赢得表格图表 [英] Win Form Charting

问题描述

我可能问错了问题，但我需要的是在我的 Windows 窗体图表中添加一个指导线".换句话说，我有一个包含简单数据系列的图表，我需要在通过分数或 80% 的 y 轴上画一条线.我不想添加第二个系列，因为第一个系列的数据点数量不确定.有没有一种简单的方法可以在 y 轴上简单地画一条线?下面的虚线是我要拍摄的(不需要箭头).

I may be asking the wrong question, but what I need is to add a "Guide Line" to my windows form chart. In other words I have a chart with a simple data series and I need to draw a line on the y axis at the passing score, or 80%. I don't want to add a second series as the first series has an undetermined number of data points. Is there a simple way to simply draw one line on the y axis? The dashed line below is what I am shooting for(it does not need the arrows).

100|
   |
 90|
   |                     o
 80|<----------------------->
   |
 70|      o                  o
   |
 60|         o
   |   o        o
 50|o              o
   |_________________________
    1  2  3  4  5  6  7  8  9

推荐答案

您可以添加StripLine.

使用StripWidth 设置行位置的属性:

Use StripWidth property to set line position:

var series = chart1.Series[0]; //series object
var chartArea = chart1.ChartAreas[series.ChartArea];
chartArea.AxisY.StripLines.Add(new StripLine
                                           {
                                               BorderDashStyle = ChartDashStyle.Dash,
                                               BorderColor = Color.DarkBlue,
                                               StripWidth = 80//Here is your y value
                                           });

更新:此答案的先前版本使用了 Interval 而不是 StripWidth.正如@dthor 在评论中正确指出设置Interval 将绘制一条重复的带状线.在上面的例子中，Interval 默认设置为 0.

UPDATE: Previous version of this answer used Interval instead of StripWidth. As @dthor correctly pointed out in the comments setting the Interval will draw a repeated strip line. In the example above, Interval is set to 0 by default.

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