Question

我是编程的初学者，现在我正尝试在ASP.Net中构建Web应用程序。我正确的问题是如何首先使用代码创建DBContext。这是我的模特：

public class Messages {
        public int MessageID { get; set; }
        [Required]
        [StringLength(300, MinimumLength = 3)]
        public string MessageContent { get; set; }
        public virtual ApplicationUser Sender { get; set; }
        public virtual ApplicationUser Receiver { get; set; }
    }


    public class FriendRequest {
        public int RequestId { get; set; }
        public virtual ApplicationUser RequestFrom { get; set; }
        public virtual ApplicationUser RequestTo { get; set; }
        public bool Confirmed { get; set; }
    }


public class DejtingsidaDbContext : DbContext {

        public DejtingsidaDbContext() : base() { }

        public virtual DbSet<Messages> Messages { get; set; }
        public virtual DbSet<FriendRequest> Requests { get; set; }
    }

这是HomeController：

    public class HomeController : Controller {

        DejtingsidaDbContext db = new DejtingsidaDbContext();

        public ActionResult Index() {
            return View();
        }

        public ActionResult About() {
            ViewBag.Message = "Your application description page.";

            return View();
        }

        public ActionResult Contact() {
            ViewBag.Message = "Your contact page.";

            return View();

        }
    }

我试图在Web.config中创建一个连接字符串，但是当我第一次运行该程序时，然后当我检查是否已创建数据库时，尚未创建它。请帮助新手！

Answer 1

在web.cofig文件中传递连接字符串，如下所示。

<connectionStrings>  
<add name="yourconnectinstringName" 
connectionString="
Data Source= DatabaseServerName(example:uzainPC);
Integrated Security=true;
Initial Catalog=YourDatabaseName(example:SchoolSystem); 
uid=YourUserName; 
Password=yourpassword; " 
providerName="System.Data.SqlClient" 
/>   
</connectionStrings>

而不是从下面显示的这些行中删除虚拟的。

public class DejtingsidaDbContext : DbContext {
public DejtingsidaDbContext() : base() { }

public DbSet<Messages> Messages { get; set; }
public DbSet<FriendRequest> Requests { get; set; }
}

如何首先使用代码创建dbcontext？

1 个答案: