chart控件(曲线图)示例源码

using System;using System.Collections.Generic;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;//这是后来需要引用的命名空间，图表可视化的类型using System.Windows.Forms.DataVisualization.Charting;namespace Draw{ public class DrawChart1 { //包含六个参数（默认有Chart控件的占位，直接在窗体中调整好大小然后要先在属性框中将ChartArea、Series、Legend移除） //1、ChartArea：背景色 //2、Series：数据线的颜色 //3、Series：数据点的颜色 //4、Series：数据点的样式（圆形、三角形等） //5、Y轴的具体内容（不考虑图例，比较占位置，显示出来不友好） //6、数据表：这个是画图所必须的数据参数，可以将数据库中的数据转变成数据表的形式之后传入 public static bool showInChart(Chart chart, Color[] bg_chartArea, Color[] series_color, Color[] series_markColor, MarkerStyle[] series_markstyle, string[] axisY_title, DataTable dt) { ChartArea[] chartArea = new ChartArea[dt.Columns.Count - 1]; Series[] series = new Series[dt.Columns.Count - 1]; chart.DataSource = dt; //Windows窗体计时器，每半分钟刷新一次数值 System.Windows.Forms.Timer t = new System.Windows.Forms.Timer(); t.Enabled = true; t.Interval = 1000; t.Tick = T_Tick; t.Start(); void T_Tick(object sender, EventArgs e) { //chart.Series["series1"].Points.Clear(); //chart.Series["series2"].Points.Clear(); //bindingSeries(); } for (int i = 0; i<dt.Columns.Count - 1; i ) { chartArea[i] = new ChartArea(); //chart.ChartAreas.Add(chartArea[i]); createChart(chart, chartArea[i]); chartArea[i].Name = "area" i; chartArea[i].BackColor = bg_chartArea[i];//绘图区域的背景色 chartArea[i].AxisY.Title = axisY_title[i]; series[i] = new Series(); series[i].ChartArea = "area" i; initSeries(chart, series[i]); series[i].Color = series_color[i]; series[i].MarkerColor = series_markColor[i]; series[i].MarkerStyle = series_markstyle[i]; series[i].XValueMember = dt.Columns[0].ColumnName;//设置第一条曲线的"xValue"的值 series[i].YValueMembers = dt.Columns[i 1].ColumnName;//设置第一条曲线的"yValue"的值 } return true; }///以下为内部函数private static Chart createChart(Chart chart, ChartArea chartArea){ chart.Anchor = AnchorStyles.Bottom | AnchorStyles.Right | AnchorStyles.Top | AnchorStyles.Left;//随着窗体放大与缩小 //======================================================================== // chartArea：绘图区 chart.ChartAreas.Add(chartArea); //======================================================================== //Cursor：only apply the top area，主要是针对第一层的ChartArea chartArea.CursorX.IsUserEnabled = true;//启用了X游标 chartArea.CursorX.Interval = 1;//X游标之间偏移的间隔大小 chartArea.CursorX.LineWidth = 1;//X游标的线条宽度 chartArea.CursorX.LineDashStyle = ChartDashStyle.Dash;//X光标的线条样式 chartArea.CursorX.IsUserSelectionEnabled = true;//能否用X游标选择区域 chartArea.CursorX.SelectionColor = Color.Yellow;//X游标选中区域的颜色 chartArea.CursorX.AutoScroll = true;//选择区域超出图表区域边界时，发生滚动 chartArea.CursorY.IsUserEnabled = true; chartArea.CursorY.Interval = 1; chartArea.CursorY.LineWidth = 1; chartArea.CursorY.LineDashStyle = ChartDashStyle.Dash; chartArea.CursorY.IsUserSelectionEnabled = true; chartArea.CursorY.SelectionColor = Color.Yellow; chartArea.CursorY.AutoScroll = true; //======================================================================== // Axis轴的有关属性 chartArea.AxisX.Enabled = AxisEnabled.True;//确定启用X轴 chartArea.AxisX.Title = "时间";//X轴的标题 chartArea.AxisX.IsLabelAutoFit = true;//自动调整轴标签的标志 chartArea.AxisX.LabelStyle.IsEndLabelVisible = true;//在轴的末尾显示标签 chartArea.AxisX.MajorGrid.Enabled = false;//x axis主要网格线样式不启用 chartArea.AxisY.MajorGrid.Enabled = false;//y axis主要网格线样式不启用 chartArea.AxisX.LabelStyle.Format = "hh:mm:ss"; chartArea.AxisX.Interval = 0.1;//轴的间隔可以自行设置，根据最小最大值设置相应的间隔 chartArea.AxisX.IntervalAutoMode = IntervalAutoMode.VariableCount;//始终在轴上创建灵活的间隔数 chartArea.AxisX.IntervalType = DateTimeIntervalType.Seconds;//指定间隔类型 chartArea.AxisY.Enabled = AxisEnabled.True; return chart;}private static Series initSeries(Chart chart, Series series){ chart.Series.Add(series);//将series1加进Chart中 //Series1 style series.ChartType = SeriesChartType.Spline; // type //这一句很关键 series.IsXValueIndexed = true;//指示数据点索引是否用于x值 series.XValueType = ChartValueType.DateTime;//x axis type series.YValueType = ChartValueType.Single;//y axis type series.YValuesPerPoint = 1; //Marker series.MarkerSize = 4; series.ToolTip = "时间:#VALX 值#VALY"; //Label series.IsValueShownAsLabel = true; series.SmartLabelStyle.Enabled = false; series.SmartLabelStyle.AllowOutsidePlotArea = LabelOutsidePlotAreaStyle.Yes; series.LabelForeColor = Color.Gray; return series;} }}