Question

为什么我的代码不起作用？当我尝试运行控制台应用程序时，它总是停在db.Blogs.Add(blog)上，永远不会继续。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data.Entity;

namespace CodeFirstNewDatabaseSample
{
class Program
{
    static void Main(string[] args)
    {
        using(var db = new BloggingContext())
        {
            Console.Write("Enter the name of new Blog:");
            var name = Console.ReadLine();

            var blog = new Blog { Name = name };
            db.Blogs.Add(blog); //Stop working here but no error.
            db.SaveChanges();

            var query = from b in db.Blogs
                        orderby b.Name
                        select b;

            Console.WriteLine("All blogs in the database:");
            foreach (var item in query)
            {
                Console.Write(item.Name);
            }

            Console.WriteLine("Press any key to exit...");
            Console.ReadLine();
        }
    }
}

public class Blog
{
    public int BlogId { get; set; }
    public string Name { get; set; }

    public virtual List<Post> Post { get; set; }
}

public class Post
{
    public int PostId { get; set; }
    public string Title { get; set; }
    public string Content { get; set; }

    public int BlogId { get; set; }
    public virtual Blog Blog { get; set; }
}

public class BloggingContext : DbContext
{
    public BloggingContext()
        : base("Data Source=(localdb)\v11.0;Initial Catalog=CodeFirstNewDatabaseSample.BloggingContext;Integrated Security=True")
    {
    }
    public DbSet<Blog> Blogs { get; set; }
    public DbSet<Post> Posts { get; set; }
}
}

当我输入ASP.NET Blog并按下输入时，没有任何反应。它应该创建一个包含2个名为Blog和Post的表的新数据库并显示消息（All blogs in the database: ASP.NET Blog）

抱歉英文不好，请帮忙

Answer 1

您的代码清晰明了，但您必须将连接字符串更改为以下格式

public class BloggingContext : DbContext
{
    public BloggingContext()
        : base(@"Data Source=(localdb)\v11.0;Initial Catalog=CodeFirstNewDatabaseSample.BloggingContext;Integrated Security=True")
    {
    }
    public DbSet<Blog> Blogs { get; set; }
    public DbSet<Post> Posts { get; set; }
}

你错过了＆＃34; @＆＃34;在连接字符串的开头签名以避免转义字符。

实体框架代码首先没有错误但没有工作

1 个答案: