[英]Code First database generation external dll
我嘗試首先使用代碼來生成數據庫,並在每次運行應用程序時將其種子化,但是出現以下錯誤:
無法將文件“ C:{filepath} \\ Application \\ App_Data \\ mydatabase.mdf”附加為數據庫“ mydatabase”。
我試圖做一個'update-database'(根據其他問題的建議),但是沒有生成.mdf文件。
這是使用的連接字符串:
數據源=(LocalDb)\\ v11.0; AttachDbFilename = | DataDirectory | \\ mydatabase.mdf;初始目錄= mydatabase;集成安全性= True
作為一些背景信息,我有兩個不同的項目,它們位於不同的解決方案中 :
“應用程序”項目引用了“域”項目
在域項目中,我創建了代碼優先模型和dbContext:
public class ApplicationContext : IdentityDbContext<User, IntRole, int, IntUserLogin, IntUserRole, IntUserClaim>
{
public ApplicationContext()
: base(nameOrConnectionString: "constr") { }
public ApplicationContext(string connectionString)
: base(nameOrConnectionString: connectionString) { }
static ApplicationContext()
{
Database.SetInitializer<ApplicationContext>(null);
}
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
// Use singular table names
base.OnModelCreating(modelBuilder);
modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
modelBuilder.Configurations.AddFromAssembly(Assembly.GetExecutingAssembly());
Configuration.ProxyCreationEnabled = false;
Configuration.LazyLoadingEnabled = false;
Configuration.ValidateOnSaveEnabled = false;
}
public DbSet<Item> Items { get; set; }
}
public class ApplicationContextInitializer : DropCreateDatabaseAlways<ApplicationContext>
{
protected override void Seed(ApplicationContext context)
{
new List<Item>
{
new Item("test")
{
},
new Item("test2")
{
},
new Item("test3")
{
}
}.ForEach(t => context.Items.Add(t));
base.Seed(context);
}
}
在我的global.asax應用程序項目中,我具有以下內容:
Database.SetInitializer(new ApplicationContextInitializer());
然后,我嘗試將數據添加到數據庫:
mUnitOfWork = new UnitOfWork(new RepositoryProvider(new RepositoryFactories()));
mUnitOfWork.ItemRepository.Add(new Item("my item"));
mUnitOfWork.Save();
原來,您需要將上下文添加到web.config中,如下所示:
<configuration>
<entityFramework>
<contexts>
<context type="Application.Data.ApplicationContext, Application.Data">
<databaseInitializer type="Application.Data.ApplicationContextInitializer, Application.Data" />
</context>
</contexts>
</entityFramework>
</configuration>
有用的鏈接(如果有人遇到類似問題): http : //www.asp.net/mvc/tutorials/getting-started-with-ef-using-mvc/creating-an-entity-framework-data-model-for-一個asp-net-mvc應用程序
要擴展正確答案,您還可以通過代碼添加此答案:
public class DBConfig
{
public static readonly DBInitializer Initalizer = new DBInitializer();
public static void InitalizeDB()
{
System.Data.Entity.Database.SetInitializer<DMPDataContext>(Initalizer);
}
}
protected void Application_Start()
{
//common application startups
DBConfig.InitalizeDB();
//...
}
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