Sort by month in linq and EF

Question

I have a linq query and inside of it is the month name. I want the results sorted by the month (Jan, Feb, Mar, ...).

Currently I have the below but it\'s giving me and e

Answer 1

You've got few options. You could use a long list of optional operators to map the names to numbers

order by s.MonthName == "Jan" ? 1 : s.MonthName == "Feb" ? 2 : ...

You could create a table in your DB that maps the names to nummeric values

var shockValues = (from s in ctx.Shocks
                   join o in MonthOrder on s.MonthName equals o.MonthName
                   where s.ID == id
                   orderby o.MonthNumber
                   select new 
                   {
                       val = s.MonthName + "=" + s.ShockValue
                   });

Or do the ordering in memory

var shockValues = (from s in ctx.Shocks
                   where s.ID == id
                   select new
                          {
                              s.MonthName,
                              s.ShockValue
                          })
                  .AsEnumerable()
                  .OrderBy(s => DateTime.ParseExact(s.MonthName, "MMM", CultureInfo.InvariantCulture).Month)
                  .Select(s => new 
                               {
                                   val = s.MonthName + "=" + s.ShockValue
                               });