Sandboxed Webpart - Is it possible get the current logged in user?

Question

Using standard windows authentication I attempting to get the identity of the logged in user so I can update a value in a list that this webpart is interacting with.

I have tried:

SPWeb currentWeb = SPContext.Current.Web;
SPUser currentUser = currentWeb.CurrentUser;
return currentUser.ID;

Which only returns the SHAREPOINT\system account.

I have also tried this:

SPWeb web = SPContext.Current.Web;
string loginName = System.Threading.Thread.CurrentPrincipal.Identity.Name
SPUser user = web.EnsureUser(loginName); 

the second line will always come up as an empty string.

Answer 1

Was this windows account the same one with which SharePoint was installed? In that case, you could try to create a new user in AD and then login using the new user credentials.

Answer 2

The first block of code should work properly - unless you are in a block that is running with elevated privileges. If that is the case, you will need to get the current user ID prior to the ElevatedPrivs block.

Answer 3

To get the current user name you have to use SPContext.Current.Web.CurrentUser.Name; now this would return System Account or SPContext.Current.Web.CurrentUser.LoginName this would return SHAREPOINT\system account when you are logged in as the SharePoint administrator(i.e. the account from which you installed the SharePoint). If you want not to get this username then i'm afraid you have to create another account in the AD in order to fix this.