图表，共享X轴在不同系列之间 [英] Chart, share X axis between different series

问题描述

我有一个4系列的图表。每个系列在不同的时间添加，取决于打开/关闭的应用程序功能。所有系列都在x轴上：

  DateTime.Now.ToString（mm：ss）
  

所以我认为在任何时候系列数据都可用，它们将被添加到当时发生在x上的图表轴。看起来不像那样。此图表显示蓝色线和红色线。蓝线开始，然后几秒钟后，我检查了checkBox2激活红线，这恰好发生在27:38（在那里你可以看到一个小滴蓝线上）。我不明白为什么红线起始于图表的最左边，而不是在被触发的时候（27:38）。

这是我的代码：

  string reqTemp = textBox9.Text; 
 textBox2.Text = avTemp.ToString（F）; 
 this.chart1.Series [Actual Temperature]。Points.AddXY（DateTime.Now.ToString（mm：ss），avTemp）; 
 if（checkBox2.Checked == true）
 {
 this.chart1.Series [Requested Temperature]。Points.AddXY（DateTime.Now.ToString（mm：ss） ，reqTemp）; 
} 
  

如何在第一个已经开始运行之后添加系列上？基本上所有系列共享同一个x轴。

解决方案

所有系列都在x轴上： / p>

  DateTime.Now.ToString（mm：ss）
  

我读为：所有的X值都添加为格式化的字符串;这通常是一件坏事，因为这样做 X值已变为 0s ，读为：无意义。

如果要保留 DateTime 值，您需要添加 DataPoints 因此您应该将它们添加为 AddXY（yourDateTimeXValue，yourYValue）; 并设置 code>格式为

  chart1.ChartAreas [0] .AxisX.LabelStyle.Format =mm：ss; 
  

I have a chart with 4 series. Each series is added at different times, depending on what is switched on/off of the app features. All series have on the x axis:

DateTime.Now.ToString("mm:ss")

so I thought that at any time the series data are available, they will be added to the chart at that time that happens on x axis. Looks like is not like that. This chart shows a blue line and a red line. The blue line started first then after few seconds I checked checkBox2 which activate the red line, that happened exactly at 27:38 (where you can see a small drop on the blue line). I do not understand why the red line starts at the far left of the chart and not at the time that was triggered (27:38).

This is my code:

        string reqTemp = textBox9.Text;
        textBox2.Text = avTemp.ToString("F");
        this.chart1.Series["Actual Temperature"].Points.AddXY(DateTime.Now.ToString("mm:ss"), avTemp);
        if (checkBox2.Checked == true)
        {
            this.chart1.Series["Requested Temperature"].Points.AddXY(DateTime.Now.ToString("mm:ss"), reqTemp);
        }   

How can I have the series added after the first one was already running starting at the time they are switched on? Basically all series sharing the same x axis.

解决方案

All series have on the x axis:

DateTime.Now.ToString("mm:ss")

I read this as: All your X-Values are added as formatted strings; this is usually a bad thing, as by doing so the X-Values have become all 0s, read: meaningless.

If you want to preserve the DateTime values you need to add the DataPoints with valid X-Values!

So you should add them as AddXY(yourDateTimeXValue, yourYValue); and set the Format as

  chart1.ChartAreas[0].AxisX.LabelStyle.Format = "mm:ss";

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