Ho creato una libreria basata su .NET 4.6.2 versione.
Alla libreria, ho aggiunto il pacchetto 6.1.3 di EntityFramework.
Ho creato un modello come seguireAbilita-Migrazioni Eccezione chiamata "SetData" con "2" argomento/i
using System;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
namespace Components.Models
{
public class Session
{
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public string Id { get; set; }
[Key]
[Required]
public string Identity { get; set; }
[Required]
public DateTime CreatedAt { get; set; }
[Required]
public DateTime UpdatedAt { get; set; }
}
}
E il DbContext
using System.Configuration;
using System.Data.Entity;
using System.Data.Entity.ModelConfiguration.Conventions;
using Components.Models;
namespace Components.DataContexts
{
public class SessionContext : DbContext
{
public SessionContext() : base(ConfigurationManager.ConnectionStrings["sessiondb"].ConnectionString)
{
}
public DbSet<Session> Sessions { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Conventions.Remove<PluralizingEntitySetNameConvention>();
}
}
}
Poi ho provato a consentire la migrazione e ha fatto tramite
PM> Enable-Migrations
dichiarazione, ha ottenuto il messaggio di errore:
Exception calling "SetData" with "2" argument(s): "Type 'Microsoft.VisualStudio.ProjectSystem.VS.Implementation.Package.Automation.OAProject' in assembly 'Microsoft.VisualStudio.ProjectSystem.VS.Implementation, Version=14.1.0.0, Culture=neutral,
PublicKeyToken=b03f5f7f11d50a3a' is not marked as serializable."At D:\C#\IndustryCloud\packages\EntityFramework.6.1.3\tools\EntityFramework.psm1:720 char:5
+ $domain.SetData('startUpProject', $startUpProject)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : NotSpecified: (:) [], MethodInvocationException
+ FullyQualifiedErrorId : SerializationException
System.NullReferenceException: Object reference not set to an instance of an object.
at System.Data.Entity.Migrations.Extensions.ProjectExtensions.GetProjectTypes(Project project, Int32 shellVersion)
at System.Data.Entity.Migrations.Extensions.ProjectExtensions.IsWebProject(Project project)
at System.Data.Entity.Migrations.MigrationsDomainCommand.GetFacade(String configurationTypeName, Boolean useContextWorkingDirectory)
at System.Data.Entity.Migrations.EnableMigrationsCommand.FindContextToEnable(String contextTypeName)
at System.Data.Entity.Migrations.EnableMigrationsCommand.<>c__DisplayClass2.<.ctor>b__0()
at System.Data.Entity.Migrations.MigrationsDomainCommand.Execute(Action command)
Object reference not set to an instance of an object.
Cosa faccio di sbagliato?
Aggiornamento Qui la struttura, come Projet è costruire
Negli sessiontest.cs, ho scritto il test per il db.
[Test]
public void InsertARow_DbInitial_ExpectDbValue()
{
var sn = new Session()
{
Identity = Random.Generate(15),
CreatedAt = DateTime.Now,
UpdatedAt = DateTime.Now
};
db.Sessions.Add(sn);
db.SaveChanges();
}
Il progetto ComponentsTest, dove ho scritto il test di unità, l'app.config appare come segue:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<connectionStrings>
<add connectionString="Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=Session;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=True;ApplicationIntent=ReadWrite;MultiSubnetFailover=False" name="sessiondb" />
</connectionStrings>
</configuration>
E nella libreria (componente) si app.config:
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<configSections>
<section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
<!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 --></configSections>
<entityFramework>
<defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
<parameters>
<parameter value="mssqllocaldb" />
</parameters>
</defaultConnectionFactory>
<providers>
<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
</providers>
</entityFramework>
<connectionStrings>
<add connectionString="Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=Session;Integrated Security=True;Connect Timeout=30;Encrypt=False;TrustServerCertificate=True;ApplicationIntent=ReadWrite;MultiSubnetFailover=False" name="sessiondb" />
</connectionStrings>
</configuration>
Forse un problema con il tuo progetto di avvio? re [Errore di installazione Enable-Migrations] (http://stackoverflow.com/questions/17308170/enable-migrations-installation-error) – Tone
Ho aggiornato il mio post, per favore controlla. Cosa potrebbe esserci di sbagliato nel progetto di avvio? –
Definite correttamente la stringa di connessione? –