After having developed a rather large reporting app using WinForms ReportViewer in local mode, I find that I had more than 60.000 temp files left by ReportViewer for a total size of 7GB!
Has anyone else had this problem? The files are located in IsolatedStorage:
The full path can look something like this:
C:\Documents and Settings\UserName\Local Settings\Application Data\IsolatedStorage\wry123m4.5hi\q0dqptc1.nh0\Url.hyiun4sixkjhw2nkg5z2jxnfmdboorji\StrongName.kkilopnkw2qwdkdtkd1n5unpps1wrw2m\Files
The files themselves have file names like ReportPageTempFile-GUID:
ReportPageTempFile-12325f03-9912-452c-90e4-18671f37315b
It seems that one temp file is created for each page in a report, and is not erased when the application exits.
UPDATE: These files are generated in Print Preview mode. I use this mode as the default mode, cause it looks nice. The problem persists though. I tried to file a bug on the product feedback page but the site isn't working.