实例演示C#利用dotnetcharting控件生成柱状图

由于项目需要画统计图，经讨论，我们选用了dotnetcharting这个控件。dotnetcharting是一款非常棒的生成统计图表的控件，开发人员只需要参考范例，掌握思路，就能够自己自由的编写代码，实现各种各样的统计效果图。正版dotnetcharting是需要购买的，价格目前官方网站上显示是$395，相当的昂贵哦。不过中国人很聪明，现在到处可以下载破解版了。dotnetcharting目前已经支持.net Framework 2.0, 3.0, and 3.5了，有c#和vb.net版本。相当的不错！

下面是几个截图，看看效果如何？

(图1) 2D柱状图

(图2) 3D饼状图

(图3) 股票走势图

dotnetcharting还能作出各种各样的图表出来，在此就不一一罗列了。现附上(图1)的代码：

<%@ Page Language="C#" Description="dotnetCHARTING Component"%>
<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%>
<%@ Import Namespace="System.Drawing" %>

SeriesCollection getRandomData()
{
SeriesCollection SC = new SeriesCollection();
Random myR = new Random();
for(int a = 0; a < 4; a++)
{
  Series s = new Series();
  s.Name = "Series " + a;
  for(int b = 0; b < 5; b++)
  {
   Element e = new Element();
   e.Name = "E " + b;
   e.YValue = myR.Next(50);
   s.Elements.Add(e);
  }
  SC.Add(s);
}

// Set Different Colors for our Series
SC[0].DefaultElement.Color = Color.FromArgb(49,255,49);
SC[1].DefaultElement.Color = Color.FromArgb(255,255,0);
SC[2].DefaultElement.Color = Color.FromArgb(255,99,49);
SC[3].DefaultElement.Color = Color.FromArgb(0,156,255);
return SC;
}

void Page_Load(Object sender,EventArgs e)
{
// Set the title.
Chart.Title="My Chart";

// Set the x axis label
Chart.ChartArea.XAxis.Label.Text="X Axis Label";

// Set the y axis label
Chart.ChartArea.YAxis.Label.Text="Y Axis Label";

// Set the directory where the images will be stored.
Chart.TempDirectory="temp";

// Set the bar shading effect
Chart.ShadingEffect = true;

// Set he chart size.
Chart.Width = 600;
Chart.Height = 350;

// Add the random data.
Chart.SeriesCollection.Add(getRandomData());

}
</script>
<HTML><HEAD><TITLE>Gallery Sample</TITLE></HEAD>
<BODY>
<DIV align=center>
<dotnet:Chart id="Chart" runat="server"/>
</DIV>
</BODY>
</BODY>
</HTML>

vb.net

<%@ Page Language="VB" Description="dotnetCHARTING Component"%>
<%@ Register TagPrefix="dotnet" Namespace="dotnetCHARTING" Assembly="dotnetCHARTING"%>
<%@ Import Namespace="System.Drawing" %>

Function getRandomData() As SeriesCollection

   Dim SC As New SeriesCollection()
   Dim myR As New Random()
   Dim a As Integer
   For a = 0 To 3
      Dim s As New Series()
      s.Name = "Series " & a
      Dim b As Integer
      For b = 0 To 4
         Dim e As New Element()
         e.Name = "E " & b
         e.YValue = myR.Next(50)
         s.Elements.Add(e)
      Next b
      SC.Add(s)
   Next a


   SC(0).DefaultElement.Color = Color.FromArgb(49, 255, 49)
   SC(1).DefaultElement.Color = Color.FromArgb(255, 255, 0)
   SC(2).DefaultElement.Color = Color.FromArgb(255, 99, 49)
   SC(3).DefaultElement.Color = Color.FromArgb(0, 156, 255)
   Return SC
End Function 'getRandomData

Sub Page_Load(sender As [Object], e As EventArgs)
   ' Set the title.
   Chart.Title = "My Chart"


   ' Set the x axis label
   Chart.ChartArea.XAxis.Label.Text = "X Axis Label"

   ' Set the y axis label
   Chart.ChartArea.YAxis.Label.Text = "Y Axis Label"

   ' Set the directory where the images will be stored.
   Chart.TempDirectory = "temp"

   ' Set the bar shading effect
   Chart.ShadingEffect = True

   ' Set he chart size.
   Chart.Size = "600x350"

   ' Add the random data.
   Chart.SeriesCollection.Add(getRandomData())
End Sub 'Page_Load

</script>
<HTML><HEAD><TITLE>Gallery Sample</TITLE></HEAD>
<BODY>
<DIV align=center>
<dotnet:Chart id="Chart" runat="server"/>
</DIV>
</BODY>
</BODY>
</HTML>

破解版下载地址：http://files.cnblogs.com/dreamof/dotnetcharting.rar

使用手册可从官方网下载(E文)：http://www.dotnetcharting.com