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Editorial Team
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Asked: 2026-05-28T00:30:43+00:00

I am working on visual web parts. I created a sharepoint project in VS2010

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I am working on visual web parts. I created a sharepoint project in VS2010 and added one visual web part to it.Built this and deployed.I am able to see the web part added and I can drag that to any page on site.

Now I created a new solution redirecting to same site (site to which first solution was pointing). Added one visual web part to it.Built this and deployed too.now when I see the site though I can add this new webpart to the page but the webpart added from previous solution are throwing error.

Web Part Error: A Web Part or Web Form Control on this Page cannot be displayed or imported. The type TestWebPart1.Testwebpart.Testwebpart, TestWebPart1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=02dc69d4b9065085 could not be found or it is not registered as safe.

Looks Like I can not work with more than one solution for a single site. May I get the reason for this?

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1 Answer

  1. Editorial Team

    This usually means your webparts assembly isn’t registered among the safecontrols in the sharepoint web.config OR that you didn’t create a strongly typed assembly

    To register in safecontrols

    To fix open your web.config located in the iis root site of your sharepoint server, usual path is something like

    c:\inetpub\wwwroot\wss\VirtualDirectories\80\web.config

    Add the following in the <SafeControls> section

     <SafeControl Assembly="TestWebPart1.Testwebpart.Testwebpart, TestWebPart1, Version=1.0.0.0, Culture=neutral, PublicKeyToken=02dc69d4b9065085" Namespace="TestWebPart1" TypeName="*" Safe="True" AllowRemoteDesigner="True" />

    Signing assemblies

    http://msdn.microsoft.com/en-us/library/ms247123(v=vs.80).aspx

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