Unable to add selected web part

By peter.stilgoe

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Unable to add selected web part(s)

QueryListPart: A Web Part or Web Form Control on this page cannot be displayed or imported. The type could not be found or it is not registered as safe.

- Make sure the webpart is registered as safe in the web.config

- Make sure the assembly is accessible and in the bin folder

- Make sure the assembly name in the *.webpart definition file, matches the assembly name in the safe control element in web.config

- Make sure you don’t have more than one *.webpart file for the same web part in the web part catalog. This may happen if you changed the name of the *.webpart file.

- Restart IIS to start clean. Attach the debugger to the w3wp.exe process and try to load the page with the rogue web part. This way you can determine the exact location of the assembly you are loading.

- Check if the web part class exists by opening the assembly with reflector. This might sound funny, but in a bigger team, when different versions of assemblies are flying around it is very easy to overlook something and to use the wrong version, which so happens does not contain the web part class at all.

Thanks to http://www.mikhaildikov.com/

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May 21st, 2010

About... peter.stilgoe

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Sharepoint, InfoPath, K2, Nintex, Business Process Mapping, Business Intelligence, Automation, ECM, Document Management, Document Imaging, Internet Marketing & Online Business Consultant Email / MSN: pstilgoe@hotmail.com LinkedIn: Pete Stilgoe - Sharepoint Consultant