ServiceLocator.Current.GetInstance<FOO>() returns null, crashing

ServiceLocator.Current.GetInstance<FOO>() returns null, crashing AlloyDemo

Alex

Vote:

Hi all,

I'm currently running through the CMS training content with AlloyDemo, and I'm currently getting a server error for this line:

Object reference not set to an instance of an object.

AdministratorRegistrationPage.cs

Line 57: var res = provider.GetAllUsers(0, 1, out totalUsers);

In addition, I'm getting a similar error for other classes when commenting out Administrator Registration. This happens whenever provider is null, given by the line:

var provider = ServiceLocator.Current.GetInstance<UIUserProvider>();

Does anybody know why ServiceLocator would return null? This happened sort of out of the blue. Everything worked fine on February 6th.

Thank you!

#216535

Edited, Feb 08, 2020 18:35

TecroNet - Feb 08, 2020 18:41

Does anybody know why ServiceLocator would return null? This happened sort of out of the blue. Everything worked fine on February 6th.

Daniel Ovaska

Vote:

There is a line there that enables .net identity for Episerver. My best guess is that you accidentally removed that. That would cause an error like you described.

#216538

Feb 08, 2020 18:50

Quan Mai

Vote:

Make sure that you still have AddCmsAspNetIdentity called in your code. This is where it registers UIUserProvider

As a side note, you should try to use constructor injection instead of ServiceLocator

#216556

Feb 10, 2020 8:12

valdis - Feb 10, 2020 15:18

+1 ;)

Alex - Feb 10, 2020 15:38

Thanks! I must have absentmindedly CTRL-X'ed the line, like Daniel mentioned as well.