public void Chart(string type = "Column")
        {
            new Chart(width: 600, height: 400, theme: ChartTheme.Green)
               .AddTitle("人員(yuan)流動情(qing)況")
               .AddSeries(name: "Employee"
               , chartType: type//Column,Pie
               , xValue: new[] { "一(yi)月份(fen)", "二月份", "三月份", "四(si)月(yue)份(fen)", "五月份", "六(liu)月份", "七月份", "八(ba)月份(fen)", "九月份" }
               , yValues: new[] { "2", "6", "4", "5", "3", "4", "9", "2", "5" })
               .Write();
        }

　　　　 /// <summary>
        /// 通(tong)過數據生成圖表
        /// </summary>
        /// <param name="type"></param>
        public void DataChart(string type)
        {
            var total = productList.Select(i => new
            {
                Name = i.Name,
                Price = i.UnitPrice
            }).ToList();//必須要ToList()操作

            new Chart(width: 600, height: 400, theme: ChartTheme.Green)
               .AddTitle("人員流動情(qing)況")
               .AddSeries(name: "Employee"
               , chartType: string.IsNullOrWhiteSpace(type) ? "Column" : type)//Column,Pie,Range,Stock,Point,Area
               .DataBindTable(total, "Name")
               .Write();
        }