表所有字段為非空 加載ID主鍵 protected void Page_Load(object sender, EventArgs e)??? {??????? HRPaidTimeOffDataContext db = new HRPaidTimeOffDataContext();?????? ENTUserAccount useraccount= db.ENTUserAccount.Single(ua => ua.WindowsAccountName == @"VARALLO1\VaralloMadison"); ?????? ViewState["ENTUserAccountID"] = useraccount.ENTUserAccountID;????????? } ? 執行刪除： ?protected void Button4_Click(object sender, EventArgs e)??? {??????? HRPaidTimeOffDataContext db = new HRPaidTimeOffDataContext();??????? try??????? {??????????? db.SubmitChanges(System.Data.Linq.ConflictMode.ContinueOnConflict);??????? } ??????? catch (System.Data.Linq.ChangeConflictException ex)??????? {??????????? foreach (System.Data.Linq.ObjectChangeConflict occ in db.ChangeConflicts)??????????? {??????????????? occ.Resolve(System.Data.Linq.RefreshMode.OverwriteCurrentValues);??????????? }??????? }??????? ENTUserAccount useraccount = new ENTUserAccount(); ??????? useraccount.ENTUserAccountID = Convert.ToInt32(ViewState["ENTUserAccountID"]);?????? ??????? db.ENTUserAccount.Attach(useraccount);??????? db.ENTUserAccount.DeleteOnSubmit(useraccount);??????? db.SubmitChanges();//此處報錯“找不到行或行已更改” ??? } 沒做更新，是否刪除也要添加時間戳？