Select Max Value in linq to entities

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Select Max Value in linq to entities

asp.net-mvc-3 entity-framework linq

Question

I am trying to select MAX LevelId value for a user and then assign that value to a variable.

In plain SQL the equivalent is:

SELECT        MAX(LevelID) AS MaxLevel
FROM            Character
WHERE        (UserId = 'John')


//Check User existing Characters max level per user

int UserLevelID = 0;

var userQuery = (from o in db.Characters
where o.UserId == UserID
      select o);

UserLevelID = userQuery.Max(LevelID);

Here lies the problem. I don't know how to extract the max value of levelID

MataHari

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Jon Skeet · Accepted Answer · 7/6/2012 4:13:57 PM

You can do it all in one query:

var userLevelId = db.Characters.Where(o => o.UserID == UserID)
                               .Max(o => o.LevelID);

I've changed it away from being a query expression because that was introducing more cruft - use query expressions where they actually help readability, and extension method calls for simple solutions where they're more readable.

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