Sharepoint web part: type could not be found/registered as safe

Question

I have a SharePoint web part (essentially just a "Hello World" app) that I just created and am having a problem deploying it. I have signed the .dll, created the .dwp, and registered it as a safe control in web.config. I am able to add it to the Web Part Gallery and add the details for it; however, when I attempt to add it to a page, I get the following error:

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.

Following is my .dwp file:

<?xml version="1.0"?>
<WebPart xmlns="http://schemas.microsoft.com/WebPart/v2"&gt;
   <Assembly>SimpleWebPart, Version=1.0.0.0, Culture=neutral, PublicKeyToken=################</Assembly>
   <TypeName>MyWebParts.SimpleWebPart</TypeName>
   <Title>My Simple Web Part</Title>
   <Description>A simple Web Part</Description>
</WebPart>

and the entry I added to web.config:

<SafeControl Assembly="SimpleWebPart, Version=1.0.0.0, Culture=neutral, PublicKeyToken=################" Namespace="MyWebParts" TypeName="*" Safe="True" />

I also tried using wildcards for the namespace, which didn't help. I have even tried setting the web.config trust level to "Full" (which I would never do in production, but tried to attempt to narrow down the problem) and still had no luck. Any ideas? Thanks.

Answer 1

Make sure that you have the Web Part class as Public, might sound silly but I faced once. Also try to populate the web part from the Web part Gallery .

Answer 2

Did you try deploying it to the GAC?

Answer 3

Geo,

It's been a while since I worked with Web Parts but I laid out the steps here:

http://www.codersbarn.com/?tag=/webpart

Maybe there's something there that can help.

Anthony :-)

Answer 4

Are you deploying your webpart using a SharePoint Solution (.wsp file)? Check out WSPBuilder if you aren't. We also use SharePoint Installer Between the two, a lot of the problems (whether stemming from human error or otherwise) in deployments, like your problem have been resolved in our environment.