public GeneralizeModel() { this.NameItem = new List <string>(); this.ColorItem = new List <string>(); this.TimeItem = new List <string>(); this.GeneralizeData = new List <GeneralizeData>(); this.TimeParse = new List <DateTime>(); TimeItem.Add($"{DateTime.Now.AddDays(-27).ToString("MM月dd日")} - {DateTime.Now.AddDays(-21).ToString("MM月dd日")}"); TimeItem.Add($"{DateTime.Now.AddDays(-20).ToString("MM月dd日")} - {DateTime.Now.AddDays(-14).ToString("MM月dd日")}"); TimeItem.Add($"{DateTime.Now.AddDays(-13).ToString("MM月dd日")} - {DateTime.Now.AddDays(-7).ToString("MM月dd日")}"); TimeItem.Add($"{DateTime.Now.AddDays(-6).ToString("MM月dd日")} - {DateTime.Now.ToString("MM月dd日")}"); var date = new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day); TimeParse.Add(date.AddDays(-27)); TimeParse.Add(date.AddDays(-20)); TimeParse.Add(date.AddDays(-13)); TimeParse.Add(date.AddDays(-6)); }