Open DNN6.0 with vs2010 source project load error: "http://localhost/DotNetNuke_Community: error: can not open site" http://localhost/DotNetNuke_Community ". Visit the Web site configuration fileerror occurred.".
Please experts answer it?

The DNN source code is broken into a number of components.

The core libraries, providers, and core web libraries, are created as compiled WAP project modules - which generate the dll's that appear in the /bin/ folder at runtime.   The MAIN site code however, is create as a WSP  project which uses JIT compilation methods to manage the website project at runtime, 

For vs2010 to work correctly is needs to be able to see the any WSP base web site project as an active website.  That is, it needs to be able to browser to the web site location from inside vs2010.  

The message you are seeing is telling you that, your website cannot be found at http://localhost/DotNetNuke_Community which is the default install location -  what you need to do is alter this setting to point to the location of the website folder in the source code folder set.
And this folder needs to be setup as a running website.

FWIW though - I would suggest NOT using the source code version of DNN unless you really need to.  On day to day basis there is rarely any real reason to use the source code version - since you should never recompile the source since doing so would most likely prevent any future upgrades.

Instead work with a normal install.zip site - and develop and modules, providers, skin objects based on that version.

Westa
Westa

The source code version does NOT come with any compiled dlls  -  before you can run the site for the first time.
This is after you get the ''sln file to load property - need need to switch the solution to Release mode and run a FULL compile of the site.
This MUST be done in release mode - as in this mode there are msbuild instructions that tell vs2010 how to create the dll files and properly insert them into the website/bin folder - it also moves some other elements around like the default darkknight skin and makes sure its package is in the right place.

As I think Ive said before - the source code version is really only there for people that have a pretty deep / extensive knowledge of how large / complex asp.net systems work.  Life is so much easier working with a Install.zip live site .

Westa