问题
I' m using this instruction:
db_user = db.CBR_User.FirstOrDefault(p => p.Codice_Fiscale == code);
I want use "like" operator instead == for manage case insensitive
How can do it?
thanks
回答1:
If you want to do an equality comparison anyway, I suggest two ways:
db_user = db.CBR_User.FirstOrDefault(p => p.Codice_Fiscale.Equals(code, StringComparison.OrdinalIgnoreCase));
Or
db_user = db.CBR_User.FirstOrDefault(p => p.Codice_Fiscale.ToUpper() == code.ToUpper());
If you don't want that, you can use StartsWith, Contains, etc, with the parameter StringComparison.OrdinalIgnoreCase.
回答2:
You can use Contains():
db_user = db.CBR_User.FirstOrDefault(p => p.Codice_Fiscale.Contains(code));
回答3:
I know this is an old topic, but to expand on what Kristof Claes was saying,
db_user = db.CBR_User.FirstOrDefault(p => p.Codice_Fiscale.ToUpper().Contains(code.ToUpper()));
if you use the ToUpper option, it will act as if it is a case insensitive search. You could use ToLower to do the same thing, in case you have that penchant.
回答4:
In LINQ To Entity you have functions like StartsWith, EndsWith and Contains that you can use instead like
来源：https://stackoverflow.com/questions/4958082/entity-framework-and-where-with-like