静态图表显示（曲线图） - (第三十七讲)
视频讲解如下：
源码下载，提取码：z6wo
https://pan.baidu.com/s/17cQirLg2xHgtHHMgNhOOXA
这里给大家演示WinForm环境下如何使用chart控件进行曲线图的静态显示。
目前先整个曲线图的，其他的图表，以后再补充。
效果如下
实现代码如下：
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;
namespace WindowsFormsApp
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
/// <summary>
/// 初始化图表
/// </summary>
/// <param name="maxY">Y轴最大刻度</param>
/// <param name="minY">Y轴最小刻度</param>
/// <param name="Interval">X轴间隔</param>
/// <param name="Type">Y轴数据类型</param>
/// <param name="name">表名</param>
private void InitChart(decimal maxY, decimal minY, double Interval, ChartValueType Type, string name)
{
#region Series 数据初始化
this.chart1.Series.Clear();
Series series = new Series(name);
series.ChartArea = "C1";
series.Points.Clear();
series.Color = Color.Red;
series.XValueType = ChartValueType.Time; // 这个数据类型一定要和实际的保持一致，否则小弹窗也不会提示
series.YValueType = Type;
series.BorderWidth = 1;
series.MarkerColor = Color.Green;
series.MarkerSize = 7;
series.MarkerStyle = checkBox1.Checked ? MarkerStyle.Circle : MarkerStyle.None;
series.ChartType = SeriesChartType.Line; // Line折线图 Spline 曲线图
series.IsValueShownAsLabel = true;
this.chart1.Series.Add(series);
// 这个一定要放在Add的后面，否则不会显示提示
this.chart1.Series[0].ToolTip = "时间：#VALX\n当前值：#VALY\n最大值：#MAX\n最小值：#MIN\n平均值：#AVG";
#endregion
#region chartArea 数据初始化
// 计算极限数据
if (minY == maxY) { minY -= 10; maxY += 10; }
double min = (double)(minY - ((maxY - minY) * (decimal)0.2));
double max = (double)(maxY + ((maxY - minY) * (decimal)0.2));
//定义图表区域、设置图表显示样式
this.chart1.ChartAreas.Clear();
ChartArea chartArea = new ChartArea("C1");
// 允许X、Y轴放大
chartArea.CursorX.IsUserEnabled = true;
chartArea.CursorX.IsUserSelectionEnabled = true;
chartArea.CursorX.Interval = 1D;
chartArea.CursorX.IntervalOffsetType = DateTimeIntervalType.Minutes;
chartArea.CursorX.LineColor = Color.Blue;
chartArea.CursorY.IsUserEnabled = true;
chartArea.CursorY.AutoScroll = true;
chartArea.CursorY.IsUserSelectionEnabled = true;
chartArea.CursorY.Interval = 0D;
chartArea.CursorY.IntervalOffsetType = DateTimeIntervalType.Minutes;
chartArea.CursorY.LineColor = Color.Blue;
chartArea.AxisX.Interval = Interval; // 设置轴的间隔
chartArea.AxisX.IsInterlaced = true;
chartArea.AxisX.IsStartedFromZero = false;
chartArea.AxisX.MajorGrid.LineColor = Color.Silver;
chartArea.AxisX.MajorGrid.Enabled = true;
chartArea.AxisX.ScrollBar.Enabled = true;
chartArea.AxisX.IntervalAutoMode = IntervalAutoMode.FixedCount;
chartArea.AxisX.IntervalType = DateTimeIntervalType.NotSet;
chartArea.AxisX.ScrollBar.ButtonStyle = ScrollBarButtonStyles.All;//启用X轴滚动条按钮
chartArea.AxisX.ScaleView.Scroll(ScrollType.Last);
chartArea.AxisX.LabelStyle.Format = "HH:mm:ss"; // 设置时间作为X轴
chartArea.AxisX.LabelStyle.IntervalType = DateTimeIntervalType.Minutes;
chartArea.AxisX.LabelStyle.Interval = 1; //坐标值间隔1S
chartArea.AxisX.LabelStyle.IsEndLabelVisible = false; //防止X轴坐标跳跃
chartArea.AxisX.MajorGrid.IntervalType = DateTimeIntervalType.Minutes;
chartArea.AxisX.MajorGrid.Interval = 1; //网格间隔
//设置图表显示样式
chartArea.AxisY.Minimum = min; // Y轴最小值
chartArea.AxisY.Maximum = max; // Y轴最大值
chartArea.AxisY.IsStartedFromZero = false;
chartArea.AxisY.MajorGrid.Enabled = true;
// 背景样式
//chartArea.BackColor = Color.Red; //背景色
//chartArea.BackSecondaryColor = Color.White; //渐变背景色
//chartArea.BackGradientStyle = GradientStyle.TopBottom; //渐变方式
//chartArea.BackHatchStyle = ChartHatchStyle.None; //背景阴影
//chartArea.BorderDashStyle = ChartDashStyle.NotSet; //边框线样式
//chartArea.BorderWidth = 1; //边框宽度
//chartArea.BorderColor = Color.Black;
this.chart1.ChartAreas.Add(chartArea);
chartArea.AxisX.LabelStyle.Angle = -90;
chartArea.AxisX.LabelStyle.Font = new Font("微软雅黑", 10f);
#endregion
// 设置标题
this.chart1.Titles.Clear();
this.chart1.Titles.Add("n1");
this.chart1.Titles[0].Text = name;
this.chart1.Titles[0].ForeColor = Color.RoyalBlue;
this.chart1.Titles[0].Font = new System.Drawing.Font("Microsoft Sans Serif", 12F);
// 设置边框
this.chart1.BackGradientStyle = GradientStyle.TopBottom;
this.chart1.BorderlineColor = Color.FromArgb(26, 59, 105);
this.chart1.BorderlineDashStyle = ChartDashStyle.Solid;
this.chart1.BorderlineWidth = 1;
this.chart1.BorderSkin.SkinStyle = BorderSkinStyle.Emboss;
}
private void button1_Click(object sender, EventArgs e)
{
List<datas> tables = new List<datas>();
// 这个用于生成随机数
Random rd = new Random();
// 生成数据
for (int i = 0; i < 50; i++)
{
// 生成数据，X轴是以分钟为单位分割的，所以这里累加的是分钟数
tables.Add(new datas() { datax = DateTime.Now.AddMinutes(i), datay = rd.Next(1, 100) });
}
// X轴刻度间隔
double Interval = (double)numericUpDown1.Value;
// 提取最大值，控制Y轴最大刻度
double max = tables.Max(x => x.datay);
// 提取最小值，控制Y轴最小刻度
double min = tables.Min(x => x.datay);
InitChart((decimal)max, (decimal)min, Interval, ChartValueType.Double, "测试数据 共" + tables.Count.ToString() + "条数据");
this.chart1.DataSource = tables;
// X轴数据源
this.chart1.Series[0].XValueMember = "datax";
// Y轴数据源
this.chart1.Series[0].YValueMembers = "datay";
this.chart1.DataBind();
}
}
public class datas
{
/// <summary>
/// X轴数据
/// </summary>
public DateTime datax { get; set; }
/// <summary>
/// Y轴数据
/// </summary>
public double datay { get; set; }
}
}
