У меня есть база данных с именем SalesERPDB, и я пытаюсь создать новую таблицу «TblEmployee», но получаю исключение при ее создании.Entity framework table create C#
public class SalesERPDB : DbContext
{
public SalesERPDB() : base("SalesERPDB")
{
}
public DbSet<Employee> Employees { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<Employee>().ToTable("TblEmployee");
base.OnModelCreating(modelBuilder);
}
}
класс EmployeeBusinessLayer (где у меня есть метод GetEmployees(), чтобы получить список сотрудников):
public class EmployeeBusinessLayer
{
public List<Employee> GetEmployees()
{
SalesERPDB salesDal = new SalesERPDB();
return salesDal.Employees.ToList(); // Getting an exception in this line.
}
}
Сотрудник Класс:
public class Employee
{
[Key]
public int EmployeeId { get; set; }
public string FName { get; set; }
public string LName { get; set; }
public int Salary { get; set; }
}
Я могу ударить тот же строка подключения из другого приложения. Строка
соединения:
<connectionStrings>
<add name="SalesERPDB" connectionString="Data Source=CSCINDAI406933\\SQLEXPRESS;Initial Catalog=SalesERPDB;Integrated Security=True;" providerName="System.Data.SQLClient"></add>
Сведения об исключении:
Описание: Исключение типа 'System.InvalidOperationException' произошло в EntityFramework.dll, но не был обработан в пользовательском коде
Сведения об исключении: System.InvalidOperationException: Ошибка экземпляра. Трассировка стека: [InvalidOperationException: Ошибка экземпляра.] System.Web.Mvc.Async. <> c__DisplayClass46.b__3f() +323 System.Data.ProviderBase.DbConnectionPool.TryGetConnection (DbConnection owningObject, TaskCompletionSource 1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +78 System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource
1 повторов, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal & соединение) +191 System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal (DbConnection outerConnection, DbConnectionFactory ConnectionFactory, TaskCompletionSource 1 retry, DbConnectionOptions userOptions) +119 System.Web.Mvc.Async.<>c__DisplayClass33.<BeginInvokeActionMethodWithFilters>b__32(IAsyncResult asyncResult) +44 System.Web.Mvc.Async.WrappedAsyncResult
1.CallEndDelegate (IAsyncResult AsyncResult) +47 System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +136 System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +102 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeActionMethodWithFilters(IAsyncResult asyncResult) +50 System.Web.Mvc.Async.<>c__DisplayClass2b.<BeginInvokeAction>b__1c() +72 System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource
1 повторных попыток, DbConnectionOptions userOptions) +154 System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection (DbConnection outerConnection , DbConnectionFactory connectionFactory, TaskCompletionSource 1 retry, DbConnectionOptions userOptions) +21 System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource
1 повторных попыток) +141 System.Data.SqlClient.SqlConnection.TryOpen (TaskCompletionSource 1 retry) +362 System.Data.SqlClient.SqlConnection.Open() +96 System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.<Open>b__36(DbConnection t, DbConnectionInterceptionContext c) +12 System.Data.Entity.Infrastructure.Interception.InternalDispatcher
1.Dispatch (TTarget цель, действие 2 operation, TInterceptionContext interceptionContext, Action
3 исполнения, Действие 3 executed) +72 System.Data.Entity.Infrastructure.Interception.DbConnectionDispatcher.Open(DbConnection connection, DbInterceptionContext interceptionContext) +405 System.Data.Entity.SqlServer.<>c__DisplayClass33.<UsingConnection>b__32() +459 System.Data.Entity.SqlServer.<>c__DisplayClass1.<Execute>b__0() +15 System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute(Func
1 операция) +190 System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute (операция Действие): +82 System.Data.Entity.SqlServer.SqlProviderServices.UsingConnection (DbConnection SqlConnection, Действие 1 act) +194 System.Data.Entity.SqlServer.SqlProviderServices.UsingMasterConnection(DbConnection sqlConnection, Action
1 акт) +427 System.Data.Entity.SqlServer.SqlProviderServices.CheckDatabaseExists (SqlConnection SqlConnection, Nullable 1 commandTimeout, String databaseName) +86 System.Data.Entity.SqlServer.SqlProviderServices.DbDatabaseExists(DbConnection connection, Nullable
1 CommandTimeout, Lazy 1 storeItemCollection) +347 System.Data.Entity.Core.Common.DbProviderServices.DatabaseExists(DbConnection connection, Nullable
1 commandTimeout, Lazy 1 storeItemCollection) +122 System.Web.Mvc.Async.<>c__DisplayClass21.<BeginInvokeAction>b__1e(IAsyncResult asyncResult) +185 System.Web.Mvc.Async.WrappedAsyncResult
1.CallEndDelegate (IAsyncResult asyncResult) +42 System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +133 System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +56 System.Web.Mvc.Async.AsyncControllerActionInvoker.EndInvokeAction(IAsyncResult asyncResult) +40 System.Web.Mvc.Controller.<BeginExecuteCore>b__1d(IAsyncResult asyncResult, ExecuteCoreState innerState) +34 System.Web.Mvc.Async.WrappedAsyncVoid
1.C allEndDelegate (IAsyncResult AsyncResult) +70 System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +133 System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +56 System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +37 System.Web.Mvc.Controller.EndExecuteCore(IAsyncResult asyncResult) +44 System.Web.Mvc.Controller.<BeginExecute>b__15(IAsyncResult asyncResult, Controller controller) +39 System.Web.Mvc.Async.WrappedAsyncVoid
1.CallEndDelegate (IAsyncResult AsyncResult) +62 System.Web.Mvc.Async.WrappedAsyncResultBase 1.End() +133 System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +56 System.Web.Mvc.Async.AsyncResultWrapper.End(IAsyncResult asyncResult, Object tag) +37 System.Web.Mvc.Controller.EndExecute(IAsyncResult asyncResult) +39 System.Web.Mvc.Controller.System.Web.Mvc.Async.IAsyncController.EndExecute(IAsyncResult asyncResult) +39 System.Web.Mvc.MvcHandler.<BeginProcessRequest>b__5(IAsyncResult asyncResult, ProcessRequestState innerState) +39 System.Web.Mvc.Async.WrappedAsyncVoid
1.CallEndDelegate (IAsyncResult AsyncResult) +70 системы. Web.Mvc.Async.WrappedAsyncResultBase`1.End() +133 System.Web.Mvc.Async.AsyncResultWrapper.End (IAsyncResult asyncResult, Object tag) +56 System.Web.Mvc.Async.AsyncResultWrapper.End (IAsyncResult asyncResult, тег объекта). System.Web.Mvc.MvcHandler.EndProcessRequest (IAsyncResult AsyncResult) + 40 System.Web.Mvc.MvcHandler.System.Web.IHttpAsyncHandler.EndProcessRequest (IAsyncResult результат) +38 System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +9644037 System.Web.HttpApplication.ExecuteStep (IExecutionStep шаг, Boolean & completedSynchronously) +155
Исправление этой проблемы будет очень ценна. Заранее спасибо.
обновление ур вопрос с строки подключения –
@MidhunMundayadan Обновленный вопрос с ConnectionString – Manju