User-734925760 posted
Hi,
So far as I know, as we run ReportViewer.exe, Microsoft.ReportViewer.WebForms.dll will be installed in the Global Assembly Cache folder on the deployment computer. So you need to download Report Viewer 2012.
For more information about download report viewer, please refer to the link below:
http://www.microsoft.com/en-gb/download/details.aspx?id=27230
For more information about runing ReportViewer.exe, please refer to the link below:
http://msdn.microsoft.com/en-us/library/ms251723.aspx
Hope it's useful for you.
Best Regards,
Michelle Ge