We've had to make a breaking change to XtraCharts in ASP.NET in a
minor release of DXperience due to an issue with the form designer in
Visual Studio 2008 (I originally pointed this out here). Here's the long and the short of it, albeit in
reverse order.
The short: in the next minor version of DXperience, the
WebChartControl has been moved to the DevExpress.XtraCharts.Web
namespace.
The long: when we started testing our products in the released version
of Visual Studio 2008 we found a problem with our ASP.NET
WebChartControl. When you add a custom web control from the toolbox
onto the form, under certain conditions the new IDE will create an
incorrect tag prefix. This causes several cascading issues, all bad.
After lots of back and forth discussing various options, the
development team came to the conclusion that there's nothing for it
but to introduce a breaking change. (One proposal involved doing
nothing, waiting for Microsoft to issue a fix to Visual Studio that
repairs the issue. That, as I'm sure you can appreciate, is just as
bad if not worse as introducing a breaking change.)
So, we've moved all our ASP.NET-specific classes to a separate
namespace; all classes that are in the DevExpress.XtraCharts.Web
assembly have been moved from the DevExpress.XtraCharts namespace to
the DevExpress.XtraCharts.Web namespace. Unfortunately, this is a
global change and will affect all developers, whether they're using
Visual Studio 2008 or not.
The Project Converter tool that we ship can apply the required change
to all *.aspx, *.ascx, *.master and *.skin files. Please note though
that it doesn't fix *.cs and *.vb files, which means that you will
need to manually add the DevExpress.XtraCharts.Web namespace to those
source files where it's needed.
Note that WinForms programs are not affected.