如何在Zedgraph中设置Y轴的范围？

Question

我想设置轴的最大值和最小值。以下代码仅对一个Y轴有效。我想设置3个Y轴。

graphPane1.YAxis.Scale.Min = 0;

graphPane1.YAxis.Scale.Max = 100;

下面是我的代码：

var y1 = graphPane1.AddYAxis("YAxis-1");

var y2 = graphPane1.AddYAxis("YAxis-2");

var y3 = graphPane1.AddYAxis("YAxis-3");

LineItem myCurve1 = graphPane1.AddCurve(txtPlotTitle.Text, first_pointsList, Color.Blue, SymbolType.None);
myCurve.YAxisIndex = y1;

LineItem myCurve2 = graphPane1.AddCurve(txtPlotTitle.Text, second_pointsList, Color.Yellow, SymbolType.None);
myCurve.YAxisIndex = y2;

LineItem myCurve3 = graphPane1.AddCurve(txtPlotTitle.Text, third_pointsList, Color.Green, SymbolType.None);
myCurve.YAxisIndex = y3;

编辑:当我尝试运行这段代码时，程序给出了一个错误。另外，我希望当我不在文本框中写任何东西时，图形是自动缩放的。我尝试了if循环，但它不起作用。

var y1 = graphPane1.AddYAxis("YAxis-1");
var y2 = graphPane1.AddYAxis("YAxis-2");
var y3 = graphPane1.AddYAxis("YAxis-3");

LineItem myCurve1 = graphPane1.AddCurve(txtPlotTitle.Text, first_pointsList, Color.Blue, SymbolType.None);

myCurve.YAxisIndex = y1;         

graphPane1.YAxisList[y1].Scale.Min = double.Parse(textBox1.Text);
graphPane1.YAxisList[y1].Scale.Max = double.Parse(textBox2.Text);

LineItem myCurve2 = graphPane1.AddCurve(txtPlotTitle.Text, second_pointsList, Color.Yellow, SymbolType.None);

myCurve2.YAxisIndex = y2;
graphPane1.YAxisList[y2].Scale.Min = double.Parse(textBox3.Text);
graphPane1.YAxisList[y2].Scale.Max = double.Parse(textBox4.Text);

LineItem myCurve3 = graphPane1.AddCurve(txtPlotTitle.Text, third_pointsList, Color.Green, SymbolType.None);

myCurve3.YAxisIndex = y3;
graphPane1.YAxisList[y3].Scale.Min = double.Parse(textBox5.Text);
graphPane1.YAxisList[y3].Scale.Max = double.Parse(textBox6.Text);

Answer 1

你可以在你的graphPane中遍历它们：

foreach(var axis in graphPane1.YAxisList)
{
  axis.Scale.Min = 0;
  axis.Scale.Max = 100;
}

编辑以在评论中回答OP：

您将索引存储在y1、y2和y3中，以便您可以轻松地单独访问它们：

graphPane1.YAxisList[y2].Scale.Max = 500 // set Max of y2 to 500