I'm using the SPGridView in a custom page which has been deployed via SharePoint Designer. Now in 2007 everything worked fine but in 2010, the paging doesn't work and results in an error if you try and move to the next page so my question is;
When using custom code compiled for 2007 assemblies, does SharePoint use the 2007 controls (SPGridView) or does it perform some sort of redirect and try and use the 2010 controls? It's the only explanation I can think of that could be causing problems.
The SPGridView is contained in the Microsoft.SharePoint.dll assembly (Microsoft.SharePoint.WebControls namespace).
Which version of the Microsoft.SharePoint.dll is installed on your server? If you are using a server with 2010 installed, you should read this MSDN post on how to redeploy customizations that were built for 2007 in 2010.
I strongly recommend that you don't try to use a different version of the SharePoint.dll just for that control, you will end up with a mess. Just build your code for 2010 using the article that I linked to and your paging should work fine.
