Я создал новое решение XAF Blazor и смог запустить его для создания базы данных. Затем я добавил миграцию базы данных в соответствии с этим вопросом Однако, когда я запускаю миграцию из диспетчера пакетов, я получаю
Microsoft.Data.SqlClient.SqlException (0x80131904): A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: SNI_PN11, error: 50 - Local Database Runtime error occurred. Specified LocalDB instance name is invalid.
)
---> System.ComponentModel.Win32Exception (0x89C5011B): Unknown error (0x89c5011b)
at Microsoft.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action`1 wrapCloseInAction)
at Microsoft.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose)
at Microsoft.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover, SqlAuthenticationMethod authType)
at Microsoft.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover)
at Microsoft.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout)
at Microsoft.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance)
at Microsoft.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, Boolean applyTransientFaultHandling, String accessToken, DbConnectionPool pool)
at Microsoft.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
at Microsoft.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup, DbConnectionOptions userOptions)
at Microsoft.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection)
at Microsoft.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
at Microsoft.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
at Microsoft.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry, SqlConnectionOverrides overrides)
at Microsoft.Data.SqlClient.SqlConnection.Open(SqlConnectionOverrides overrides)
at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerConnection.OpenDbConnection(Boolean errorsExpected)
at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.OpenInternal(Boolean errorsExpected)
at Microsoft.EntityFrameworkCore.Storage.RelationalConnection.Open(Boolean errorsExpected)
at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerDatabaseCreator.<>c__DisplayClass18_0.<Exists>b__0(DateTime giveUp)
at Microsoft.EntityFrameworkCore.ExecutionStrategyExtensions.<>c__DisplayClass12_0`2.<Execute>b__0(DbContext c, TState s)
at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerExecutionStrategy.Execute[TState,TResult](TState state, Func`3 operation, Func`3 verifySucceeded)
at Microsoft.EntityFrameworkCore.ExecutionStrategyExtensions.Execute[TState,TResult](IExecutionStrategy strategy, TState state, Func`2 operation, Func`2 verifySucceeded)
at Microsoft.EntityFrameworkCore.ExecutionStrategyExtensions.Execute[TState,TResult](IExecutionStrategy strategy, TState state, Func`2 operation)
at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerDatabaseCreator.Exists(Boolean retryOnNotExists)
at Microsoft.EntityFrameworkCore.SqlServer.Storage.Internal.SqlServerDatabaseCreator.Exists()
at Microsoft.EntityFrameworkCore.Migrations.HistoryRepository.Exists()
at Microsoft.EntityFrameworkCore.Migrations.Internal.Migrator.Migrate(String targetMigration)
at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.UpdateDatabase(String targetMigration, String connectionString, String contextType)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.UpdateDatabaseImpl(String targetMigration, String connectionString, String contextType)
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.UpdateDatabase.<>c__DisplayClass0_0.<.ctor>b__0()
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
ClientConnectionId:00000000-0000-0000-0000-000000000000
Error Number:-1983577829,State:0,Class:20
A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections.
(provider: SNI_PN11, error: 50 - Local Database Runtime error occurred. Specified LocalDB instance name is invalid.
)
Этот вопрос не дублирует этот вопрос о подключении к SQL Server, поскольку программа могла получить доступ к базе данных до того, как я создал миграцию.
[Обновлять]
Код
using DevExpress.ExpressApp.EFCore.Updating;
using Microsoft.EntityFrameworkCore;
using DevExpress.Persistent.BaseImpl.EF.PermissionPolicy;
using DevExpress.Persistent.BaseImpl.EF;
using DevExpress.ExpressApp.Design;
using DevExpress.ExpressApp.EFCore.DesignTime;
using DevExpress.Persistent.Base;
using Microsoft.EntityFrameworkCore.Design;
namespace ExamBuddy.Module.BusinessObjects {
public class ExamBuddyContextInitializer : DbContextTypesInfoInitializerBase {
protected override DbContext CreateDbContext() {
var builder = new DbContextOptionsBuilder<ExamBuddyEFCoreDbContext>()
.UseSqlServer(@";");
return new ExamBuddyEFCoreDbContext(builder.Options);
}
}
public class ExamBuddyContextFactory : IDesignTimeDbContextFactory<ExamBuddyEFCoreDbContext>
{
public ExamBuddyEFCoreDbContext CreateDbContext(string[] args)
{
var optionsBuilder = new DbContextOptionsBuilder<ExamBuddyEFCoreDbContext>();
optionsBuilder.UseSqlServer(@"Integrated Security=SSPI;MultipleActiveResultSets=true;Pooling=false;Data Source=(localdb)\\mssqllocaldb;Initial Catalog=ExamBuddy;ConnectRetryCount=0;");
return new ExamBuddyEFCoreDbContext(optionsBuilder.Options);
}
}
[TypesInfoInitializer(typeof(ExamBuddyContextInitializer))]
public class ExamBuddyEFCoreDbContext : DbContext {
public ExamBuddyEFCoreDbContext(DbContextOptions<ExamBuddyEFCoreDbContext> options) : base(options) {
}
public DbSet<ModuleInfo> ModulesInfo { get; set; }
public DbSet<ModelDifference> ModelDifferences { get; set; }
public DbSet<ModelDifferenceAspect> ModelDifferenceAspects { get; set; }
public DbSet<PermissionPolicyRole> Roles { get; set; }
public DbSet<PermissionPolicyRoleBase> RolesBase { get; set; }
public DbSet<PermissionPolicyUser> Users { get; set; }
}
[Обновлять]
Я попытался прокомментировать атрибут Dev Express TypesInfoInitializer, который я попытался добавить в следующем, но он не выполняется (ошибка не выдает), тогда как если я помещаю ошибку в метод IDesignTimeDbContextFactory, он выдаст
public class MigrationsContextFactory : IDbContextFactory<ExamBuddyEFCoreDbContext>
{
public ExamBuddyEFCoreDbContext CreateDbContext()
{
throw new Exception("In Migration Context");
var optionsBuilder = new DbContextOptionsBuilder<ExamBuddyEFCoreDbContext>();
optionsBuilder.UseSqlServer(@"Integrated Security=SSPI;MultipleActiveResultSets=true;Pooling=false;Data Source=(localdb)\\mssqllocaldb;Initial Catalog=ExamBuddy;ConnectRetryCount=0;");
return new ExamBuddyEFCoreDbContext(optionsBuilder.Options);
}
}
Метод ExamBuddyContextFactory выполняет
[Обновлять]
Когда я редактирую строку подключения, чтобы использовать только 1 обратную косую черту, я вижу следующие сообщения в Visual Studio 2019
Таким образом, миграция будет сгенерирована с двойной обратной косой чертой в строке подключения, но не будет запущена.
