Question

I have following database table ‘Date’:

DateId      Date
1       08/05/2012
2       08/01/2012
3       08/25/2012
4       08/15/2012
5       08/22/2012
.....

To get most recent date i am using following expression:

var recentDate = db.Date.OrderByDescending(d => d.Date).FirstOrDefault();  

How can i use recentDate to get previous date or next date using lambda expressions?

When i try to use latestDate i get an error saying:

operator > cannot be applied to operands of type 'System.DateTime' and 'App.Models.Date

this is what i am trying for previous date:

var previous date = top10Date.Where(d => d.Date > latestDate).OrderBy(d => d.Date).FirstOrDefault();

is above expression right? how can i make this work?

Answer 1

You are trying to compare DateTime to App.Models.Date, which the compiler does not know how to compare.

You are probably trying to do the following:

var previous date = top10Date.Where(d => d.Date > latestDate.Date).OrderBy(d => d.Date).FirstOrDefault();