Microsoft Chart Controls（简称MSChart）控件，给图形统计和报表图形显示提供了很好的解决办法，同时支持Web和WinForm两种方式。

MSChart 在.NET 4.0自带的有，.NET 3.5 需要下载相应的插件（如果用的是VS2010做开发但是选择的版本是3.5的而不是默认的4.0话，请按本文介绍的.NET 3.5 进行插件安装），

官方例子（web和winform）：http://archive.msdn.microsoft.com/mschart/Release/ProjectReleases.aspx?ReleaseId=4418

插件下载地址：http://archive.msdn.microsoft.com/mschart，把下面四个下载完成后把前三个按顺序安装

安装完成之后，在C:\Program Files\Microsoft Chart Controls\Assemblies可以获取到web和winform的DLL。对于.NET 3.5 只需要把 System.Windows.Forms.DataVisualization.dll 添加到工具箱即可获得图表控件。前台只需要从工具箱拖一个Chart控件即可，如下图所示：

本文用MSChart实现Winform曲线图的绘制，本文结合自己的实际项目，每个点需要显示到秒（这也是本文需要解决的关键点），刚开始照着网上的例子实现了一下，样子是出来了，但是当数据一多并且显示到秒时用鼠标进行拖动放大页面会直接卡死，后来经过自己的一番探索和研究，终于把这个问题给解决了，故把整个实现过程记录下来，和大家分享一下。

在文章的后面附上了源码，源码有详细的代码注释，一些需要注意的属性设置都有说明，可以实现刻度到秒的拖动放大，两条红色分别我定义是Min和Max值基准，是为了表达一个区间的概念。页面上绘制了一千个点，每个点上有相应的ToolTip提示。代码没有做拆分，只是把整个创建及设置的流程给描述下来，是为了让需要的朋友更好的理解和使用，第一次写博文，希望大家给予指正与支持，谢谢。

附上效果图：

附上后台源码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;
using Hyet.Dal;
using Hxj.Model;
using Hxj.Data;
using System.Collections;
using Hyet.BLL;

namespace DigitalFactory.ReportForms
{
public partial class ChartInfo : Form
{
public ChartInfo()
{
InitializeComponent();

InitializeChart();

this.myChart.GetToolTipText += new EventHandler<ToolTipEventArgs>(myChart_GetToolTipText);
}

private void InitializeChart()
{
myChart.ChartAreas.Clear();
myChart.Series.Clear();

#region 设置图表的属性
//图表的背景色
myChart.BackColor = Color.FromArgb(211, 223, 240);
//图表背景色的渐变方式
myChart.BackGradientStyle = GradientStyle.TopBottom;
//图表的边框颜色、
myChart.BorderlineColor = Color.FromArgb(26, 59, 105);
//图表的边框线条样式
myChart.BorderlineDashStyle = ChartDashStyle.Solid;
//图表边框线条的宽度
myChart.BorderlineWidth = 2;
//图表边框的皮肤
myChart.BorderSkin.SkinStyle = BorderSkinStyle.Emboss;
#endregion

#region 设置图表的标题
Title title = new Title();
//标题内容
title.Text = "曲线图";
//标题的字体
title.Font = new System.Drawing.Font("Microsoft Sans Serif", 12, FontStyle.Bold);
//标题字体颜色
title.ForeColor = Color.FromArgb(26, 59, 105);
//标题阴影颜色
title.ShadowColor = Color.FromArgb(32, 0, 0, 0);
//标题阴影偏移量
title.ShadowOffset = 3;
myChart.Titles.Add(title);
#endregion

#region 设置图例的属性
//注意，需要把原来控件自带的图例删除掉
this.myChart.Legends.Clear();

Legend legend = new Legend("Default");
legend.Alignment = StringAlignment.Center;
legend.Docking = Docking.Bottom;
legend.LegendStyle = LegendStyle.Column;
this.myChart.Legends.Add(legend);

// Add header separator of type line
legend.HeaderSeparator = LegendSeparatorStyle.Line;
legend.HeaderSeparatorColor = Color.Gray;

LegendCellColumn firstColumn = new LegendCellColumn();
firstColumn.ColumnType = LegendCellColumnType.SeriesSymbol;
firstColumn.HeaderText = "Color";
firstColumn.HeaderBackColor = Color.WhiteSmoke;
myChart.Legends["Default"].CellColumns.Add(firstColumn);

// Add Legend Text column
LegendCellColumn secondColumn = new LegendCellColumn();
secondColumn.ColumnType = LegendCellColumnType.Text;
secondColumn.HeaderText = "Name";
secondColumn.Text = "#LEGENDTEXT";
secondColumn.HeaderBackColor = Color.WhiteSmoke;
myChart.Legends["Default"].CellColumns.Add(secondColumn);

// Add AVG cell column
LegendCellColumn avgColumn = new LegendCellColumn();
avgColumn.Text = "#AVG{N2}";
avgColumn.HeaderText = "Avg";
avgColumn.Name = "AvgColumn";
avgColumn.HeaderBackColor = Color.WhiteSmoke;
myChart.Legends["Default"].CellColumns.Add(avgColumn);

// Add Total cell column
LegendCellColumn totalColumn = new LegendCellColumn();
totalColumn.Text = "#TOTAL{N1}";
totalColumn.HeaderText = "Total";
totalColumn.Name = "TotalColumn";
totalColumn.HeaderBackColor = Color.WhiteSmoke;
myChart.Legends["Default"].CellColumns.Add(totalColumn);

// Set Min cell column attributes
LegendCellColumn minColumn = new LegendCellColumn();
minColumn.Text = "#MIN{N1}";
minColumn.HeaderText = "Min";
minColumn.Name = "MinColumn";
minColumn.HeaderBackColor = Color.WhiteSmoke;
myChart.Legends["Default"].CellColumns.Add(minColumn);

// Set Max cell column attributes
LegendCellColumn maxColumn = new LegendCellColumn();
maxColumn.Text = "#MAX{N1}";
maxColumn.HeaderText = "Max";
maxColumn.Name = "MaxColumn";
maxColumn.HeaderBackColor = Color.WhiteSmoke;
myChart.Legends["Default"].CellColumns.Add(maxColumn);

#endregion

#region 设置图表区属性
ChartArea chartArea = new ChartArea("Default");
//设置Y轴刻度间隔大小
chartArea.AxisY.Interval = 5;
//设置Y轴的数据类型格式
//chartArea.AxisY.LabelStyle.Format = "C";
//设置背景色
chartArea.BackColor = Color.FromArgb(64, 165, 191, 228);
//设置背景渐变方式
chartArea.BackGradientStyle = GradientStyle.TopBottom;
//设置渐变和阴影的辅助背景色
chartArea.BackSecondaryColor = Color.White;
//设置边框颜色
chartArea.BorderColor = Color.FromArgb(64, 64, 64, 64);
//设置阴影颜色
chartArea.ShadowColor = Color.Transparent;
//设置X轴和Y轴线条的颜色
chartArea.AxisX.LineColor = Color.FromArgb(64, 64, 64, 64);
chartArea.AxisY.LineColor = Color.FromArgb(64, 64, 64, 64);
//设置X轴和Y轴线条的宽度
chartArea.AxisX.LineWidth = 1;
chartArea.AxisY.LineWidth = 1;
//设置X轴和Y轴的标题
chartArea.AxisX.Title = "时间";
chartArea.AxisY.Title = "数值";
//设置图表区网格横纵线条的颜色
chartArea.AxisX.MajorGrid.LineColor = Color.FromArgb(64, 64, 64, 64);
chartArea.AxisY.MajorGrid.LineColor = Color.FromArgb(64, 64, 64, 64);
//设置图表区网格横纵线条的宽度
chartArea.AxisX.MajorGrid.LineWidth = 1;
chartArea.AxisY.MajorGrid.LineWidth = 1;
//设置坐标轴刻度线不延长出来
chartArea.AxisX.MajorTickMark.Enabled = false;
chartArea.AxisY.MajorTickMark.Enabled = false;
//开启下面两句能够隐藏网格线条
//chartArea.AxisX.MajorGrid.Enabled = false;
//chartArea.AxisY.MajorGrid.Enabled = false;
//设置X轴的显示类型及显示方式
chartArea.AxisX.Interval = 0; //设置为0表示由控件自动分配
chartArea.AxisX.IntervalAutoMode = IntervalAutoMode.VariableCount;
chartArea.AxisX.IntervalType = DateTimeIntervalType.Minutes;
chartArea.AxisX.LabelStyle.IsStaggered = true;
//chartArea.AxisX.MajorGrid.IntervalType = DateTimeIntervalType.Minutes;
//chartArea.AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Minutes;
chartArea.AxisX.LabelStyle.Format = "yyyy-MM-dd HH:mm:ss";
//设置文本角度
//chartArea.AxisX.LabelStyle.Angle = 45;
//设置文本自适应
chartArea.AxisX.IsLabelAutoFit = true;
//设置X轴允许拖动放大
chartArea.CursorX.IsUserEnabled = true;
chartArea.CursorX.IsUserSelectionEnabled = true;
chartArea.CursorX.Interval = 0;
chartArea.CursorX.IntervalOffset = 0;
chartArea.CursorX.IntervalType = DateTimeIntervalType.Minutes;
chartArea.AxisX.ScaleView.Zoomable = true;
chartArea.AxisX.ScrollBar.IsPositionedInside = false;

//设置中短线（还没看到效果）
//chartArea.AxisY.ScaleBreakStyle.Enabled = true;
//chartArea.AxisY.ScaleBreakStyle.CollapsibleSpaceThreshold = 47;
//chartArea.AxisY.ScaleBreakStyle.BreakLineStyle = BreakLineStyle.Wave;
//chartArea.AxisY.ScaleBreakStyle.Spacing = 2;
//chartArea.AxisY.ScaleBreakStyle.LineColor = Color.Red;
//chartArea.AxisY.ScaleBreakStyle.LineWidth = 10;

myChart.ChartAreas.Add(chartArea);
#endregion

//线条2：主要曲线
Series series = new Series("Default");
//设置线条类型
series.ChartType = SeriesChartType.Line;
//线条宽度
series.BorderWidth = 1;
//阴影宽度
series.ShadowOffset = 0;
//是否显示在图例集合Legends
series.IsVisibleInLegend = true;
//线条上数据点上是否有数据显示
series.IsValueShownAsLabel = true;
//线条颜色
series.Color = Color.MediumPurple;
//设置曲线X轴的显示类型
series.XValueType = ChartValueType.DateTime;
//设置数据点的类型
series.MarkerStyle = MarkerStyle.Circle;
//线条数据点的大小
series.MarkerSize = 5;
myChart.Series.Add(series);

//手动构造横坐标数据
DataTable dataTable = new DataTable();
dataTable.Columns.Add("TheTime",typeof(DateTime)); //注意typeof
dataTable.Columns.Add("TheValue", typeof(double)); //注意typeof
Random random = new Random(); //随机数
DateTime dateTime = System.DateTime.Now;
for (int n = 0; n < 3; n++)
{
dateTime = dateTime.AddSeconds(10);
DataRow dr = dataTable.NewRow();
dr["TheTime"] = dateTime;
dr["TheValue"] = random.Next(0, 101);
dataTable.Rows.Add(dr);
}
for (int n = 3; n < 1000; n++)
{
dateTime = dateTime.AddSeconds(30);
DataRow dr = dataTable.NewRow();
dr["TheTime"] = dateTime;
dr["TheValue"] = random.Next(0, 101);
dataTable.Rows.Add(dr);
}

//线条1：下限横线
Series seriesMin = new Series("Min");
seriesMin.ChartType = SeriesChartType.Line;
seriesMin.BorderWidth = 1;
seriesMin.ShadowOffset = 0;
seriesMin.IsVisibleInLegend = true;
seriesMin.IsValueShownAsLabel = false;
seriesMin.Color = Color.Red;
seriesMin.XValueType = ChartValueType.DateTime;
seriesMin.MarkerStyle = MarkerStyle.None;
myChart.Series.Add(seriesMin);

//线条3：上限横线
Series seriesMax = new Series("Max");
seriesMax.ChartType = SeriesChartType.Line;
seriesMax.BorderWidth = 1;
seriesMax.ShadowOffset = 0;
seriesMax.IsVisibleInLegend = true;
seriesMax.IsValueShownAsLabel = false;
seriesMax.Color = Color.Red;
seriesMax.XValueType = ChartValueType.DateTime;
seriesMax.MarkerStyle = MarkerStyle.None;
myChart.Series.Add(seriesMax);

//设置X轴的最小值为第一个点的X坐标值
chartArea.AxisX.Minimum = Convert.ToDateTime(dataTable.Rows[0]["TheTime"]).ToOADate();

//开始画线
foreach (DataRow dr in dataTable.Rows)
{
series.Points.AddXY(dr["TheTime"], dr["TheValue"]);

seriesMin.Points.AddXY(dr["TheTime"], 15); //设置下线为15
seriesMax.Points.AddXY(dr["TheTime"], 30); //设置上限为30
}
}

private void myChart_GetToolTipText(object sender, ToolTipEventArgs e)
{
if (e.HitTestResult.ChartElementType == ChartElementType.DataPoint)
{
int i = e.HitTestResult.PointIndex;
DataPoint dp = e.HitTestResult.Series.Points[i];
e.Text = string.Format("时间:{0}，数值:{1:F1} ", DateTime.FromOADate(dp.XValue), dp.YValues[0]);
}
}
}
}

using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Windows.Forms.DataVisualization.Charting;

using Hyet.Dal;

using Hxj.Model;

using Hxj.Data;

using System.Collections;

using Hyet.BLL;

namespace DigitalFactory.ReportForms

{

    public partial class ChartInfo : Form

    {

        public ChartInfo()

        {

            InitializeComponent();

            InitializeChart();

            this.myChart.GetToolTipText += new EventHandler<ToolTipEventArgs>(myChart_GetToolTipText);

        }

        private void InitializeChart()

        {

            myChart.ChartAreas.Clear();

            myChart.Series.Clear();

            #region 设置图表的属性

            //图表的背景色

            myChart.BackColor = Color.FromArgb(211, 223, 240);

            //图表背景色的渐变方式

            myChart.BackGradientStyle = GradientStyle.TopBottom;

            //图表的边框颜色、

            myChart.BorderlineColor = Color.FromArgb(26, 59, 105);

            //图表的边框线条样式

            myChart.BorderlineDashStyle = ChartDashStyle.Solid;

            //图表边框线条的宽度

            myChart.BorderlineWidth = 2;

            //图表边框的皮肤

            myChart.BorderSkin.SkinStyle = BorderSkinStyle.Emboss;

            #endregion

            #region 设置图表的标题

            Title title = new Title();

            //标题内容

            title.Text = "曲线图";

            //标题的字体

            title.Font = new System.Drawing.Font("Microsoft Sans Serif", 12, FontStyle.Bold);

            //标题字体颜色

            title.ForeColor = Color.FromArgb(26, 59, 105);

            //标题阴影颜色

            title.ShadowColor = Color.FromArgb(32, 0, 0, 0);

            //标题阴影偏移量

            title.ShadowOffset = 3;

            myChart.Titles.Add(title);

            #endregion

            #region 设置图例的属性

            //注意，需要把原来控件自带的图例删除掉

            this.myChart.Legends.Clear();

            Legend legend = new Legend("Default");

            legend.Alignment = StringAlignment.Center;

            legend.Docking = Docking.Bottom;

            legend.LegendStyle = LegendStyle.Column;

            this.myChart.Legends.Add(legend);

            // Add header separator of type line

            legend.HeaderSeparator = LegendSeparatorStyle.Line;

            legend.HeaderSeparatorColor = Color.Gray;

            LegendCellColumn firstColumn = new LegendCellColumn();

            firstColumn.ColumnType = LegendCellColumnType.SeriesSymbol;

            firstColumn.HeaderText = "Color";

            firstColumn.HeaderBackColor = Color.WhiteSmoke;

            myChart.Legends["Default"].CellColumns.Add(firstColumn);

            // Add Legend Text column

            LegendCellColumn secondColumn = new LegendCellColumn();

            secondColumn.ColumnType = LegendCellColumnType.Text;

            secondColumn.HeaderText = "Name";

            secondColumn.Text = "#LEGENDTEXT";

            secondColumn.HeaderBackColor = Color.WhiteSmoke;

            myChart.Legends["Default"].CellColumns.Add(secondColumn);

            // Add AVG cell column

            LegendCellColumn avgColumn = new LegendCellColumn();

            avgColumn.Text = "#AVG{N2}";

            avgColumn.HeaderText = "Avg";

            avgColumn.Name = "AvgColumn";

            avgColumn.HeaderBackColor = Color.WhiteSmoke;

            myChart.Legends["Default"].CellColumns.Add(avgColumn);

            // Add Total cell column

            LegendCellColumn totalColumn = new LegendCellColumn();

            totalColumn.Text = "#TOTAL{N1}";

            totalColumn.HeaderText = "Total";

            totalColumn.Name = "TotalColumn";

            totalColumn.HeaderBackColor = Color.WhiteSmoke;

            myChart.Legends["Default"].CellColumns.Add(totalColumn);

            // Set Min cell column attributes

            LegendCellColumn minColumn = new LegendCellColumn();

            minColumn.Text = "#MIN{N1}";

            minColumn.HeaderText = "Min";

            minColumn.Name = "MinColumn";

            minColumn.HeaderBackColor = Color.WhiteSmoke;

            myChart.Legends["Default"].CellColumns.Add(minColumn);

            // Set Max cell column attributes

            LegendCellColumn maxColumn = new LegendCellColumn();

            maxColumn.Text = "#MAX{N1}";

            maxColumn.HeaderText = "Max";

            maxColumn.Name = "MaxColumn";

            maxColumn.HeaderBackColor = Color.WhiteSmoke;

            myChart.Legends["Default"].CellColumns.Add(maxColumn);

            #endregion

            #region 设置图表区属性

            ChartArea chartArea = new ChartArea("Default");

            //设置Y轴刻度间隔大小

            chartArea.AxisY.Interval = 5;

            //设置Y轴的数据类型格式

            //chartArea.AxisY.LabelStyle.Format = "C";

            //设置背景色

            chartArea.BackColor = Color.FromArgb(64, 165, 191, 228);

            //设置背景渐变方式

            chartArea.BackGradientStyle = GradientStyle.TopBottom;

            //设置渐变和阴影的辅助背景色

            chartArea.BackSecondaryColor = Color.White;

            //设置边框颜色

            chartArea.BorderColor = Color.FromArgb(64, 64, 64, 64);

            //设置阴影颜色

            chartArea.ShadowColor = Color.Transparent;

            //设置X轴和Y轴线条的颜色

            chartArea.AxisX.LineColor = Color.FromArgb(64, 64, 64, 64);

            chartArea.AxisY.LineColor = Color.FromArgb(64, 64, 64, 64);

            //设置X轴和Y轴线条的宽度

            chartArea.AxisX.LineWidth = 1;

            chartArea.AxisY.LineWidth = 1;

            //设置X轴和Y轴的标题

            chartArea.AxisX.Title = "时间";

            chartArea.AxisY.Title = "数值";

            //设置图表区网格横纵线条的颜色

            chartArea.AxisX.MajorGrid.LineColor = Color.FromArgb(64, 64, 64, 64);

            chartArea.AxisY.MajorGrid.LineColor = Color.FromArgb(64, 64, 64, 64);

            //设置图表区网格横纵线条的宽度

            chartArea.AxisX.MajorGrid.LineWidth = 1;

            chartArea.AxisY.MajorGrid.LineWidth = 1;

            //设置坐标轴刻度线不延长出来

            chartArea.AxisX.MajorTickMark.Enabled = false;

            chartArea.AxisY.MajorTickMark.Enabled = false;

            //开启下面两句能够隐藏网格线条

            //chartArea.AxisX.MajorGrid.Enabled = false;

            //chartArea.AxisY.MajorGrid.Enabled = false;

            //设置X轴的显示类型及显示方式

            chartArea.AxisX.Interval = 0; //设置为0表示由控件自动分配

            chartArea.AxisX.IntervalAutoMode = IntervalAutoMode.VariableCount;

            chartArea.AxisX.IntervalType = DateTimeIntervalType.Minutes;

            chartArea.AxisX.LabelStyle.IsStaggered = true;

            //chartArea.AxisX.MajorGrid.IntervalType = DateTimeIntervalType.Minutes;

            //chartArea.AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Minutes;

            chartArea.AxisX.LabelStyle.Format = "yyyy-MM-dd HH:mm:ss";

            //设置文本角度

            //chartArea.AxisX.LabelStyle.Angle = 45;

            //设置文本自适应

            chartArea.AxisX.IsLabelAutoFit = true;

            //设置X轴允许拖动放大

            chartArea.CursorX.IsUserEnabled = true;

            chartArea.CursorX.IsUserSelectionEnabled = true;

            chartArea.CursorX.Interval = 0;

            chartArea.CursorX.IntervalOffset = 0;

            chartArea.CursorX.IntervalType = DateTimeIntervalType.Minutes;

            chartArea.AxisX.ScaleView.Zoomable = true;

            chartArea.AxisX.ScrollBar.IsPositionedInside = false;

            //设置中短线（还没看到效果）

            //chartArea.AxisY.ScaleBreakStyle.Enabled = true;

            //chartArea.AxisY.ScaleBreakStyle.CollapsibleSpaceThreshold = 47;

            //chartArea.AxisY.ScaleBreakStyle.BreakLineStyle = BreakLineStyle.Wave;

            //chartArea.AxisY.ScaleBreakStyle.Spacing = 2;

            //chartArea.AxisY.ScaleBreakStyle.LineColor = Color.Red;

            //chartArea.AxisY.ScaleBreakStyle.LineWidth = 10;

            myChart.ChartAreas.Add(chartArea);

            #endregion

            //线条2：主要曲线

            Series series = new Series("Default");

            //设置线条类型

            series.ChartType = SeriesChartType.Line;

            //线条宽度

            series.BorderWidth = 1;

            //阴影宽度

            series.ShadowOffset = 0;

            //是否显示在图例集合Legends

            series.IsVisibleInLegend = true;

            //线条上数据点上是否有数据显示

            series.IsValueShownAsLabel = true;

            //线条颜色

            series.Color = Color.MediumPurple;

            //设置曲线X轴的显示类型

            series.XValueType = ChartValueType.DateTime;

            //设置数据点的类型

            series.MarkerStyle = MarkerStyle.Circle;

            //线条数据点的大小

            series.MarkerSize = 5;

            myChart.Series.Add(series);

            //手动构造横坐标数据

            DataTable dataTable = new DataTable();

            dataTable.Columns.Add("TheTime",typeof(DateTime)); //注意typeof

            dataTable.Columns.Add("TheValue", typeof(double)); //注意typeof

            Random random = new Random(); //随机数

            DateTime dateTime = System.DateTime.Now;

            for (int n = 0; n < 3; n++)

            {

                dateTime = dateTime.AddSeconds(10);

                DataRow dr = dataTable.NewRow();

                dr["TheTime"] = dateTime;

                dr["TheValue"] = random.Next(0, 101);

                dataTable.Rows.Add(dr);

            }

            for (int n = 3; n < 1000; n++)

            {

                dateTime = dateTime.AddSeconds(30);

                DataRow dr = dataTable.NewRow();

                dr["TheTime"] = dateTime;

                dr["TheValue"] = random.Next(0, 101);

                dataTable.Rows.Add(dr);

            }

            //线条1：下限横线

            Series seriesMin = new Series("Min");

            seriesMin.ChartType = SeriesChartType.Line;

            seriesMin.BorderWidth = 1;

            seriesMin.ShadowOffset = 0;

            seriesMin.IsVisibleInLegend = true;

            seriesMin.IsValueShownAsLabel = false;

            seriesMin.Color = Color.Red;

            seriesMin.XValueType = ChartValueType.DateTime;

            seriesMin.MarkerStyle = MarkerStyle.None;

            myChart.Series.Add(seriesMin);

            //线条3：上限横线

            Series seriesMax = new Series("Max");

            seriesMax.ChartType = SeriesChartType.Line;

            seriesMax.BorderWidth = 1;

            seriesMax.ShadowOffset = 0;

            seriesMax.IsVisibleInLegend = true;

            seriesMax.IsValueShownAsLabel = false;

            seriesMax.Color = Color.Red;

            seriesMax.XValueType = ChartValueType.DateTime;

            seriesMax.MarkerStyle = MarkerStyle.None;

            myChart.Series.Add(seriesMax);

            //设置X轴的最小值为第一个点的X坐标值

            chartArea.AxisX.Minimum = Convert.ToDateTime(dataTable.Rows[0]["TheTime"]).ToOADate();

            //开始画线

            foreach (DataRow dr in dataTable.Rows)

            {

                series.Points.AddXY(dr["TheTime"], dr["TheValue"]);

                seriesMin.Points.AddXY(dr["TheTime"], 15); //设置下线为15

                seriesMax.Points.AddXY(dr["TheTime"], 30); //设置上限为30

            }

        }

        private void myChart_GetToolTipText(object sender, ToolTipEventArgs e)

        {

            if (e.HitTestResult.ChartElementType == ChartElementType.DataPoint)

            {

                int i = e.HitTestResult.PointIndex;

                DataPoint dp = e.HitTestResult.Series.Points[i];

                e.Text = string.Format("时间:{0}，数值:{1:F1} ", DateTime.FromOADate(dp.XValue), dp.YValues[0]);

            }

        }

    }

}

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