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  • MS Chart 折线图点击数据点时显示其值

    对于MS Chart当鼠标移动到数据点时或鼠标点击数据点时显示其点的值(X,Y)值

     public partial class Form1 : Form
        {
    
            System.Windows.Forms.DataVisualization.Charting.ToolTipEventArgs toolTipEventArgs;
    
            public Form1()
            {
                InitializeComponent();
            }
    
    
            //鼠标移动到数据点时显示点的数值
            private void chart1_GetToolTipText(object sender, System.Windows.Forms.DataVisualization.Charting.ToolTipEventArgs e)
            {
                toolTipEventArgs = e;
    
                if (e.HitTestResult.ChartElementType == System.Windows.Forms.DataVisualization.Charting.ChartElementType.DataPoint)
                {
                    int i = e.HitTestResult.PointIndex;
                    System.Windows.Forms.DataVisualization.Charting.DataPoint dp = e.HitTestResult.Series.Points[i];
                    e.Text = string.Format("次数:{0},数值:{1}", dp.XValue.ToString(), dp.YValues[0]);
                }
    
            }
    
            //鼠标点击数据点时得到数据点的值
            private void chart1_Click(object sender, EventArgs e)
            {
                if (toolTipEventArgs.HitTestResult.PointIndex < 0)
                {
                    return;
                }
                if (toolTipEventArgs.HitTestResult.ChartElementType == System.Windows.Forms.DataVisualization.Charting.ChartElementType.DataPoint)
                {
                    int i = toolTipEventArgs.HitTestResult.PointIndex;
                    System.Windows.Forms.DataVisualization.Charting.DataPoint dp = toolTipEventArgs.HitTestResult.Series.Points[i];
                    textBox1.Text = dp.XValue.ToString();
                    textBox2.Text = dp.YValues[0].ToString();
                }
    
            }
        }
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  • 原文地址:https://www.cnblogs.com/YuanDong1314/p/8967672.html
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