VS2010图表控件，如何显示空白图表？ [英] VS2010 Chart control, how to display a blank chart?

问题描述

我试图在窗体上使用图表控件并使其工作，绘制一些实时数据，然而在数据到达之前，不显示任何内容。我想显示一个XY的10 30的空图，但仍然有图的自动范围，如果值超过这个。

我找不到一个属性来显示

解决方案

您可以通过使其线条颜色为透明来隐藏系列的所有数据。如果你还设置它的LegendText为，所有你可以看到的是轴刻度。您可以通过添加几个点并设置最小值和最大值来控制它们：

  //我们的虚拟对象的简短引用： 
系列S0 = chart1.Series [0]; 
 //简单类型
 S0.ChartType = SeriesChartType.Line; 
 //设置10点，其中x值从0-100并且y值从1-10开始：
 for（int i = 0; i <100; i + = 10）S0 .Points.AddXY（i，i / 10）; 
 //或只添加一些，例如第一点和最后一点：$ b​​ $ b //S0.Points.AddXY(100，10）; 
 //S0.Points.AddXY（0，10）; 
 //隐藏行：
 S0.Color = Color.Transparent; 
 //隐藏图例文本（它仍然占用一些空间）
 S0.LegendText =; 
 //将轴限制为目标值
 chart1.ChartAreas [0] .AxisX.Maximum = 100; 
 chart1.ChartAreas [0] .AxisX.Minimum = 0; 
  

结果看起来像一个空图表：

I'm trying to use the chart control on a windows form and have it working, plotting some real time data, however before the data arrives nothing is displayed. I would like to show an empty graph with an X Y of 10 30 but still have the graph auto range if values go above this.

I cannot find a property to show the "blank" graph it this possible and if so how?

thanks

解决方案

You can hide all data of a Series by making its line color Transparent. If you also set its LegendText to be " " all you can see are the Axis ticks. you can control them by adding a few Points and by setting the Minimum and Maximum values:

// short reference for our dummy:
Series S0 = chart1.Series[0];
// a simple type
S0.ChartType = SeriesChartType.Line;
// set 10 point with x-values going from 0-100 and y-values going from 1-10:
for (int i = 0; i < 100; i +=10)  S0.Points.AddXY(i , i / 10);
// or add only a few, e.g. the first and last points:
//S0.Points.AddXY(100, 10);
//S0.Points.AddXY(0, 10);
// hide the line:
S0.Color = Color.Transparent;
// hide the legend text (it will still take up a little space, though)
S0.LegendText = " ";
// limit the axis to the target values
chart1.ChartAreas[0].AxisX.Maximum = 100;
chart1.ChartAreas[0].AxisX.Minimum = 0;

The result looks like an empty chart:

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