Question

我想知道是否可以在现有图表上的特定点（x，y）添加彩色三角形（向上或向下），以便在滚动/缩放图表时更新它们的位置。

我有一个谷歌，但没有偶然发现任何似乎符合这些要求的东西。

任何指针都会受到赞赏。

Answer 1

如MS Chart Samples中所述，您可以使用注释

private void AddLineAnnotation()
{
 LineAnnotation annotation = new LineAnnotation();
 annotation.AnchorDataPoint = Chart1.Series[0].Points[2];
 annotation.Height = -25;
 annotation.Width = -25;
 annotation.LineWidth = 2;
 annotation.StartCap = LineAnchorCapStyle.Arrow;
 annotation.EndCap = LineAnchorCapStyle.Arrow;
 Chart1.Annotations.Add(annotation);
}

您甚至可以将自定义多边形定义为注释

private void AddPolygonAnnotation()
{
 PolygonAnnotation annotation = new PolygonAnnotation();
 annotation.AnchorDataPoint = Chart1.Series[0].Points[2];

 // explicitly set the relative height and width
 annotation.Height = 50;
 annotation.Width = 30;

 annotation.BackColor = Color.FromArgb(128, Color.Orange);
 annotation.LineColor = Color.Black;
 annotation.LineDashStyle = ChartDashStyle.Solid;

 // define relative value points for a polygon
 PointF [] points = new PointF[5];
 points[0].X = 0;
 points[0].Y = 0;                
 points[1].X = 100;
 points[1].Y = 0;       
 points[2].X = 100;
 points[2].Y = 100;        
 points[3].X = 0;
 points[3].Y = 100;       
 points[4].X = 50;
 points[4].Y = 50;

 annotation.Path.AddPolygon(points);      
 Chart1.Annotations.Add(annotation);
}

Answer 2

绘制带标记的点图。创建自己的图像并使用MarkerImage属性加载自定义图像

答案解释如何获得倒三角形 Custom MarkerStyles possible in Microsoft Chart Controls?

MS Chart，在特定点向现有图表添加三角形

2 个答案: