从0自学C#08--绘制曲线chart控件

chart控件的使用

本文介绍如何使用工具箱里的chart控件，绘制多条曲线。效果图如下：



1.InitializeChart

在窗体里添加chart控件，然后在属性里清空ChartAreas、Legends和Series集合，它们会由下面代码动态实现。在窗体构造函数里，实现InitializeChart和DrawSeries方法。

InitializeChart代码如下。

public partial class MainFormBERT : Form
{
public MainFormBERT()
{
InitializeComponent();
InitializeChart();
DrawSeries();
}

public void InitializeChart()
{
#region 设置图表的属性
//图表的背景色
chart1.BackColor = Color.FromArgb(211, 223, 240);
//图表背景色的渐变方式
chart1.BackGradientStyle = GradientStyle.None;
//图表的边框颜色、
chart1.BorderlineColor = Color.FromArgb(26, 59, 105);
//图表的边框线条样式
chart1.BorderlineDashStyle = ChartDashStyle.Solid;
//图表边框线条的宽度
chart1.BorderlineWidth = 2;
//图表边框的皮肤
chart1.BorderSkin.SkinStyle = BorderSkinStyle.None;
#endregion

#region 设置图表的Title
Title title = new Title();
//标题内容
title.Text = "BER";
//标题的字体
title.Font = new System.Drawing.Font("Microsoft Sans Serif", 12, FontStyle.Regular);
//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;

chart1.Titles.Add(title);
#endregion

#region 设置图表区属性
//图表区的名字
ChartArea chartArea = new ChartArea("Default");
//背景色
chartArea.BackColor = Color.White;// Color.FromArgb(64, 165, 191, 228);
//背景渐变方式
chartArea.BackGradientStyle = GradientStyle.None;
//渐变和阴影的辅助背景色
chartArea.BackSecondaryColor = Color.White;
//边框颜色
chartArea.BorderColor = Color.Blue;
//边框线条宽度
chartArea.BorderWidth = 2;
//边框线条样式
chartArea.BorderDashStyle = ChartDashStyle.Solid;
//阴影颜色
//chartArea.ShadowColor = Color.Transparent;

//设置X轴和Y轴线条的颜色和宽度
chartArea.AxisX.LineColor = Color.FromArgb(64, 64, 64, 64);
chartArea.AxisX.LineWidth = 1;
chartArea.AxisY.LineColor = Color.FromArgb(64, 64, 64, 64);
chartArea.AxisY.LineWidth = 1;

//设置X轴和Y轴的标题
//chartArea.AxisX.Title = "time";
//chartArea.AxisY.Title = "count";
//chartArea.AxisX.TitleFont = new System.Drawing.Font("Microsoft Sans Serif", 10, FontStyle.Regular);
//chartArea.AxisY.TitleFont = new System.Drawing.Font("Microsoft Sans Serif", 10, FontStyle.Regular);

//设置图表区网格横纵线条的颜色和宽度
chartArea.AxisX.MajorGrid.LineColor = Color.FromArgb(64, 64, 64, 64);
chartArea.AxisX.MajorGrid.LineWidth = 1;
chartArea.AxisY.MajorGrid.LineColor = Color.FromArgb(64, 64, 64, 64);
chartArea.AxisY.MajorGrid.LineWidth = 1;

chart1.ChartAreas.Add(chartArea);
#endregion

#region 图例及图例的位置
Legend legend = new Legend();
legend.Alignment = StringAlignment.Center;
legend.Docking = Docking.Bottom;
legend.BackColor = Color.Transparent;

this.chart1.Legends.Add(legend);
#endregion
}
}

2.设置曲线样式

类型、颜色和宽度等。

private Series SetSeriesStyle(int i)
{
Series series = new Series(string.Format("Ch{0}", i + 1));

//Series的类型
series.ChartType = SeriesChartType.Line;
//Series的边框颜色
series.BorderColor = Color.FromArgb(180, 26, 59, 105);
//线条宽度
series.BorderWidth = 3;
//线条阴影颜色
//series.ShadowColor = Color.Black;
//阴影宽度
//series.ShadowOffset = 2;
//是否显示数据说明
series.IsVisibleInLegend = true;
//线条上数据点上是否有数据显示
series.IsValueShownAsLabel = false;
//线条上的数据点标志类型
series.MarkerStyle = MarkerStyle.None;
//线条数据点的大小
//series.MarkerSize = 8;
//线条颜色
switch (i)
{
case 0:
series.Color = Color.FromArgb(220, 65, 140, 240);
break;
case 1:
series.Color = Color.FromArgb(220, 224, 64, 10);
break;
case 2:
series.Color = Color.FromArgb(220, 120, 150, 20);
break;
case 3:
series.Color = Color.FromArgb(220, 12, 128, 232);
break;
}
return series;
}

3.绘制曲线

从datatable里获取数据，绘制四条曲线。

//绘制曲线
private void DrawSeries()
{
dt = new TestDataTable();
dt.CreateTable();

for (int i = 0; i < 4; i++)
{
Series series = this.SetSeriesStyle(i);
DataRow[] foundRows;
string expression = "Ch = " + i;
foundRows = dt.Select(expression);
foreach (DataRow row in foundRows)
{
series.Points.AddXY(row[0], row[2]);
}
this.chart1.Series.Add(series);
}
}

4.显示或隐藏曲线

根据checkbox的状态显示和隐藏这四条曲线。

//显示隐藏曲线
private void DisOrPlaySeries(int i)
{
if (checkBox[i].Checked)
{
DataRow[] foundRows;
string expression = "Ch = " + i;
foundRows = dt.Select(expression);
foreach (DataRow row in foundRows)
{
this.chart1.Series[i].Points.AddXY(row[0], row[2]);
}
}
else
{
this.chart1.Series[i].Points.Clear();
}
}