Zaraz rzucę tym wszystkim w cholerę. Na każdym kroku visual studio wywala mi błędy. Próbuje nauczyć się tworzyć strony w ASP MVC. Zrobiłem sobie:
Context
namespace StoreProject.DAL
{
using StoreProject.Models;
using System;
using System.Data.Entity;
using System.Linq;
public class StoreContext : DbContext
{
// Your context has been configured to use a 'StoreContext' connection string from your application's
// configuration file (App.config or Web.config). By default, this connection string targets the
// 'StoreProject.DAL.StoreContext' database on your LocalDb instance.
//
// If you wish to target a different database and/or database provider, modify the 'StoreContext'
// connection string in the application configuration file.
public StoreContext()
: base("name=StoreDb")
{
}
static StoreContext()
{
Database.SetInitializer<StoreContext>(new StoreInitializer());
}
// Add a DbSet for each entity type that you want to include in your model. For more information
// on configuring and using a Code First model, see http://go.microsoft.com/fwlink/?LinkId=390109.
public virtual DbSet<Product> Products { get; set; }
}
//public class MyEntity
//{
// public int Id { get; set; }
// public string Name { get; set; }
//}
}
Model klasty product:
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;
namespace StoreProject.Models
{
public class Product
{
public int ProductId { get; set; }
[Required(ErrorMessage = "Wprowadź nazwę")]
public string Name { get; set; }
public string Country { get; set; }
[Required(ErrorMessage = "Wprowadź cenę")]
public float Price { get; set; }
}
StoreInitializer sobie też zrobiłem:
using StoreProject.Models;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Linq;
using System.Web;
using StoreProject.Migrations;
namespace StoreProject.DAL
{
public class StoreInitializer : MigrateDatabaseToLatestVersion<StoreContext, Configuration>
{
public static void SeedStoreData(StoreContext context)
{
var products = new List<Product>
{
new Product(){Name = "Czekolada biała",Price = 2.20f, Country = "Madagaskar"},
new Product(){Name = "CzekoladaCzarna", Price=3.30f, Country = "Belgia"}
};
products.ForEach(a => context.Products.AddOrUpdate(a));
context.SaveChanges();
}
}
}
Migrację też dodałem:
using StoreProject.DAL;
namespace StoreProject.Migrations
{
using System;
using System.Data.Entity;
using System.Data.Entity.Migrations;
using System.Linq;
public sealed class Configuration : DbMigrationsConfiguration<StoreProject.DAL.StoreContext>
{
public Configuration()
{
AutomaticMigrationsEnabled = false;
ContextKey = "StoreProject.DAL.StoreContext";
}
protected override void Seed(StoreProject.DAL.StoreContext context)
{
StoreInitializer.SeedStoreData(context);
// This method will be called after migrating to the latest version.
// You can use the DbSet<T>.AddOrUpdate() helper extension method
// to avoid creating duplicate seed data.
}
}
}
I myślałem, że za każdym razem jak będę uruchamiał aplikację to nie będzie mi dodawało znów tych samych danych, ale tak się nie stało. Postanowiłem usunąć całą tabele z bazy danych z myślą, że jak odpalę to się utworzy znowu tabela Products i mi wstawi tam te dwa produkty, ale wywaliło mi błąd -
System.Data.Entity.Core.EntityCommandExecutionException
HResult=0x8013193C
Message=An error occurred while executing the command definition. See the inner exception for details.
Source=EntityFramework
Ślad stosu:
w System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior)
w System.Data.Entity.Core.Objects.Internal.ObjectQueryExecutionPlan.Execute[TResultType](ObjectContext context, ObjectParameterCollection parameterValues)
w System.Data.Entity.Core.Objects.ObjectQuery`1.<>c__DisplayClass7.<GetResults>b__6()
w System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)
w System.Data.Entity.Core.Objects.ObjectQuery`1.<>c__DisplayClass7.<GetResults>b__5()
w System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)
w System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
w System.Data.Entity.Core.Objects.ObjectQuery`1.<System.Collections.Generic.IEnumerable<T>.GetEnumerator>b__0()
w System.Data.Entity.Internal.LazyEnumerator`1.MoveNext()
w System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__2[TResult](IEnumerable`1 sequence)
w System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.ExecuteSingle[TResult](IEnumerable`1 query, Expression queryRoot)
w System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute[TResult](Expression expression)
w System.Data.Entity.Internal.Linq.DbQueryProvider.Execute[TResult](Expression expression)
w System.Data.Entity.Migrations.DbSetMigrationsExtensions.AddOrUpdate[TEntity](DbSet`1 set, IEnumerable`1 identifyingProperties, InternalSet`1 internalSet, TEntity[] entities)
w System.Data.Entity.Migrations.DbSetMigrationsExtensions.AddOrUpdate[TEntity](IDbSet`1 set, TEntity[] entities)
w StoreProject.DAL.StoreInitializer.<>c__DisplayClass0_0.<SeedStoreData>b__0(Product a) w C:\Users\krysw\source\repos\StoreWebsite\StoreProject\DAL\StoreInitializer.cs:wiersz 23
w System.Collections.Generic.List`1.ForEach(Action`1 action)
w StoreProject.DAL.StoreInitializer.SeedStoreData(StoreContext context) w C:\Users\krysw\source\repos\StoreWebsite\StoreProject\DAL\StoreInitializer.cs:wiersz 23
w StoreProject.Migrations.Configuration.Seed(StoreContext context) w C:\Users\krysw\source\repos\StoreWebsite\StoreProject\Migrations\Configuration.cs:wiersz 20
w System.Data.Entity.Migrations.DbMigrationsConfiguration`1.OnSeed(DbContext context)
w System.Data.Entity.Migrations.DbMigrator.SeedDatabase()
w System.Data.Entity.Migrations.DbMigrator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)
w System.Data.Entity.Migrations.DbMigrator.UpdateInternal(String targetMigration)
w System.Data.Entity.Migrations.DbMigrator.<>c__DisplayClasse.<Update>b__d()
w System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists(Action mustSucceedToKeepDatabase)
Wewnętrzny wyjątek 1:
SqlException: Invalid object name 'dbo.Products'.
Spróbowałem więc użyć komendy "update-database", ale też pojawił się błąd -
PM> update-database
Specify the '-Verbose' flag to view the SQL statements being applied to the target database.
No pending explicit migrations.
Running Seed method.
System.Data.Entity.Core.EntityCommandExecutionException: An error occurred while executing the command definition. See the inner exception for details. ---> System.Data.SqlClient.SqlException: Invalid object name 'dbo.Products'.
w System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
w System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
w System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
w System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady)
w System.Data.SqlClient.SqlDataReader.TryConsumeMetaData()
w System.Data.SqlClient.SqlDataReader.get_MetaData()
w System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted)
w System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest)
w System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry)
w System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method)
w System.Data.SqlClient.SqlCommand.ExecuteReader(CommandBehavior behavior, String method)
w System.Data.SqlClient.SqlCommand.ExecuteDbDataReader(CommandBehavior behavior)
w System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior)
w System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.<Reader>b__c(DbCommand t, DbCommandInterceptionContext`1 c)
w System.Data.Entity.Infrastructure.Interception.InternalDispatcher`1.Dispatch[TTarget,TInterceptionContext,TResult](TTarget target, Func`3 operation, TInterceptionContext interceptionContext, Action`3 executing, Action`3 executed)
w System.Data.Entity.Infrastructure.Interception.DbCommandDispatcher.Reader(DbCommand command, DbCommandInterceptionContext interceptionContext)
w System.Data.Entity.Internal.InterceptableDbCommand.ExecuteDbDataReader(CommandBehavior behavior)
w System.Data.Common.DbCommand.ExecuteReader(CommandBehavior behavior)
w System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior)
--- Koniec śladu stosu wyjątków wewnętrznych ---
w System.Data.Entity.Core.EntityClient.Internal.EntityCommandDefinition.ExecuteStoreCommands(EntityCommand entityCommand, CommandBehavior behavior)
w System.Data.Entity.Core.Objects.Internal.ObjectQueryExecutionPlan.Execute[TResultType](ObjectContext context, ObjectParameterCollection parameterValues)
w System.Data.Entity.Core.Objects.ObjectQuery`1.<>c__DisplayClass7.<GetResults>b__6()
w System.Data.Entity.Core.Objects.ObjectContext.ExecuteInTransaction[T](Func`1 func, IDbExecutionStrategy executionStrategy, Boolean startLocalTransaction, Boolean releaseConnectionOnSuccess)
w System.Data.Entity.Core.Objects.ObjectQuery`1.<>c__DisplayClass7.<GetResults>b__5()
w System.Data.Entity.SqlServer.DefaultSqlExecutionStrategy.Execute[TResult](Func`1 operation)
w System.Data.Entity.Core.Objects.ObjectQuery`1.GetResults(Nullable`1 forMergeOption)
w System.Data.Entity.Core.Objects.ObjectQuery`1.<System.Collections.Generic.IEnumerable<T>.GetEnumerator>b__0()
w System.Data.Entity.Internal.LazyEnumerator`1.MoveNext()
w System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable`1 source)
w System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.<GetElementFunction>b__2[TResult](IEnumerable`1 sequence)
w System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.ExecuteSingle[TResult](IEnumerable`1 query, Expression queryRoot)
w System.Data.Entity.Core.Objects.ELinq.ObjectQueryProvider.System.Linq.IQueryProvider.Execute[TResult](Expression expression)
w System.Data.Entity.Internal.Linq.DbQueryProvider.Execute[TResult](Expression expression)
w System.Linq.Queryable.SingleOrDefault[TSource](IQueryable`1 source, Expression`1 predicate)
w System.Data.Entity.Migrations.DbSetMigrationsExtensions.AddOrUpdate[TEntity](DbSet`1 set, IEnumerable`1 identifyingProperties, InternalSet`1 internalSet, TEntity[] entities)
w System.Data.Entity.Migrations.DbSetMigrationsExtensions.AddOrUpdate[TEntity](IDbSet`1 set, TEntity[] entities)
w StoreProject.DAL.StoreInitializer.<>c__DisplayClass0_0.<SeedStoreData>b__0(Product a) w C:\Users\krysw\source\repos\StoreWebsite\StoreProject\DAL\StoreInitializer.cs:wiersz 23
w System.Collections.Generic.List`1.ForEach(Action`1 action)
w StoreProject.DAL.StoreInitializer.SeedStoreData(StoreContext context) w C:\Users\krysw\source\repos\StoreWebsite\StoreProject\DAL\StoreInitializer.cs:wiersz 23
w StoreProject.Migrations.Configuration.Seed(StoreContext context) w C:\Users\krysw\source\repos\StoreWebsite\StoreProject\Migrations\Configuration.cs:wiersz 20
w System.Data.Entity.Migrations.DbMigrationsConfiguration`1.OnSeed(DbContext context)
w System.Data.Entity.Migrations.DbMigrator.SeedDatabase()
w System.Data.Entity.Migrations.Infrastructure.MigratorLoggingDecorator.SeedDatabase()
w System.Data.Entity.Migrations.DbMigrator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)
w System.Data.Entity.Migrations.Infrastructure.MigratorLoggingDecorator.Upgrade(IEnumerable`1 pendingMigrations, String targetMigrationId, String lastMigrationId)
w System.Data.Entity.Migrations.DbMigrator.UpdateInternal(String targetMigration)
w System.Data.Entity.Migrations.DbMigrator.<>c__DisplayClasse.<Update>b__d()
w System.Data.Entity.Migrations.DbMigrator.EnsureDatabaseExists(Action mustSucceedToKeepDatabase)
w System.Data.Entity.Migrations.Infrastructure.MigratorBase.EnsureDatabaseExists(Action mustSucceedToKeepDatabase)
w System.Data.Entity.Migrations.DbMigrator.Update(String targetMigration)
w System.Data.Entity.Migrations.Infrastructure.MigratorBase.Update(String targetMigration)
w System.Data.Entity.Migrations.Design.ToolingFacade.UpdateRunner.RunCore()
w System.Data.Entity.Migrations.Design.ToolingFacade.BaseRunner.Run()
An error occurred while executing the command definition. See the inner exception for details.
O co może chodzić?
