C＃圖表Y軸網格和標簽滾動
[英]C# Chart Y axis grid and label scrolling
問題描述
我在MS C＃圖表顯示和Y軸滾動方面苦苦掙扎。 我想做的是，當我滑動Y軸滾動條時，主要網格也滑動了。 但是主網格是固定的，標簽會更改。 Y軸是“數字樣式”。 X軸是“日期時間樣式”。 當我滾動X軸時，日期也會滾動。 這是很好的同步。 但這不是Y軸的情況。 我嘗試修改YAxis.LabelStyle和YAxis.MajorGrid失敗。
以下是此問題的源代碼。
// Create new Graph
chart = new Graph.Chart();
// Définition de la taille et du modèle de chart
chart.Location = new System.Drawing.Point(10, 10);
chart.Size = new System.Drawing.Size(700, 700);
chart.BackGradientStyle = Graph.GradientStyle.LeftRight;
chart.BorderSkin.SkinStyle = Graph.BorderSkinStyle.Emboss;
// Add a chartarea called "draw", add axes to it and color the area black
chart.ChartAreas.Add("draw");
// Définition axe X (secondes). Largeur 200s, interval = 10s, label toutes les 30s
chart.ChartAreas["draw"].AxisX.IntervalType = Graph.DateTimeIntervalType.Seconds;
chart.ChartAreas["draw"].AxisX.Interval = 10; // Ajoute une trait à chaque interval de 10s sur l'axe (attention, c'est différent de la grille !!!)
chart.ChartAreas["draw"].AxisX.Title = "Temps";
chart.ChartAreas["draw"].AxisX.IntervalOffsetType = Graph.DateTimeIntervalType.Seconds;
chart.ChartAreas["draw"].AxisX.LabelStyle.IntervalType = Graph.DateTimeIntervalType.Seconds;
chart.ChartAreas["draw"].AxisX.LabelStyle.IntervalOffsetType = Graph.DateTimeIntervalType.Seconds;
chart.ChartAreas["draw"].AxisX.LabelStyle.Interval = 30; // Ajoute un label toutes les 30s
chart.ChartAreas["draw"].AxisX.LabelStyle.IntervalOffset = 0D;
chart.ChartAreas["draw"].AxisX.LabelStyle.Format = "H:mm:ss";
chart.ChartAreas["draw"].AxisX.Minimum = 0; // En nombre de jour ! (pourquoi, je sais pas)
chart.ChartAreas["draw"].AxisX.Maximum = 200.0/(24.0*60*60.0); // En nombre de jour ! Donc 200s => 200s / (24h*60m*60s)
// Définition grille axe X . Interval tous les 10s, lignes tirets blancs
chart.ChartAreas["draw"].AxisX.MajorGrid.Interval = 10; // 10s entre chaque graduation (grille traversant l'axe X verticalement)
chart.ChartAreas["draw"].AxisX.MajorGrid.IntervalType = Graph.DateTimeIntervalType.Seconds;
chart.ChartAreas["draw"].AxisX.MajorGrid.IntervalOffset = 0D;
chart.ChartAreas["draw"].AxisX.MajorGrid.IntervalOffsetType = Graph.DateTimeIntervalType.Seconds;
chart.ChartAreas["draw"].AxisX.MajorGrid.LineColor = Color.White;
chart.ChartAreas["draw"].AxisX.MajorGrid.LineDashStyle = Graph.ChartDashStyle.Dash;
// Définition axe Y (nombre). Min = -0.4 Max = 1 Interval = 0.2
chart.ChartAreas["draw"].AxisY.Minimum = -0.4;
chart.ChartAreas["draw"].AxisY.Maximum = 1;
chart.ChartAreas["draw"].AxisY.Interval = 0.2;
chart.ChartAreas["draw"].AxisY.LabelStyle.IntervalType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY.LabelStyle.IntervalOffsetType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY.LabelStyle.Interval = 0.1; // Ajoute un label tous les 0.1
chart.ChartAreas["draw"].AxisY.LabelStyle.IntervalOffset = 0D;
chart.ChartAreas["draw"].AxisY.LabelStyle.Format = ".000";
// Définition grille axe Y . Interval tous les 0.1, lignes tirets blancs
chart.ChartAreas["draw"].AxisY.MajorGrid.Interval = 0.1; // 1 entre chaque graduation (grille traversant l'axe Y horizontalement)
chart.ChartAreas["draw"].AxisY.MajorGrid.IntervalType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY.MajorGrid.IntervalOffset = 0D;
chart.ChartAreas["draw"].AxisY.MajorGrid.IntervalOffsetType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY.MajorGrid.LineColor = Color.White;
chart.ChartAreas["draw"].AxisY.MajorGrid.LineDashStyle = Graph.ChartDashStyle.Dash;
// Définition grille axe secondaire Y . Lignes pointillées
chart.ChartAreas["draw"].AxisY2.MajorGrid.LineColor = Color.BurlyWood;
chart.ChartAreas["draw"].AxisY2.MajorGrid.LineDashStyle = Graph.ChartDashStyle.Dot;
// Couleur de fond du tracé
chart.ChartAreas["draw"].BackColor = Color.Black;
// Create two new functions series
chart.Series.Add("MyFunc");
chart.Series.Add("MyFunc2");
// Set the type to line
chart.Series["MyFunc"].ChartType = Graph.SeriesChartType.Line;
chart.Series["MyFunc2"].ChartType = Graph.SeriesChartType.Line;
// Ajouter un tooltip sur la valeur pointée
chart.Series["MyFunc"].ToolTip = "#VAL";
chart.Series["MyFunc2"].ToolTip = "#VAL";
// Color the line of the graph light green and give it a thickness of 3
chart.Series["MyFunc"].Color = Color.LightGreen;
chart.Series["MyFunc"].BorderWidth = 3;
chart.Series["MyFunc2"].Color = Color.Bisque;
chart.Series["MyFunc2"].BorderWidth = 3;
// Définition des types de données sur les axes X et Y des séries de données
chart.Series["MyFunc"].XValueType = Graph.ChartValueType.DateTime;
chart.Series["MyFunc"].YValueType = Graph.ChartValueType.Double;
chart.Series["MyFunc"].XAxisType = Graph.AxisType.Primary;
chart.Series["MyFunc"].YAxisType = Graph.AxisType.Primary;
chart.Series["MyFunc2"].XValueType = Graph.ChartValueType.DateTime;
chart.Series["MyFunc2"].YValueType = Graph.ChartValueType.Double;
chart.Series["MyFunc2"].XAxisType = Graph.AxisType.Primary;
chart.Series["MyFunc2"].YAxisType = Graph.AxisType.Secondary;
//This function cannot include zero, and we walk through it in steps of 0.1 to add coordinates to our series
DateTime dto;
dto = new DateTime();
for (double x = 0.1; x < 20; x += 0.1)
{
chart.Series["MyFunc"].Points.AddXY(dto, Math.Sin(x) / x);
chart.Series["MyFunc2"].Points.AddXY(dto, Math.Cos(x) / x);
dto = dto.AddSeconds(1);
}
// Ajout des légendes
chart.Series["MyFunc"].LegendText = "sin(x) / x";
chart.Series["MyFunc2"].LegendText = "cos(x) / x";
// Create a new legend called "MyLegend".
chart.Legends.Add("MyLegend");
chart.Legends["MyLegend"].BorderColor = Color.Tomato; // I like tomato juice!
// Autorisation de zoomer
chart.ChartAreas["draw"].AxisY.ScaleView.Zoomable = true;
chart.ChartAreas["draw"].AxisY2.ScaleView.Zoomable = true;
chart.ChartAreas["draw"].AxisX.ScaleView.Zoomable = true;
// Définition des curseurs en X et Y afin de pouvoir sélectionner la zone à zoomer
chart.ChartAreas["draw"].CursorX.IsUserSelectionEnabled = true;
chart.ChartAreas["draw"].CursorX.IntervalOffsetType = Graph.DateTimeIntervalType.Milliseconds;
chart.ChartAreas["draw"].CursorX.IntervalType = Graph.DateTimeIntervalType.Milliseconds;
chart.ChartAreas["draw"].CursorX.IsUserEnabled = true;
chart.ChartAreas["draw"].CursorY.IsUserEnabled = true;
chart.ChartAreas["draw"].CursorY.IntervalOffsetType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].CursorY.IntervalType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].CursorY.IsUserSelectionEnabled = true;
chart.ChartAreas["draw"].CursorY.Interval = 0.001; // Valeur minimum sélectionnable par l'utilisateur (on ne peut pas zoomer au delà)
// Définition des mises à l'échelles et des barres de défilements axe X et Y
chart.ChartAreas["draw"].AxisX.ScaleBreakStyle.Enabled = true;
chart.ChartAreas["draw"].AxisX.ScaleView.MinSize = 0D;
chart.ChartAreas["draw"].AxisX.ScaleView.MinSizeType = Graph.DateTimeIntervalType.Milliseconds;
chart.ChartAreas["draw"].AxisX.ScaleView.SizeType = Graph.DateTimeIntervalType.Milliseconds;
chart.ChartAreas["draw"].AxisX.ScaleView.SmallScrollMinSize = 0D;
chart.ChartAreas["draw"].AxisX.ScaleView.SmallScrollMinSizeType = Graph.DateTimeIntervalType.Milliseconds;
chart.ChartAreas["draw"].AxisX.ScaleView.SmallScrollSizeType = Graph.DateTimeIntervalType.Milliseconds;
chart.ChartAreas["draw"].AxisY.ScaleView.MinSize = 0.1D;
chart.ChartAreas["draw"].AxisY.ScaleView.MinSizeType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY.ScaleView.SizeType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY.ScaleView.SmallScrollMinSize = 0.001D;
chart.ChartAreas["draw"].AxisY.ScaleView.SmallScrollMinSizeType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY.ScaleView.SmallScrollSizeType = Graph.DateTimeIntervalType.Number;
//chart.ChartAreas["draw"].AxisY.LabelStyle.IsStaggered = false;
// Couleur des scrollbars
chart.ChartAreas["draw"].AxisX.ScrollBar.BackColor = Color.AliceBlue;
chart.ChartAreas["draw"].AxisX.ScrollBar.ButtonColor = Color.LightBlue;
chart.ChartAreas["draw"].AxisY.ScrollBar.BackColor = Color.AliceBlue;
chart.ChartAreas["draw"].AxisY.ScrollBar.ButtonColor = Color.LightBlue;
// On ajoute à la form le chart (sinon, on ne sait pas ou l'afficher !)
Controls.Add(this.chart);
}
你有任何想法做到這一點。 沒有任何代碼，它適用於X軸，但不適用於Y軸。 我認為可以對AxisChanged事件做一些事情，但是非常棘手。 希望我的問題清楚！ 英語不是我最喜歡的語言！
1 個解決方案
解決方案1
0 2015-11-24 14:14:01
一些更新我的問題。
我在AxisViewChanged上添加了一個事件處理程序。 在此事件處理程序中，我根據AxisY.ScaleView.ViewMinimum值更新Y軸上的標簽，網格和間隔。
此事件處理程序還會調整有關Y軸縮放的輔助軸的大小。
Graph.Chart chart;
double MaxY2;
double MinY2;
public Form1()
{
InitializeComponent();
this.ClientSize = new System.Drawing.Size(750, 750);
// Create new Graph
chart = new Graph.Chart();
// Define size and chart model
chart.Location = new System.Drawing.Point(10, 10);
chart.Size = new System.Drawing.Size(700, 700);
chart.BackGradientStyle = Graph.GradientStyle.LeftRight;
chart.BorderSkin.SkinStyle = Graph.BorderSkinStyle.Emboss;
// Add a chartarea called "draw", add axes to it and color the area black
chart.ChartAreas.Add("draw");
// Define X axis interval type (seconds). Width 200s, interval = 10s, label every 30s
chart.ChartAreas["draw"].AxisX.IntervalType = Graph.DateTimeIntervalType.Seconds;
chart.ChartAreas["draw"].AxisX.Interval = 10; // Add a tick every 10s interval on X axis (careful, it's different from the grid !!!)
chart.ChartAreas["draw"].AxisX.Title = "Time (s)";
chart.ChartAreas["draw"].AxisX.IntervalOffsetType = Graph.DateTimeIntervalType.Seconds;
chart.ChartAreas["draw"].AxisX.LabelStyle.IntervalType = Graph.DateTimeIntervalType.Seconds;
chart.ChartAreas["draw"].AxisX.LabelStyle.IntervalOffsetType = Graph.DateTimeIntervalType.Seconds;
chart.ChartAreas["draw"].AxisX.LabelStyle.Interval = 30; // Add a label every 30s
chart.ChartAreas["draw"].AxisX.LabelStyle.IntervalOffset = 0D;
chart.ChartAreas["draw"].AxisX.LabelStyle.Format = "H:mm:ss";
chart.ChartAreas["draw"].AxisX.Minimum = 0; // X axis unit is a day ! (don't know why )
chart.ChartAreas["draw"].AxisX.Maximum = 200.0/(24.0*60.0*60.0); // Unit is a day so convert second in day unit => 200s => 200s / (24h*60m*60s)
// X Axis grid definition. Interval every 10s, dash line
chart.ChartAreas["draw"].AxisX.MajorGrid.Interval = 10; // 10s between each tick (grid cross X axis vertically)
chart.ChartAreas["draw"].AxisX.MajorGrid.IntervalType = Graph.DateTimeIntervalType.Seconds;
chart.ChartAreas["draw"].AxisX.MajorGrid.IntervalOffset = 0D;
chart.ChartAreas["draw"].AxisX.MajorGrid.IntervalOffsetType = Graph.DateTimeIntervalType.Seconds;
chart.ChartAreas["draw"].AxisX.MajorGrid.LineColor = Color.White;
chart.ChartAreas["draw"].AxisX.MajorGrid.LineDashStyle = Graph.ChartDashStyle.Dash;
// Y axis definition (number). Min = -0.4 Max = 1 Interval = 0.2
chart.ChartAreas["draw"].AxisY.Minimum = -0.4;
chart.ChartAreas["draw"].AxisY.Maximum = 1;
chart.ChartAreas["draw"].AxisY.Interval = 0.2;
chart.ChartAreas["draw"].AxisY.LabelStyle.IntervalType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY.LabelStyle.IntervalOffsetType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY.LabelStyle.IntervalOffset = 0D;
chart.ChartAreas["draw"].AxisY.LabelStyle.Interval = 0.1; // Add a label every 0.1
chart.ChartAreas["draw"].AxisY.LabelStyle.Format = ".000";
// Secondary Y axis definition (number). Min = -2 Max = 10 Interval = 0.5
chart.ChartAreas["draw"].AxisY2.Minimum = -2;
chart.ChartAreas["draw"].AxisY2.Maximum = 10;
chart.ChartAreas["draw"].AxisY2.Interval = 0.5;
chart.ChartAreas["draw"].AxisY2.LabelStyle.IntervalType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY2.LabelStyle.IntervalOffsetType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY2.LabelStyle.IntervalOffset = 0D;
chart.ChartAreas["draw"].AxisY2.LabelStyle.Interval = 0.5; // Add a label every 0.5
chart.ChartAreas["draw"].AxisY2.LabelStyle.Format = ".000";
// Y Axis grid definition. Interval every 0.1, dash line
chart.ChartAreas["draw"].AxisY.MajorGrid.Interval = 0.1; // 0.1 between each tick (grid cross Y axis horizontaly)
chart.ChartAreas["draw"].AxisY.MajorGrid.IntervalType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY.MajorGrid.IntervalOffset = 0D;
chart.ChartAreas["draw"].AxisY.MajorGrid.IntervalOffsetType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY.MajorGrid.LineColor = Color.White;
chart.ChartAreas["draw"].AxisY.MajorGrid.LineDashStyle = Graph.ChartDashStyle.Dash;
// Secondary Y Axis grid definition. Dot line
chart.ChartAreas["draw"].AxisY2.MajorGrid.LineColor = Color.BurlyWood;
chart.ChartAreas["draw"].AxisY2.MajorGrid.LineDashStyle = Graph.ChartDashStyle.Dot;
// Chart Area back ground color
chart.ChartAreas["draw"].BackColor = Color.Black;
// Create two new functions series
chart.Series.Add("MyFunc");
chart.Series.Add("MyFunc2");
// Set the type to line
chart.Series["MyFunc"].ChartType = Graph.SeriesChartType.Line;
chart.Series["MyFunc2"].ChartType = Graph.SeriesChartType.Line;
// Value tooltip on each series
chart.Series["MyFunc"].ToolTip = "#VAL";
chart.Series["MyFunc2"].ToolTip = "#VAL";
// Color the line of the graph light green and give it a thickness of 3
chart.Series["MyFunc"].Color = Color.LightGreen;
chart.Series["MyFunc"].BorderWidth = 3;
chart.Series["MyFunc2"].Color = Color.Bisque;
chart.Series["MyFunc2"].BorderWidth = 3;
// Data type definition for the two series (define X and Y axis for each series)
chart.Series["MyFunc"].XValueType = Graph.ChartValueType.DateTime;
chart.Series["MyFunc"].YValueType = Graph.ChartValueType.Double;
chart.Series["MyFunc"].XAxisType = Graph.AxisType.Primary;
chart.Series["MyFunc"].YAxisType = Graph.AxisType.Primary;
chart.Series["MyFunc2"].XValueType = Graph.ChartValueType.DateTime;
chart.Series["MyFunc2"].YValueType = Graph.ChartValueType.Double;
chart.Series["MyFunc2"].XAxisType = Graph.AxisType.Primary;
chart.Series["MyFunc2"].YAxisType = Graph.AxisType.Secondary;
//This function cannot include zero, and we walk through it in steps of 0.1 to add coordinates to our series
DateTime dto;
dto = new DateTime();
for (double x = 0.1; x < 20; x += 0.1)
{
chart.Series["MyFunc"].Points.AddXY(dto, Math.Sin(x) / x);
chart.Series["MyFunc2"].Points.AddXY(dto, Math.Cos(x) / x);
dto = dto.AddSeconds(1);
}
// Add legend to the chart area
chart.Series["MyFunc"].LegendText = "sin(x) / x";
chart.Series["MyFunc2"].LegendText = "cos(x) / x";
// Create a new legend called "MyLegend".
chart.Legends.Add("MyLegend");
chart.Legends["MyLegend"].BorderColor = Color.Tomato; // I like tomato juice!
// Zoom allowed for X and Y axis (done manualy on secondary Y axis)
chart.ChartAreas["draw"].AxisY.ScaleView.Zoomable = true;
chart.ChartAreas["draw"].AxisY2.ScaleView.Zoomable = true;
chart.ChartAreas["draw"].AxisX.ScaleView.Zoomable = true;
// X and Y axis cursor definition.
chart.ChartAreas["draw"].CursorX.IsUserSelectionEnabled = true;
chart.ChartAreas["draw"].CursorX.IntervalOffsetType = Graph.DateTimeIntervalType.Milliseconds;
chart.ChartAreas["draw"].CursorX.IntervalType = Graph.DateTimeIntervalType.Milliseconds;
chart.ChartAreas["draw"].CursorX.IsUserEnabled = true;
chart.ChartAreas["draw"].CursorY.IsUserEnabled = true;
chart.ChartAreas["draw"].CursorY.IntervalOffsetType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].CursorY.IntervalType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].CursorY.IsUserSelectionEnabled = true;
chart.ChartAreas["draw"].CursorY.Interval = 0.001D; // Minimum value for zooming
// Définition des mises à l'échelles et des barres de défilements axe X et Y
chart.ChartAreas["draw"].AxisX.ScaleView.MinSize = 0D;
chart.ChartAreas["draw"].AxisX.ScaleView.MinSizeType = Graph.DateTimeIntervalType.Milliseconds;
chart.ChartAreas["draw"].AxisX.ScaleView.SizeType = Graph.DateTimeIntervalType.Milliseconds;
chart.ChartAreas["draw"].AxisX.ScaleView.SmallScrollMinSize = 0D;
chart.ChartAreas["draw"].AxisX.ScaleView.SmallScrollMinSizeType = Graph.DateTimeIntervalType.Milliseconds;
chart.ChartAreas["draw"].AxisX.ScaleView.SmallScrollSizeType = Graph.DateTimeIntervalType.Milliseconds;
chart.ChartAreas["draw"].AxisY.ScaleView.MinSize = 0.1D;
chart.ChartAreas["draw"].AxisY.ScaleView.MinSizeType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY.ScaleView.SizeType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY.ScaleView.SmallScrollMinSize = 0.001D;
chart.ChartAreas["draw"].AxisY.ScaleView.SmallScrollMinSizeType = Graph.DateTimeIntervalType.Number;
chart.ChartAreas["draw"].AxisY.ScaleView.SmallScrollSizeType = Graph.DateTimeIntervalType.Number;
// Scrollbar color definition
chart.ChartAreas["draw"].AxisX.ScrollBar.BackColor = Color.AliceBlue;
chart.ChartAreas["draw"].AxisX.ScrollBar.ButtonColor = Color.LightBlue;
chart.ChartAreas["draw"].AxisY.ScrollBar.BackColor = Color.AliceBlue;
chart.ChartAreas["draw"].AxisY.ScrollBar.ButtonColor = Color.LightBlue;
// Add the chart to the form (to display it)
Controls.Add(this.chart);
// For save and use in AxisViewChanged event
MaxY2 = chart.ChartAreas["draw"].AxisY2.Maximum;
MinY2 = chart.ChartAreas["draw"].AxisY2.Minimum;
// Add event handler on axis view changed (to automatically scroll Y and Y2 axis)
chart.AxisViewChanged += new System.EventHandler<System.Windows.Forms.DataVisualization.Charting.ViewEventArgs>(chart_AxisViewChanged);
}
private void chart_AxisViewChanged(object sender, Graph.ViewEventArgs e)
{
// AxisY.ScaleView.ViewMinimum is the minimum Y axis value displayed. It contains the offset to apply to label, grid and interval on Y axis
chart.ChartAreas["draw"].AxisY.LabelStyle.IntervalOffset = (chart.ChartAreas["draw"].AxisY.LabelStyle.Interval - chart.ChartAreas["draw"].AxisY.ScaleView.ViewMinimum) % chart.ChartAreas["draw"].AxisY.LabelStyle.Interval;
chart.ChartAreas["draw"].AxisY.MajorGrid.IntervalOffset = (chart.ChartAreas["draw"].AxisY.MajorGrid.Interval - chart.ChartAreas["draw"].AxisY.ScaleView.ViewMinimum) % chart.ChartAreas["draw"].AxisY.MajorGrid.Interval;
chart.ChartAreas["draw"].AxisY.IntervalOffset = (chart.ChartAreas["draw"].AxisY.Interval - chart.ChartAreas["draw"].AxisY.ScaleView.ViewMinimum) % chart.ChartAreas["draw"].AxisY.Interval;
// To compute zoom percent to apply on secondary Y axis :
// zoomPercent = (Max - Min displayed values) / ( Max - Min Y axis values)
double zoomPercent = (chart.ChartAreas["draw"].AxisY.ScaleView.ViewMaximum - chart.ChartAreas["draw"].AxisY.ScaleView.ViewMinimum) /
(chart.ChartAreas["draw"].AxisY.Maximum - chart.ChartAreas["draw"].AxisY.Minimum);
// To compute the position in percent on Y axis
// posPercent = (Min displayed value - Min value) / ( Max - Min Y axis values)
double posPercent = (chart.ChartAreas["draw"].AxisY.ScaleView.ViewMinimum - chart.ChartAreas["draw"].AxisY.Minimum) / (chart.ChartAreas["draw"].AxisY.Maximum - chart.ChartAreas["draw"].AxisY.Minimum);
// To compute max and min secondary axis value regarding posPercent and zoomPercent
// We need to have the original Max and Min value for secondary Y axis. This should be saved somewhere (MaxY2 and MinY2 here).
chart.ChartAreas["draw"].AxisY2.Minimum = (posPercent * (MaxY2 - MinY2)) + MinY2;
chart.ChartAreas["draw"].AxisY2.Maximum = (zoomPercent * (MaxY2 - MinY2)) + chart.ChartAreas["draw"].AxisY2.Minimum;
// To update secondary Y axis label, major grid and interval. (same method as for Y axis above)
chart.ChartAreas["draw"].AxisY2.LabelStyle.IntervalOffset = (chart.ChartAreas["draw"].AxisY2.LabelStyle.Interval - chart.ChartAreas["draw"].AxisY2.Minimum) % chart.ChartAreas["draw"].AxisY2.LabelStyle.Interval;
chart.ChartAreas["draw"].AxisY2.MajorGrid.IntervalOffset = (chart.ChartAreas["draw"].AxisY2.MajorGrid.Interval - chart.ChartAreas["draw"].AxisY2.Minimum) % chart.ChartAreas["draw"].AxisY2.MajorGrid.Interval;
chart.ChartAreas["draw"].AxisY2.IntervalOffset = (chart.ChartAreas["draw"].AxisY2.Interval - chart.ChartAreas["draw"].AxisY2.Minimum) % chart.ChartAreas["draw"].AxisY2.Interval;
}
這解決了我的問題。 然而，這是一個非常復雜的解決方案（並且肯定很耗時）！
有人還有其他解決方案嗎？
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