string t1 = "0850", t2="1011";
(1) 轉換為數值比較
bool IsT1Big = int.parse(t1) > int.parse(t2);
(2) 轉換為時間值比較
t1 = t1.SubString(0,2) + ":" + t1.SubString(2,2);
t2 = t2.SubString(0,2) + ":" + t2.SubString(2,2);
bool IsT1Big = DateTime.Parse(t1) > DateTime.Parse(t2)