WPF doesn't have a Crystal report Viewer control at this point. You need to host the Windows Forms Crystal report viewer control in WPF.
Please follow this link for hosting Windows Forms Control in WPF: http://msdn.microsoft.com/en-us/library/ms751797.aspx#Windows_Presentation_Foundation_Application_Hosting
you can download the latest version of CR from herehttp://www.businessobjects.com/jump/xi/crvs2010/default.asp
it have WPF support. for crystal report viewer for WPF referance this assembly after installing CR 2010
Hope this helps.
Program Files\SAP BusinessObjects\Crystal Reports for .NET Framework 4.0\Common\SAP BusinessObjects Enterprise XI 4.0\win32_x86\dotnet\SAPBusinessObjects.WPF.Viewer.dll