Checklist: Cannot import webpart

By Ankit · 2007-09-16 · MOSS 2007, Microsoft

While importing (drag/drop) your webpart to any SharePoint page, if you receive an error stating “Cannot import webpart” or “unable to add selected web part(s)”! here is the check list you should look for:

Make sure the webpart class is inherited either from Microsoft.SharePoint.WebPartPages.WebPart or System.Web.UI.WebControls.WebParts.WebPart
The webpart class needs to be declared public.
Safe controls entry in web.config file.
If you are referring a webpart from GAC (i.e. assembly containing webpart class is placed in GAC) make sure the GAC version is the latest build and IIS is re-started.

- Ankit

Tags: error, sharepoint, solution, webpart

5 comments

Shoaib Adil 2008-12-04

i've tried n checked all of it but the error is still coming :(

Wail Makhoul 2010-01-11

Genuis! Inheriting from Microsoft.Sharepoint.WebpartPages.WebPart did it for me. There are obviously other things that you could do to fix the error like checking web.config file for a safecontrol entry...etc, but definitely put me the right direction as I was inheriting from System.Web.WebControls initially.

Carol 2010-02-20

Hi After declaring the Web Part class as Public, it worked for me!! Thanks for your solution. Thanks Carol

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Pepper 2012-10-08

This is a most useful contribuiton to the debate