使用Code First 创建数据库

这是一个控制台程序,作用是通过Code First创建数据库.

1.添加EntityFrameWork的引用.

2.添加类 CodeFirstTest1.cs

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

namespace ConsoleApplication1
{
  public   class CodeFirstTest1
    {
        public class Blog
        {
            public int blogID { get; set; }
            public string title { get; set; }
            public string content { get; set; }
            public int columnID { get; set; }
            public virtual Column column { get; set; }
        }
        public class Column
        {
            public int columnID { get; set; }
            public int columnname { get; set; }
            public virtual ICollection<Blog> blogs { get; set; }
        }

        public class BlogContext : DbContext
        {
            public BlogContext()
                : base("CodeFirstTest")
            {
            }
            public DbSet<Blog> blogs { get; set; }
            public DbSet<Column> columns { get; set; }
        }
        public class TestCodeFirst
        {
            public void Test()
            {
                using (var db = new BlogContext())
                {
                    //向数据库添加记录
                    var column = new Column() { columnID = 1, columnname = 1 };
                    db.columns.Add(column);
                    var blog = new Blog()
                    {
                        blogID = 1,
                        title = "abc",
                        content = "test content",
                        columnID = 1
                    };
                    db.blogs.Add(blog);

                    //保存记录，返回受影响的行数
                    int recordsAffected = db.SaveChanges();
                    Console.WriteLine("追加{0}记录成功", recordsAffected);
                }
            }
        }
    }
}

3.在主函数里面调用TestCodeFirst

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            ConsoleApplication1.CodeFirstTest1.TestCodeFirst test = new ConsoleApplication1.CodeFirstTest1.TestCodeFirst();

            test.Test();
        }
    }
}

4.改一下配置文件里面的连接字符串,指定名称.

  <connectionStrings>
    <add name="CodeFirstTest" connectionString="data source=.;initial catalog=CodeFirstTest;integrated security=True;"
 providerName="System.Data.SqlClient"/>
  </connectionStrings>

5.调试

OK,这就生成了名称为CodeFirstTest的数据库了.