MS Chart Control中需要垂直光標提示

Question

我有一個顯示某些時間序列數據的折線圖控件。我想在線圖上放置幾個垂直光標，顯示該圖的重要點。 Afaik在控件中有兩個可用的遊標，一個是垂直的和一個是水平的。我不需要遊標是可移動的，我只是想要指出特定的地方。在MS圖表控件中實現這一點的首選方法是什麼？

Answer 1

嘗試這樣的：

using System.Windows.Forms.DataVisualization.Charting; 
... 

this.chart1.CursorPositionChanging += new System.Windows.Forms.DataVisualization.Charting.Chart.CursorEventHandler(this.chart1_CursorPositionChanging); 
... 

// Edit Controls 
private System.Windows.Forms.TextBox CursorX; 
private System.Windows.Forms.TextBox CursorY; 

// Cursor Position Changing Event 
private void chart1_CursorPositionChanging(object sender, System.Windows.Forms.DataVisualization.Charting.CursorEventArgs e) 
{ 
    SetPosition(e.Axis, e.NewPosition); 
} 

// Set Cursor Position to Edit control. 
private void SetPosition(Axis axis, double position) 
{ 
    if(double.IsNaN(position)) 
     return; 

    if(axis.AxisName == AxisName.X) 
    { 
     // Convert Double to DateTime. 
     DateTime dateTimeX = DateTime.FromOADate(position); 

     // Set X cursor position to edit Control 
     CursorX.Text = dateTimeX.ToLongDateString(); 
    } 
    else 
    { 
     // Set Y cursor position to edit Control 
     CursorY.Text = position.ToString(); 
    } 
} 
... 

Answer 2

使用垂直線註解。

double xPosition1 = 5; 
chart.VerticalLineAnnotation annotationVerticalLine1 = new chart.VerticalLineAnnotation(); 
      annotationVerticalLine1.AxisX = chart1.ChartAreas["ChartArea1"].AxisX; 
      annotationVerticalLine1.AxisY = chart1.ChartAreas["ChartArea1"].AxisY; 
      annotationVerticalLine1.IsSizeAlwaysRelative = false; 
      annotationVerticalLine1.AnchorX = xPosition1; 
      annotationVerticalLine1.IsInfinitive = true; 
      annotationVerticalLine1.ClipToChartArea = chart1.ChartAreas["ChartArea1"].Name; 
      annotationVerticalLine1.LineColor = Color.Red; 
      annotationVerticalLine1.LineWidth = 1; 
      chart1.Annotations.Add(annotationVerticalLine1); 

      double xPosition2 = 10; 
      chart.VerticalLineAnnotation annotationVerticalLine2 = new chart.VerticalLineAnnotation(); 
      annotationVerticalLine2.AxisX = chart1.ChartAreas["ChartArea1"].AxisX; 
      annotationVerticalLine2.AxisY = chart1.ChartAreas["ChartArea1"].AxisY; 
      annotationVerticalLine2.IsSizeAlwaysRelative = false; 
      annotationVerticalLine2.AnchorX = xPosition2; 
      annotationVerticalLine2.IsInfinitive = true; 
      annotationVerticalLine2.ClipToChartArea = chart1.ChartAreas["ChartArea1"].Name; 
      annotationVerticalLine2.LineColor = Color.Red; 
      annotationVerticalLine2.LineWidth = 1; 
      chart1.Annotations.Add(annotationVerticalLine2);