网站使用本地数据库很好，但尝试（并失败）在服务器上创建远程数据库

Question

我为博客创建了一个网站，但它已停止运作。当我访问网站（www.robanthony.co.uk）时，它会尝试重新创建数据库并失败。但是数据库存在，我希望它能够连接并使用这个数据库。

该网站由1and1托管，我有一个MSSQL数据库。我使用以下连接字符串：

<connectionStrings>
    <add name="BlogAppDB"
     connectionString="data source=db123456789.db.1and1.com;
        Integrated Security=false;
        Initial Catalog=db123456789;
        uid=dbo123456789;pwd=MyPassword"
      providerName="System.Data.SqlClient" />
  </connectionStrings>

（为安全起见，此处更改了数字和密码。）

上下文类如下：

public class BlogAppContext : IdentityDbContext<ApplicationUser>
{
    public IDbSet<Blog> Blogs { get; set; }
    public IDbSet<Category> Categories { get; set; }

    public BlogAppContext()
            : base("BlogAppDB")
    {
    }
    public static BlogAppContext Create()
    {
        return new BlogAppContext();
    }
}

当代码试图在这段代码中执行最后一行时会出现问题：

public class BlogController : Controller
{
    private BlogAppContext db = new BlogAppContext();

    // GET: Blog
    public ActionResult Index()
    {
        BlogViewModel viewModel = new BlogViewModel();
        var blogs = db.Blogs.AsQueryable();
        var cats = db.Categories.AsQueryable();
        viewModel.Blogs = from b in blogs where ((b.Status == BlogStatus.Publish) && (b.PublishDate <= DateTime.Now)) select b;

但是，每当我尝试在本地计算机上使用本地数据库的网站时，它都能正常工作。

完整错误是：

    [SqlException (0x80131904): CREATE DATABASE permission denied in database 'master'.]
   System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +2440274
   System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction) +5765240
   System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +285
   System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) +4169
   System.Data.SqlClient.SqlCommand.RunExecuteNonQueryTds(String methodName, Boolean async, Int32 timeout, Boolean asyncWrite) +948
   System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(TaskCompletionSource`1 completion, String methodName, Boolean sendToPipe, Int32 timeout, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry) +286
   System.Data.SqlClient.SqlCommand.ExecuteNonQuery() +286
   System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.<NonQuery>b__0(DbCommand t, DbCommandInterceptionContext`1 c) +10
   System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch(TTarget target, Func`3 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed) +72
   System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.NonQuery(DbCommand command, DbCommandInterceptionContext interceptionContext) +356
   System.Data.Entity.SqlServer.<>c__DisplayClass1a.<CreateDatabaseFromScript>b__19(DbConnection conn) +119
   System.Data.Entity.SqlServer.<>c__DisplayClass33.<UsingConnection>b__32() +443
   System.Data.Entity.SqlServer.<>c__DisplayClass1.<Execute>b__0() +10
   System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func`1 operation) +189
   System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Action operation) +78
   System.Data.Entity.SqlServer.SqlProviderServices.UsingConnection(DbConnection sqlConnection, Action`1 act) +175
   System.Data.Entity.SqlServer.SqlProviderServices.UsingMasterConnection(DbConnection sqlConnection, Action`1 act) +557
   System.Data.Entity.SqlServer.SqlProviderServices.CreateDatabaseFromScript(Nullable`1 commandTimeout, DbConnection sqlConnection, String createDatabaseScript) +86
   System.Data.Entity.SqlServer.SqlProviderServices.DbCreateDatabase(DbConnection connection, Nullable`1 commandTimeout, StoreItemCollection storeItemCollection) +164
   System.Data.Entity.Core.Common.DbProviderServices.CreateDatabase(DbConnection connection, Nullable`1 commandTimeout, StoreItemCollection storeItemCollection) +76
   System.Data.Entity.Core.Objects.ObjectContext.CreateDatabase() +134
   System.Data.Entity.Migrations.Utilities.DatabaseCreator.Create(DbConnection connection) +119
   System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists(Action mustSucceedToKeepDatabase) +142
   System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration) +78
   System.Data.Entity.Internal.DatabaseCreator.CreateDatabase(InternalContext internalContext, Func`3 createMigrator, ObjectContext objectContext) +89
   System.Data.Entity.Internal.InternalContext.CreateDatabase(ObjectContext objectContext, DatabaseExistenceState existenceState) +116
   System.Data.Entity.Database.Create(DatabaseExistenceState existenceState) +218
   System.Data.Entity.CreateDatabaseIfNotExists`1.InitializeDatabase(TContext context) +149
   System.Data.Entity.Internal.<>c__DisplayClassf`1.<CreateInitializationAction>b__e() +76
   System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action) +60
   System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization() +357
   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) +198
   System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase() +73
   System.Data.Entity.Internal.InternalContext.GetEntitySetAndBaseTypeForType(Type entityType) +28
   System.Data.Entity.Internal.Linq.InternalSet`1.Initialize() +53
   System.Data.Entity.Internal.Linq.InternalSet`1.get_InternalContext() +15
   System.Data.Entity.Infrastructure.DbQuery`1.System.Linq.IQueryable.get_Provider() +38
   System.Linq.Queryable.Where(IQueryable`1 source, Expression`1 predicate) +83
   BlogApp.Controllers.BlogController.Index() in C:\Users\ranth\Documents\Projects\Blog\Blog\Controllers\BlogController.cs:25
   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) +157
   System.Web.Mvc.ControllerActionInvoker.InvokeActionMethod(ControllerContext controllerContext, ActionDescriptor actionDescriptor, IDictionary`2 parameters) +27
   System.Web.Mvc.Async.AsyncControllerActionInvoker.<BeginInvokeSynchronousActionMethod>b__39(IAsyncResult asyncResult, ActionInvocation innerInvokeState) +22
   System.Web.Mvc.Async.WrappedAsyncResult`2.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethod(IAsyncResult asyncResult) +32
   System.Web.Mvc.Async.AsyncInvocationWithFilters.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3d() +50
   System.Web.Mvc.Async.<>c__DisplayClass46.<InvokeActionMethodFilterAsynchronouslyRecursive>b__3f() +228
   System.Web.Mvc.Async.<>c__DisplayClass33.<BeginInvokeActionMethodWithFilters>b__32(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +34
   System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +26
   System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +100
   System.Web.Mvc.Async.WrappedAsyncResult`1.CallEndDelegate(IAsyncResult asyncResult) +10
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +27
   System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +13
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +36
   System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult asyncResult, Controller controller) +12
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +22
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +26
   System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +10
   System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +21
   System.Web.Mvc.Async.WrappedAsyncVoid`1.CallEndDelegate(IAsyncResult asyncResult) +29
   System.Web.Mvc.Async.WrappedAsyncResultBase`1.End() +49
   System.Web.Mvc.MvcHandler.EndProcessRequest(IAsyncResult asyncResult) +28
   System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest(IAsyncResult result) +9
   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9987157
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +155

Answer 1

我没有在您的连接字符串中看到任何名称，如您所知，您的上下文名称和连接字符串名称相同，因此您要检查此...

<add name="**BlogAppDB**" 
 connectionString="Data Source=.\SQLEXPRESS;Initial Catalog=x;Integrated Security=False" 
 providerName="System.Data.SqlClient;User ID=x;Password=x"/>

请试试这个

Answer 2

从错误看，您用于连接到数据库服务器的用户没有所需的权限。如果您的数据库不存在，那么默认情况下实体框架将为您创建它。缺点是您的用户必须拥有此权限。您可以向他授予此权限（这对于生产环境来说是不理想的，甚至是不可能的）或创建迁移脚本，然后使用具有提升权限的用户来运行此脚本，但在具有较低权限的应用程序用户中使用（出于安全目的）。

Answer 3

尝试了几个解决方案但没有成功，我从数据库导出数据，创建了一个新数据库并将数据导入到这个版本中。

当我将连接字符串更改为指向新数据库时，一切正常。

旧数据库必定存在问题（托管该网站的公司无法解决问题所在。）