public bool themCauHoi(string noiDungCH, int doKho, List <DapAn> lstDA)
{
CauHoi ch = new CauHoi();
DapAn da;
ch.NoiDungCH = noiDungCH;
ch.DoKho = doKho;
ch.HinhThucCH = null;
try
{
tnth.CauHois.InsertOnSubmit(ch);
tnth.SubmitChanges();
for (int i = 0; i < lstDA.Count; i++)
{
da = new DapAn();
da.MaCH = ch.MaCH;
da.NoiDungDA = lstDA[i].NoiDungDA;
da.DungSai = lstDA[i].DungSai;
tnth.DapAns.InsertOnSubmit(da);
}
tnth.SubmitChanges();
return(true);
}
catch { return(false); }
}
partial void DeleteDapAn(DapAn instance);
partial void UpdateDapAn(DapAn instance);
partial void InsertDapAn(DapAn instance);
private void detach_DapAns(DapAn entity)
{
this.SendPropertyChanging();
entity.CauHoi = null;
}
private void attach_DapAns(DapAn entity)
{
this.SendPropertyChanging();
entity.CauHoi = this;
}
public DapAn getDapAnDung(int mach)
{
DapAn dapans = tnth.DapAns.Where(t => t.MaCH == mach && t.DungSai == true).FirstOrDefault();
return(dapans);
}