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I am running with SQL server express 2008 R2 with a database and SQL authentication. I have added the database connnection to my server explorer and added the connection string to web.config file. When I debug the application it seems to be creating a default Database e.g. tutorial.MVC etc., instead of picking up the database I created prior to creating the app.

Also I am getting the compilation Error: {"Invalid object name 'dbo.Products'."} which should occur because the SQL is:

{SELECT 
[Extent1].[ProductID] AS [ProductID], 
[Extent1].[ProductName] AS [ProductName], 
[Extent1].[ProductPrice] AS [ProductPrice]
FROM [dbo].[Products] AS [Extent1]}

There exists no table called products. This must have been generated by the entity framework database. Which I have deleted because the Products model class was originially Products where as the database table was called Product (human error) so it is failing to update the SQL. Essentially I just want the controller to map to the correct database. I suspect it isn't picking up the database from the connectionString. Although the connection string is being picked up by StoreContext when debugging. Seems not to be picking up the database. But can see why Web.config

<configuration>
  <connectionStrings>
    <add
      name="StoreContext"
      connectionString="Data Source=ADMIN-PC\SQLEXPRESS;Initial Catalog=test;Integrated Security=True;User ID=Login;Password=***********"
      providerName="System.Data.SqlClient"
  />
  </connectionStrings>

global.asax

 public class MvcApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            Database.SetInitializer<Tutorial.Models.StoreContext>(null);
            AreaRegistration.RegisterAllAreas();

            WebApiConfig.Register(GlobalConfiguration.Configuration);
            FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
            RouteConfig.RegisterRoutes(RouteTable.Routes);
        }
    }

Product Controller

 public class ProductController : Controller
    { 

        StoreContext hello = new StoreContext();
        //
        // GET: /Product/
        public ActionResult Index()
        {

            var product = hello.Product.ToList();
            return View(product);

        }

    }

Product Model:

{
    [Table("Product")]
    public class Product
    { 

        public int ProductID { get; set; }
        public string ProductName { get; set; }
        public double ProductPrice { get; set; }
    }
}

StoreContext:

public class StoreContext: DbContext
    {
        public DbSet<Product> Product { get; set; }
    }
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1 回答 1

2

您是否在项目中设置了正确的DatabaseInitializer？

IDatabaseInitializer包含 4 种可以使用的派生类型：CreateDatabaseIfNotExists、DropCreateDatabaseAlways、DropCreateDatabaseIfModelChanges和MigrateDatabaseToLatestVersion

选择适合您需要的初始化程序并从中派生。

接下来，在上下文的构造函数中，设置初始化程序：

public Context() : base("ConnectionString")
{
    Database.SetInitializer(new MigrationsDatabaseInitializer());
}

MigrationsDatabaseInitializer是我从MigrateDatabaseToLatestVersion派生的类。

也许您的项目总是一遍又一遍地重新创建数据库。

您可以使用约定禁用复数。覆盖 OnModelCreation 并删除复数约定：

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
    modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
    base.OnModelCreating(modelBuilder);
}

希望能帮助到你！:)

于 2013-09-12T17:17:39.350 回答