mv ark replied to myzonal.com myzonal.com on 04-Feb-10 11:24 PM
Using the Google Chart API is an easy & component-free way to generate a Pie chart
The Google Chart API supports 9 types of charts including Pie - http://code.google.com/apis/chart/
The other free charting tools that you can use are
Microsoft Chart controls for .NET Framework 3.5 - http://weblogs.asp.net/scottgu/archive/2008/11/24/new-asp-net-charting-control-lt-asp-chart-runat-quot-server-quot-gt.aspx
WebChart - http://www.carlosag.net/Tools/WebChart/Default.aspx
NPlot - http://netcontrols.org/nplot/wiki/
Source: http://mvark.blogspot.com/2009/05/how-to-generate-heat-map-with-google.html