C# (CSharp) Giorgos_Rouselatos_Assignment_2.Managers TrainerDb.SaveChanges示例

示例#1

 public void AddTrainer(Trainer trainer)
 {
     using (TrainerDb db = new TrainerDb())
     {
         db.Trainers.Add(trainer);
         db.SaveChanges();
     }
 }

示例#2

 public void DeleteTrainer(int id)
 {
     using (TrainerDb db = new TrainerDb())
     {
         Trainer trainer = db.Trainers.Find(id);
         db.Trainers.Remove(trainer);
         db.SaveChanges();
     }
 }

示例#3

 public void UpdateTrainer(Trainer trainer)
 {
     using (TrainerDb db = new TrainerDb())
     {
         db.Trainers.Attach(trainer);
         db.Entry(trainer).State = EntityState.Modified;
         db.SaveChanges();
     }
 }