In dnn 4.7, some extra code was added to DotNetNuke.Modules.Admin.Authentication.Login (\admin\Authentication\Login.ascx.vb), in order to allow for correct language setting after user login.

In dnn 4.8.1, after the user is succesfully validated, he is redirected to the return url. This happens in line 534 of flie \admin\Authentication\Login.ascx.vb:

Response.Redirect(RedirectURL, True)

Here lies the pain. RedirectUrl is a protected property in the same class, so you can not reference it from another class. However, it contains some key functionality. From line 179:

'replace language parameter in querystring, to make sure that user will see page in correct language

If UserId <> -1 Then

      If User.Profile.PreferredLocale <> CultureInfo.CurrentCulture.Name Then

            _RedirectURL = UrlUtils.replaceQSParam(_RedirectURL, "language", User.Profile.PreferredLocale)

      End If

End If

What happens here is that the language parameter from the return url is changed into the preferred locale of the logged on user. If you are writing your own logon, you should at least mimic this behaviour, otherwise the user will not switch to the correct language.

 

Thank you very much Erik , that was the trick.

I just mimic what you explained above, in my code and it is working perfectly.

DV FX,

Erik is on vacation until end of the week, i.e. please be patient.