C#•4mo ago

The problem with the 'name' argument in EF, WinForms

System.ArgumentException: 'The argument 'name' cannot be null, empty or contain only white space.' Let me know, if you need any additional information.

6 Replies

Angius•4mo ago

FYI, if you only need the FullName, a better query would be

string? sotrNam = _repository.Sotrs
    .Where(s => s.Id == _sotrId)
    .Select(s => s.FullName)
    .FirstOrDefault();

string? sotrNam = _repository.Sotrs
    .Where(s => s.Id == _sotrId)
    .Select(s => s.FullName)
    .FirstOrDefault();

Seems the exception happens somewhere else? I don't see anything have a name argument anywhere here

vitaliiklimenkoOP•4mo ago

Exception happens with any of my DbSet objects, but only in this Presentater (I use MVP).

Angius•4mo ago

Could it be that some of the database models you have have non-default constructors?

vitaliiklimenkoOP•4mo ago

It seems, that I've found the error, thank you for feedback, you're kind

Angius•4mo ago

Ah, yeah, that would do it

jcotton42•4mo ago

@vitaliiklimenko adding onto this, your EF models shouldn’t have constructors at all.

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The problem with the 'name' argument in EF, WinForms