C# Windows 窗体图表在 YAxis 中始终显示为零

Question

I draw some charts using DataVisualization.Charting.Chart . All of my charts have inverse Y range.

For Example "-20 to 20" or "-150 to 150". It means that Zero is always in the middle of Y range, there is no problem in drawing but the chart never makes a label for Zero.

For Example I have this labels -20,-15,-10,-5,5,10,15,20 . I always want to see the Zero in Y axis labels. See the image:

Answer 1

I did it using CustomLabels :

 int maxRange = 20;
 int yInterval = 5;
 var minRange = (maxRange * -1);
 area.AxisY.Minimum = minRange;
 area.AxisY.Maximum = maxRange;
 area.AxisY.LabelStyle.Format = "#";
 area.AxisY.Interval = yInterval;
 int yVal = minRange;
 while (yVal <= maxRange)
 {
    area.AxisY.CustomLabels.Add(yVal - 0.5, yVal + 0.5, yVal.ToString());
    yVal += yInterval;
 }

Answer 2

for this min & max must in 10s series

chart.ChartAreas[0].AxisX.Interval = 10;
chart.ChartAreas[0].AxisY.Interval = 10;