Microsoft Chart Controls for ASP.NET and Windows Forms
Now Microsoft Chart controls Add-on for Microsoft Visual Studio 2008 can be used for charting needs.
Prerequisite: Microsoft Visual Studio 2008 SP1 and Microsoft Chart Controls for Microsoft .NET Framework 3.5.
For sample Environment for Microsoft Chart Controls check here. The sample environment contains over 200 samples for both ASP.NET and Windows Forms.
See the following related links:
There are lots of third party Chart Controls available for ASP.NET as well, please check here.