EF基本操作增、删、查、改、分页，join……等

一、批量添加数据

  1         static void Main(string[] args)
  2         {
  3             add();
  4             add2();
  5             Console.ReadKey();
  6         }
  7 
  8         static void add()
  9         {
 10             DemoDbEntities db = new DemoDbEntities();
 11             Stopwatch st = new Stopwatch();
 12             st.Start();
 13             for (int i = 0; i < 1000; i++)
 14             {
 15                 db.User.Add(new User { NAME = "张三" +i, AGE = i });
 16                 db.SaveChanges();
 17             }
 18             st.Stop();
 19             Console.WriteLine("用时：{0}毫秒", st.ElapsedMilliseconds);
 20 
 21 
 22         }
 23 
 24         static void add2()
 25         {
 26             DemoDbEntities db = new DemoDbEntities();
 27             Stopwatch st = new Stopwatch();
 28             st.Start();
 29             for (int i = 0; i < 1000; i++)
 30             {
 31                 db.User.Add(new User { NAME = "张三" + i,AGE=i });
 32 
 33             }
 34             db.SaveChanges();
 35             st.Stop();
 36             Console.WriteLine("用时：{0}毫秒", st.ElapsedMilliseconds);
 37 
 38         }

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