double x = (double)new XDate(Convert.ToInt32(sDate.Substring(0, 4)), Convert.ToInt32(sDate.Substring(5, 2)), Convert.ToInt32(sDate.Substring(8, 2)));
//x轴设置为日期格式myPane.XAxis.Type = AxisType.Date;myPane.XAxis.Scale.Format = "M-d";