c# - 图表控件数据系列

Question

我有一个图表控件。我沿 y 轴绘制价格，沿 x 轴绘制月-年。

我将 series1 1st 和 series2 添加到同一图表区域。然后我使用下面的代码绘制系列 1 和系列 2 的点

curveChart.Series.Add("Series1");
curveChart.Series["Series1"].XValueType = ChartValueType.DateTime;
curveChart.Series["Series1"].Points.DataBind(list1, "MonthYear", "PriceValue", null);
curveChart.Series["Series1"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Line;
curveChart.Series["Series1"].BorderWidth = 3;
curveChart.ChartAreas["0"].AxisX.Interval = 1;

curveChart.Series.Add("Series2");
curveChart.Series["Series2"].XValueType = ChartValueType.DateTime;
curveChart.Series["Series2"].Points.DataBind(list2, "MonthYear", "PriceValue", null);
curveChart.Series["Series2"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Line;
curveChart.Series["Series2"].BorderWidth = 3;
curveChart.ChartAreas["0"].AxisX.Interval = 1;

我面临的问题是 list2 仅包含 2015 年 12 月之前的数据，而 list1 包含 2016 年 12 月之前的数据，但是当绘制图表时，图表中的两条线都延伸到 2016 年 12 月，尽管 list2 直到 12 月才包含数据-2016.我该如何解决？

Answer 1

我试着模拟你的问题。我添加了两个数据系列，一个有 3 分，一个有 2 分。图表正确呈现。这让我觉得您必须在绑定(bind)数据之前对数据进行处理。

curveChart.Series.Clear();
curveChart.Series.Add("Series1");
curveChart.Series["Series1"].XValueType = ChartValueType.DateTime;
curveChart.Series["Series1"].Points.AddXY(DateTime.Now, 12.00m);
curveChart.Series["Series1"].Points.AddXY(DateTime.Now.AddDays(1), 13m);
curveChart.Series["Series1"].Points.AddXY(DateTime.Now.AddDays(2), 8m);
curveChart.Series["Series1"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Line;
curveChart.Series["Series1"].BorderWidth = 3;
curveChart.ChartAreas["0"].AxisX.Interval = 1;

curveChart.Series.Add("Series2");
curveChart.Series["Series2"].XValueType = ChartValueType.DateTime;
curveChart.Series["Series2"].Points.AddXY(DateTime.Now, 5.00m);
curveChart.Series["Series2"].Points.AddXY(DateTime.Now.AddDays(1), 7m);          
curveChart.Series["Series2"].ChartType = System.Windows.Forms.DataVisualization.Charting.SeriesChartType.Line;
curveChart.Series["Series2"].BorderWidth = 3;
curveChart.ChartAreas["0"].AxisX.Interval = 1;