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  • EF增删改查操作

    using (StudentEntities ent = new StudentEntities())
                        {
                            User aNewUser = new User()
                            {
                                Age = 20,
                                Name = strName,
                                Sex = strSex
                            };
                            ent.User.Add(aNewUser);
                            if (ent.SaveChanges() > 0)
                            {
                                Response.Write("添加成功。");
                            }
                            else
                            {
                                Response.Write("添加失败。");
                            }
                            Response.End();
                        }

     using (StudentEntities ent = new StudentEntities())
                        {
                            User aUser = (from c in ent.User where c.ID == iID select c).FirstOrDefault();
                            if (aUser != null)
                            {
    
                                ent.User.Remove(aUser);
                                if (ent.SaveChanges() > 0)
                                {
                                    Response.Write("删除成功。");
                                }
                                else
                                {
                                    Response.Write("删除失败。");
                                }
                            }
                            else
                            {
                                Response.Write("不存在此用户,请确认用户ID是否正确。");
                            }
                            Response.End();
                        }

    改查

    using (StudentEntities ent = new StudentEntities())
                {
                    User aUser = (from c in ent.User where c.ID == iID select c).FirstOrDefault();
                    if (aUser != null)
                    {
                        aUser.Name = strName;
                        aUser.Age = 20;
                        aUser.Sex = strSex;
                        if (ent.SaveChanges() > 0)
                        {
                            Response.Write("<script>alert('修改成功。')</script>");
                        }
                    }
                }
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  • 原文地址:https://www.cnblogs.com/shy1766IT/p/5372453.html
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