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  • C#Linq To Entry

    public void updateUser(Server.Data.User User, out string resMsg)
            {           
                try
                {               
                    var tempF = db.User.First(f => f.Id == User.Id);
                    var tempFT = db.UserType.First(ft => ft.Id == User.UserTypeId);
                    if (tempF!=null)
                    {
                        if (tempFT != null)
                        {
                            tempF.CreatorId = User.CreatorId;
                            tempF.UserName = User.UserName;
                            tempF.UserSize = User.UserSize;
                            tempF.UserType = tempFT;
                            tempF.LatestVersion = User.LatestVersion;
                            tempF.ModifierId = User.ModifierId;
                            tempF.ModifyDate = DateTime.Now.ToString();
                            db.SaveChanges();
                            resMsg = "Update User success";
                        }
                        else
                        {
                            resMsg = "Update User failure:UserType not found";
                        }
                    }
                    else
                    {
                        resMsg = "Update User failure:User not found";
                    }
                }
                catch (Exception ex)
                {
                    resMsg = "Update User failure\n" + ex.ToString();
                }
            }
    注意外键约束,如果主键ID为自增长,注意将表的 IDentity 设为 on
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  • 原文地址:https://www.cnblogs.com/lipf/p/2357096.html
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