public void tronDapAn(CauHoi c)
{
int indexDA = 0;
switch (c.DapAn)
{
case "A":
indexDA = 0;
break;
case "B":
indexDA = 1;
break;
case "C":
indexDA = 2;
break;
case "D":
indexDA = 3;
break;
}
List <int> randLuaChon = new List <int>();
RandomNumber(randLuaChon);
string[] chTam = new string[4];
chTam[0] = c.A;
chTam[1] = c.B;
chTam[2] = c.C;
chTam[3] = c.D;
c.A = chTam[randLuaChon[0]];
c.B = chTam[randLuaChon[1]];
c.C = chTam[randLuaChon[2]];
c.D = chTam[randLuaChon[3]];
switch (randLuaChon.IndexOf(indexDA))
{
case 0:
c.DapAn = "A";
break;
case 1:
c.DapAn = "B";
break;
case 2:
c.DapAn = "C";
break;
case 3:
c.DapAn = "D";
break;
}
randLuaChon.Clear();
}
public CauHoi LayCauHoiTuBDS(int vitri)
{
CauHoi c = new CauHoi();
c.IDCauHoi = ((DataRowView)bdsDethi[vitri])["CAUHOI"].ToString().Trim();
c.MaMH = ((DataRowView)bdsDethi[vitri])["MAMH"].ToString().Trim();
c.MaGV = ((DataRowView)bdsDethi[vitri])["MAGV"].ToString().Trim();
c.TrinhDo = ((DataRowView)bdsDethi[vitri])["TRINHDO"].ToString().Trim();
c.NoiDUng = ((DataRowView)bdsDethi[vitri])["NOIDUNG"].ToString().Trim();
c.A = ((DataRowView)bdsDethi[vitri])["A"].ToString().Trim();
c.B = ((DataRowView)bdsDethi[vitri])["B"].ToString().Trim();
c.C = ((DataRowView)bdsDethi[vitri])["C"].ToString().Trim();
c.D = ((DataRowView)bdsDethi[vitri])["D"].ToString().Trim();
c.DapAn = ((DataRowView)bdsDethi[vitri])["DAP_AN"].ToString().Trim();
c.DaChon = "X";
tronDapAn(c);
return(c);
}