Ricevo un'eccezione quando provo a decodificare un database nel codice EF5 prima

Question

Questo video mostra come utilizzare Code First da un database esistente. http://msdn.microsoft.com/en-us/data/jj572367

Quindi uso nuget per installare EF Power Tools e seleziono il mio progetto, tasto destro del mouse e scegliere; Entity Framework -> Reverse Engineer Code First. Seleziono il database come descritto, ma ottengo la seguente eccezione quando faccio clic su OK;

System.Data.ProviderIncompatibleException: The provider did not return a ProviderManifestToken string. ---> System.InvalidOperationException: This operation requires a connection to the 'master' database. Unable to create a connection to the 'master' database because the original database connection has been opened and credentials have been removed from the connection string. Supply an unopened connection. ---> System.Data.SqlClient.SqlException: Login failed for user 'ictdev'. 
    at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) 
    at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning() 
    at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) 
    at System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK) 
    at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, SqlConnection owningObject) 
    at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, TimeoutTimer timeout) 
    at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, TimeoutTimer timeout, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) 
    at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, Object providerInfo, String newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) 
    at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection) 
    at System.Data.ProviderBase.DbConnectionFactory.CreateNonPooledConnection(DbConnection owningConnection, DbConnectionPoolGroup poolGroup) 
    at System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) 
    at System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) 
    at System.Data.SqlClient.SqlConnection.Open() 
    at System.Data.SqlClient.SqlProviderServices.UsingConnection(SqlConnection sqlConnection, Action`1 act) 
    at System.Data.SqlClient.SqlProviderServices.UsingMasterConnection(SqlConnection sqlConnection, Action`1 act) 
    --- End of inner exception stack trace --- 
    at System.Data.SqlClient.SqlProviderServices.UsingMasterConnection(SqlConnection sqlConnection, Action`1 act) 
    at System.Data.SqlClient.SqlProviderServices.GetDbProviderManifestToken(DbConnection connection) 
    at System.Data.Common.DbProviderServices.GetProviderManifestToken(DbConnection connection) 
    --- End of inner exception stack trace --- 
    at System.Data.Common.DbProviderServices.GetProviderManifestToken(DbConnection connection) 
    at System.Data.Entity.Design.EntityStoreSchemaGenerator.GetProviderSchemaMetadataWorkspace(DbProviderServices providerServices, DbConnection providerConnection) 
    at System.Data.Entity.Design.EntityStoreSchemaGenerator.CreateStoreSchemaConnection(String providerInvariantName, String connectionString) 
    at System.Data.Entity.Design.EntityStoreSchemaGenerator..ctor(String providerInvariantName, String connectionString, String namespaceName) 
    at Microsoft.DbContextPackage.Handlers.ReverseEngineerCodeFirstHandler.ReverseEngineerCodeFirst(Project project) 

Quindi la domanda è come posso risolvere questo?

Answer 1

Ho trovato la soluzione sui commenti della pagina Web del prodotto EF Power Tools; http://visualstudiogallery.msdn.microsoft.com/72a60b14-1581-4b9b-89f2-846072eff19d

Nella procedura guidata di connessione, fare clic su Avanzate e il valore di Persist Security Info deve essere True.

Se qualcuno può rispondere alla domanda originale e spiegare cosa sta succedendo quando si esegue questa operazione, potrei spuntare la risposta!