Question

我搜索了这个论坛，我能找到的最接近我问题的是：EF Codefirst Winforms app - Connection string problems。那个线程没有解决，所以我希望我有更好的运气。

我有一个使用Visual Studio 2013用C＃编写的Winforms应用程序。应用程序（通过EF Code First）创建一个数据库（如果它尚不存在）。它从Dev环境运行时按计划工作。但是，当我创建安装程序（右键单击 - ＆gt;发布）并在同一台计算机上安装的版本时，它首次尝试创建数据库时会引发以下错误：

System.ArgumentException: Expansion of |DataDirectory| failed while processing the connection string. Ensure that |DataDirectory| is set to a valid fully-qualified path.
  at System.Data.Entity.Core.Common.DbProviderServices.ExpandDataDirectory(String path)
  at System.Data.Entity.SqlServer.SqlProviderServices.GetOrGenerateDatabaseNameAndGetFileNames(SqlConnection sqlConnection, String& databaseName, String& dataFileName, String& logFileName)
  at System.Data.Entity.SqlServer.SqlProviderServices.DbCreateDatabase(DbConnection connection, Nullable`1 commandTimeout, StoreItemCollection storeItemCollection)
  at System.Data.Entity.Core.Common.DbProviderServices.CreateDatabase(DbConnection connection, Nullable`1 commandTimeout, StoreItemCollection storeItemCollection)
  at System.Data.Entity.Core.Objects.ObjectContext.CreateDatabase()
  at System.Data.Entity.Migrations.Utilities.DatabaseCreator.Create(DbConnection connection)
  at System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists(Action mustSucceedToKeepDatabase)
  at System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration)
  at System.Data.Entity.Internal.DatabaseCreator.CreateDatabase(InternalContext internalContext, Func`3 createMigrator, ObjectContext objectContext)
  at System.Data.Entity.Internal.InternalContext.CreateDatabase(ObjectContext objectContext, DatabaseExistenceState existenceState)
  at System.Data.Entity.Database.Create(DatabaseExistenceState existenceState)
  at System.Data.Entity.CreateDatabaseIfNotExists`1.InitializeDatabase(TContext context)
  at System.Data.Entity.Internal.InternalContext.<>c__DisplayClassf`1.<CreateInitializationAction>b__e()
  at System.Data.Entity.Internal.InternalContext.PerformInitializationAction(Action action)
  at System.Data.Entity.Internal.InternalContext.PerformDatabaseInitialization()
  at System.Data.Entity.Internal.LazyInternalContext.<InitializeDatabase>b__4(InternalContext c)
  at System.Data.Entity.Internal.RetryAction`1.PerformAction(TInput input)
  at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabaseAction(Action`1 action)
  at System.Data.Entity.Internal.LazyInternalContext.InitializeDatabase()
  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.get_InternalContext()
  at System.Data.Entity.Infrastructure.DbQuery`1.System.Linq.IQueryable.get_Provider()
  at System.Linq.Queryable.Count[TSource](IQueryable`1 source)
  at ImageEditor.WinForms.frmCropProfile.OnLoad(EventArgs e)
  at System.Windows.Forms.Form.OnCreateControl()
  at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)
  at System.Windows.Forms.Control.CreateControl()
  at System.Windows.Forms.Control.WmShowWindow(Message& m)
  at System.Windows.Forms.Control.WndProc(Message& m)
  at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
  at System.Windows.Forms.ContainerControl.WndProc(Message& m)
  at System.Windows.Forms.Form.WmShowWindow(Message& m)
  at System.Windows.Forms.Form.WndProc(Message& m)
  at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
  at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
  at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)

显然，我缺少一些东西。我承认，我不确定EF在幕后做什么，但我想我需要弄明白。但这不是那种失败的目的吗？我可以在SQL Server对象资源管理器（（localdb）\ MSSQLLocalDB）中看到它创建的数据库。与其他线程一样，我在任何XML配置文件中都找不到连接字符串。

此代码：

MessageBox.Show(_context.Database.Connection.ConnectionString.ToString());

返回：

Data Source=(localdb)\mssqllocaldb;InitialCatalog=MyApp.MyAppDataEntities;Integrated Security=True;MultipleActiveResultSets=True

非常感谢任何想法。

发布使用EF Code First的Winforms应用程序

0 个答案: