JS截取小數點

string temp = NetPerGainArr[i].ToString();

float d = float.Parse(temp.Substring(temp.LastIndexOf(',') + 1, 2));

    double temp = Convert.ToDouble(dt.Rows[i]["CockFeedAmount"]) * 100;

                double d = Math.Floor(temp) / 100;

二：先将double類型的數乘以100在取整數除以100就是兩位小數