> _
  <DatabaseGeneratedAttribute(DatabaseGeneratedOption.Identity)> _
    Public Property OrderID As Integer
    Public Property UserID As Integer
    Public Property OrderDate As DateTime
    Public Property OrderAmount As Decimal
End Class

Public Class OrdersDBContext
    Inherits DbContext

    Public Sub New()
        MyBase.New("OrdersDBContext")
    End Sub

    Public OrderList As DbSet(Of Orders)
    Public Property Orders As DbSet(Of Orders)
End Class

我接下来要做的是在Web.Config文件中添加一个订单项：

<add name="OrdersDBContext" connectionString="Data Source=dbnumber.db.1and1.com,1433;Initial Catalog=db620663152;User Id=dbo620663152;Password=xxxxx;" providerName="System.Data.SqlClient" />

我构建了项目，最终能够通过右键单击控制器文件夹并选择“添加控制器”来创建“OrdersController”，在向导中进行相应的选择。控制器现已添加。当我实际导航到新添加的订单区域时，我收到以下错误：

Server Error in '/' Application.

CREATE DATABASE permission denied in database 'master'.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: System.Data.SqlClient.SqlException: CREATE DATABASE permission denied in database 'master'.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace: 


[SqlException (0x80131904): CREATE DATABASE permission denied in database 'master'.]
System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +1787814
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +5341674
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +546
System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) +1693
System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async, Int32 timeout, Boolean asyncWrite) +869
System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean asyncWrite) +413
System.Data.SqlClient.SqlCommand.ExecuteNonQuery() +163
System.Data.SqlClient.<>c__DisplayClassa.<DbCreateDatabase>b__7(SqlConnection conn) +33
System.Data.SqlClient.SqlProviderServices.UsingConnection(SqlConnection sqlConnection, Action`1 act) +92
System.Data.SqlClient.SqlProviderServices.UsingMasterConnection(SqlConnection sqlConnection, Action`1 act) +379
System.Data.SqlClient.SqlProviderServices.DbCreateDatabase(DbConnection connection, Nullable`1 commandTimeout, StoreItemCollection storeItemCollection) +276
System.Data.Objects.ObjectContext.CreateDatabase() +84
System.Data.Entity.Migrations.Utilities.DatabaseCreator.Create(DbConnection connection) +84
System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists() +70
System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration) +44
System.Data.Entity.Internal.DatabaseCreator.CreateDatabase(InternalContext internalContext, Func`3 createMigrator, ObjectContext objectContext) +253
System.Data.Entity.Internal.InternalContext.CreateDatabase(ObjectContext objectContext) +125
System.Data.Entity.Database.Create(Boolean skipExistsCheck) +115
System.Data.Entity.CreateDatabaseIfNotExists`1.InitializeDatabase(TContext context) +307
System.Data.Entity.Internal.<>c__DisplayClass8.<PerformDatabaseInitialization>b__6() +19
System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) +60
System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() +181
System.Data.Entity.Internal.LazyInternalContext.<InitializeDatabase>b__4(InternalContext c) +7
System.Data.Entity.Internal.RetryAction`1.PerformAction(TInput input) +110
System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action`1 action) +185
System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase() +73
System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +28
System.Data.Entity.Internal.Linq.InternalSet`1.Initialize() +52
System.Data.Entity.Internal.Linq.InternalSet`1.GetEnumerator() +15
System.Data.Entity.Infrastructure.DbQuery`1.System.Collections.Generic.IEnumerable<TResult>.GetEnume rator() +40
System.Collections.Generic.List`1..ctor(IEnumerable`1 collection) +369
System.Linq.Enumerable.ToList(IEnumerable`1 source) +58
TampaBayDeliveryV4.OrdersController.Index() +21
lambda_method(Closure , ControllerBase , Object[] ) +62
System.Web.Mvc.ActionMethodDispatcher.Execute(ControllerBase controller, Object[] parameters) +14
System.Web.Mvc.ReflectedActionDescriptor.Execute(ControllerContext controllerContext, IDictionary`2 parameters) +181
System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
System.Web.Mvc.Async.<>c__DisplayClass42.<BeginInvokeSynchronousActionMethod>b__41() +28
System.Web.Mvc.Async.<>c__DisplayClass8`1.<BeginSynchronous>b__7(IAsyncResult _) +10
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32
System.Web.Mvc.Async.<>c__DisplayClass39.<BeginInvokeActionMethodWithFilters>b__33() +58
System.Web.Mvc.Async.<>c__DisplayClass4f.<InvokeActionMethodFilterAsynchronously>b__49() +225
System.Web.Mvc.Async.<>c__DisplayClass37.<BeginInvokeActionMethodWithFilters>b__36(IAsyncResult asyncResult) +10
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
System.Web.Mvc.Async.<>c__DisplayClass2a.<BeginInvokeAction>b__20() +24
System.Web.Mvc.Async.<>c__DisplayClass25.<BeginInvokeAction>b__22(IAsyncResult asyncResult) +99
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +50
System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
System.Web.Mvc.<>c__DisplayClass1d.<BeginExecuteCore>b__18(IAsyncResult asyncResult) +14
System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +55
System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +39
System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +55
System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +29
System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
System.Web.Mvc.<>c__DisplayClass8.<BeginProcessRequest>b__3(IAsyncResult asyncResult) +25
System.Web.Mvc.Async.<>c__DisplayClass4.<MakeVoidDelegate>b__3(IAsyncResult ar) +23
System.Web.Mvc.Async.WrappedAsyncResult`1.End() +55
System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +31
System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9651516
System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.34280

所以，我不确定这里发生了什么。我正在使用共享主机，无法远程访问数据库;我也不能让代码创建一个新的数据库，代码需要使用现有的数据库并添加表。这对于帐户模型来说很好（它为身份验证/帐户创建了必要的基础表）。我认为这里的问题是代码期望创建一个新数据库（因为订单表还不存在？）。

如果我的假设并非偏离基础，我该怎么做才能告诉我的MVC应用程序使用连接字符串中的现有数据源而不是尝试创建一个全新的数据库？我基本上希望我的应用程序使用web.config文件中的给定连接字符串创建表。

感谢您的任何建议。