It is by design that chart web part cannot connect to a data view web part, it only connects to the web part using IWebPartTable interface (such as XSLTListViewWebPart).
So please use ListView web part in the page to use as the data provider for your chart.
原文地址:http://social.msdn.microsoft.com/Forums/ar-SA/sharepoint2010general/thread/dfde31ca-5830-4194-b590-7c64fdda7251