Returning a list of keys with ModelState errors

问题

How can I return a list/array of all keys that have an error?

I have tried to do the below, but it says I can't have that sort of expression for some reason.

ModelState.ToList(item => item.Value.Errors.Count > 0)

回答1:

var errors = from modelstate in ModelState.AsQueryable().Where(f => f.Value.Errors.Count > 0) select new  {  Title = modelstate.Key  };

回答2:

Count is a method. You need ()s after is. But I'd prefer Any, anyway:

from item in ModelState
where item.Value.Errors.Any()
select item.Key

来源：https://stackoverflow.com/questions/888521/returning-a-list-of-keys-with-modelstate-errors