有没有办法为一张图表创建2个Y轴。
似乎不可能在同一图表上添加2个以上的轴。
任何线索?。
非常感谢。
答案 0 :(得分:1)
您应该从microsoft下载mschart samples ...并查看
图表功能 - >轴 - >多个Y轴
这里是从中提取的代码
using System.Windows.Forms.DataVisualization.Charting;
...
if(checkBoxUseMultipleYAxis.Checked)
{
// Set custom chart area position
Chart1.ChartAreas["Default"].Position = new ElementPosition(25,10,68,85);
Chart1.ChartAreas["Default"].InnerPlotPosition = new ElementPosition(10,0,90,90);
// Create extra Y axis for second and third series
CreateYAxis(Chart1, Chart1.ChartAreas["Default"], Chart1.Series["Series2"], 13, 8);
CreateYAxis(Chart1, Chart1.ChartAreas["Default"], Chart1.Series["Series3"], 22, 8);
}
else
{
// Set default chart areas
Chart1.Series["Series2"].ChartArea = "Default";
Chart1.Series["Series3"].ChartArea = "Default";
// Remove newly created series and chart areas
while(Chart1.Series.Count > 3)
{
Chart1.Series.RemoveAt(3);
}
while(Chart1.ChartAreas.Count > 1)
{
Chart1.ChartAreas.RemoveAt(1);
}
// Set default chart area position to Auto
Chart1.ChartAreas["Default"].Position.Auto = true;
Chart1.ChartAreas["Default"].InnerPlotPosition.Auto = true;
}
...
/// <summary>
/// Creates Y axis for the specified series.
/// </summary>
/// <param name="chart">Chart control.</param>
/// <param name="area">Original chart area.</param>
/// <param name="series">Series.</param>
/// <param name="axisOffset">New Y axis offset in relative coordinates.</param>
/// <param name="labelsSize">Extra space for new Y axis labels in relative coordinates.</param>
public void CreateYAxis(Chart chart, ChartArea area, Series series, float axisOffset, float labelsSize)
{
// Create new chart area for original series
ChartArea areaSeries = chart.ChartAreas.Add("ChartArea_" + series.Name);
areaSeries.BackColor = Color.Transparent;
areaSeries.BorderColor = Color.Transparent;
areaSeries.Position.FromRectangleF(area.Position.ToRectangleF());
areaSeries.InnerPlotPosition.FromRectangleF(area.InnerPlotPosition.ToRectangleF());
areaSeries.AxisX.MajorGrid.Enabled = false;
areaSeries.AxisX.MajorTickMark.Enabled = false;
areaSeries.AxisX.LabelStyle.Enabled = false;
areaSeries.AxisY.MajorGrid.Enabled = false;
areaSeries.AxisY.MajorTickMark.Enabled = false;
areaSeries.AxisY.LabelStyle.Enabled = false;
areaSeries.AxisY.IsStartedFromZero = area.AxisY.IsStartedFromZero;
series.ChartArea = areaSeries.Name;
// Create new chart area for axis
ChartArea areaAxis = chart.ChartAreas.Add("AxisY_" + series.ChartArea);
areaAxis.BackColor = Color.Transparent;
areaAxis.BorderColor = Color.Transparent;
areaAxis.Position.FromRectangleF(chart.ChartAreas[series.ChartArea].Position.ToRectangleF());
areaAxis.InnerPlotPosition.FromRectangleF(chart.ChartAreas[series.ChartArea].InnerPlotPosition.ToRectangleF());
// Create a copy of specified series
Series seriesCopy = chart.Series.Add(series.Name + "_Copy");
seriesCopy.ChartType = series.ChartType;
foreach(DataPoint point in series.Points)
{
seriesCopy.Points.AddXY(point.XValue, point.YValues[0]);
}
// Hide copied series
seriesCopy.IsVisibleInLegend = false;
seriesCopy.Color = Color.Transparent;
seriesCopy.BorderColor = Color.Transparent;
seriesCopy.ChartArea = areaAxis.Name;
// Disable grid lines & tickmarks
areaAxis.AxisX.LineWidth = 0;
areaAxis.AxisX.MajorGrid.Enabled = false;
areaAxis.AxisX.MajorTickMark.Enabled = false;
areaAxis.AxisX.LabelStyle.Enabled = false;
areaAxis.AxisY.MajorGrid.Enabled = false;
areaAxis.AxisY.IsStartedFromZero = area.AxisY.IsStartedFromZero;
// Adjust area position
areaAxis.Position.X -= axisOffset;
areaAxis.InnerPlotPosition.X += labelsSize;
}
...