微软提供的免费.net图表组件

介绍

http://weblogs.asp.net/scottgu/archive/2008/11/24/new-asp-net-charting-control-lt-asp-chart-runat-quot-server-quot-gt.aspx

官方例子下载

http://code.msdn.microsoft.com/mschart/Release/ProjectReleases.aspx?ReleaseId=1591