c# 疑难杂点总计

 #region 检测Excel导入的日期列,防止转换出错 不确定传进来的是duble还是datime
                    DateTime taskplanStartDate;
                    DateTime taskplanEndDate;
                    double typeValue;

                    if (double.TryParse(planStartDate, out typeValue))
                    {
                        taskplanStartDate = DateTime.FromOADate(Convert.ToDouble(planStartDate));
                    }
                    else
                    {
                        taskplanStartDate = Convert.ToDateTime(planStartDate);
                    }

                    if (double.TryParse(planEndDate, out typeValue))
                    {
                        taskplanEndDate = DateTime.FromOADate(Convert.ToDouble(planEndDate));
                    }
                    else
                    {
                        taskplanEndDate = Convert.ToDateTime(planEndDate);
                    }
#endregion