MSCHART 抄下来的一些代码 实现了批注

 private void InitializeComponent()
        {
            System.Windows.Forms.DataVisualization.Charting.ChartArea chartArea1 = new System.Windows.Forms.DataVisualization.Charting.ChartArea();
            System.Windows.Forms.DataVisualization.Charting.Legend legend1 = new System.Windows.Forms.DataVisualization.Charting.Legend();
            System.Windows.Forms.DataVisualization.Charting.Series series1 = new System.Windows.Forms.DataVisualization.Charting.Series();
            this.chart1 = new System.Windows.Forms.DataVisualization.Charting.Chart();
            this.toolStripContainer1 = new System.Windows.Forms.ToolStripContainer();
            ((System.ComponentModel.ISupportInitialize)(this.chart1)).BeginInit();
            this.toolStripContainer1.ContentPanel.SuspendLayout();
            this.toolStripContainer1.SuspendLayout();
            this.SuspendLayout();
            // 
            // chart1
            // 
            chartArea1.Area3DStyle.Enable3D = true;
            chartArea1.AxisX.IntervalAutoMode = System.Windows.Forms.DataVisualization.Charting.IntervalAutoMode.VariableCount;
            chartArea1.AxisX.IntervalOffset = 1;
            chartArea1.AxisX.IsLabelAutoFit = false;
            chartArea1.AxisX.LabelStyle.Angle = 90;
            chartArea1.Name = "ChartArea1";
            this.chart1.ChartAreas.Add(chartArea1);
            this.chart1.Dock = System.Windows.Forms.DockStyle.Fill;
            legend1.Docking = System.Windows.Forms.DataVisualization.Charting.Docking.Bottom;
            legend1.Name = "Legend1";
            this.chart1.Legends.Add(legend1);
            this.chart1.Location = new System.Drawing.Point(0, 0);
            this.chart1.Name = "chart1";
            series1.ChartArea = "ChartArea1";
            series1.IsValueShownAsLabel = true;
            series1.Legend = "Legend1";
            series1.LegendText = "PC";
            series1.Name = "Series1";
            series1.XValueMember = "SaleMonth";
            series1.YValueMembers = "DepQty,DepID";
            series1.YValuesPerPoint = 2;
            this.chart1.Series.Add(series1);
            this.chart1.Size = new System.Drawing.Size(534, 417);
            this.chart1.TabIndex = 0;
            this.chart1.Text = "chart1";
            // 
            // toolStripContainer1
            // 
            // 
            // toolStripContainer1.ContentPanel
            // 
            this.toolStripContainer1.ContentPanel.Controls.Add(this.chart1);
            this.toolStripContainer1.ContentPanel.Size = new System.Drawing.Size(534, 417);
            this.toolStripContainer1.Dock = System.Windows.Forms.DockStyle.Fill;
            this.toolStripContainer1.Location = new System.Drawing.Point(0, 0);
            this.toolStripContainer1.Name = "toolStripContainer1";
            this.toolStripContainer1.Size = new System.Drawing.Size(534, 417);
            this.toolStripContainer1.TabIndex = 1;
            this.toolStripContainer1.Text = "toolStripContainer1";
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(534, 417);
            this.Controls.Add(this.toolStripContainer1);
            this.Name = "Form1";
            this.Text = "Form1";
            this.Load += new System.EventHandler(this.Form1_Load);
            ((System.ComponentModel.ISupportInitialize)(this.chart1)).EndInit();
            this.toolStripContainer1.ContentPanel.ResumeLayout(false);
            this.toolStripContainer1.ResumeLayout(false);
            this.toolStripContainer1.PerformLayout();
            this.ResumeLayout(false);

        }

        #endregion

        private System.Windows.Forms.DataVisualization.Charting.Chart chart1;
        private System.Windows.Forms.ToolStripContainer toolStripContainer1;
    }
}

　　

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

namespace MSChartDemo
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            chart1.DataSource = new DataInfo().GetDataTable();
            chart1.DataBind();
            SetAnn();
        }

        private void SetAnn()
        {
            CalloutAnnotation caMax = new CalloutAnnotation();
            caMax.Name = "caMax";
            caMax.Text = "賣最好";
            caMax.ToolTip = "金額 : #VAL{#,##0}";
            caMax.CalloutStyle = CalloutStyle.Rectangle;
            caMax.AnchorDataPoint = chart1.Series[0].Points.FindMaxByValue();
            caMax.Width = double.NaN;
            caMax.Height = double.NaN;
            caMax.X = double.NaN;
            caMax.Y = double.NaN;
            caMax.AllowMoving = true;
            if (chart1.Annotations.FindByName("caMax") != null)
            {
                chart1.Annotations.Remove(chart1.Annotations.FindByName("caMax"));
            }
            chart1.Annotations.Add(caMax);

            //最大值的直條圖設為紅色
            chart1.Series[0].Points.FindMaxByValue().Color = System.Drawing.Color.Red;

            CalloutAnnotation caMin = new CalloutAnnotation();
            caMin.Name = "caMin";
            caMin.Text = "賣最差";
            caMin.ToolTip = "金額 : #VAL{#,##0}";
            caMin.CalloutStyle = CalloutStyle.RoundedRectangle;
            caMin.AnchorDataPoint = chart1.Series[0].Points.FindMinByValue();
            caMin.Width = double.NaN;
            caMin.Height = double.NaN;
            caMin.X = double.NaN;
            caMin.Y = double.NaN;
            caMin.AllowMoving = true;
            if (chart1.Annotations.FindByName("caMin") != null)
            {
                chart1.Annotations.Remove(chart1.Annotations.FindByName("caMin"));
            }

            //最小值的直條圖設為黑色
            chart1.Series[0].Points.FindMinByValue().Color = System.Drawing.Color.Black;

            chart1.Annotations.Add(caMin);
        }
    }
}