Given the following values in order :
011124
01112
011123
1905
How could I use Linq to sort this:
List<string> values = new List<string>() { "011124", "01112", "011123", "1905" };
.. so it is effectively this:
List<string> values = new List<string>() { "011124", "011123", "01112", "1905" };
(updated: added '1905' as the previous demo would have sorted easily with an int sort -- sorry for the confusion)
Try this snippet:
var sortedValues = values
.OrderByDescending(x => x.Length)
.ThenByDescending(x => Convert.ToInt32(x));
If you really need use it as a List, then add ToList() at the end.
Convert.ToInt32(x). Is that actually going to be the resulting value (eg : 011123 would end up as 11123) ? I need to keep the 0 in front.
IOrderedEnumerable<string>.I'm going to assume you actually care about the value of each integer. If so:
var sortedValues = values.OrderByDescending(x => x.Length)
.ThenByDescending(x => int.Parse(x));
This will yield a deferred IOrderedEnumerable<string>. The int.Parse is only for the purpose of secondary ordering. If you need to materialize it, ToArray or ToList will need to be called.
Most of the answers here are written using Lambda Syntax, if you want query syntax try this. Result should be the same.
var sortedValues = from x in values
orderby x.Length descending, x descending
select x;
values.OrderByDescending(x => x.Length).ThenByDescending(x => int.Parse(x));
Convert.ToInt32()as this returns a 0 on non-convertible numbers whereint.Parse()would throw an exception. Both are good, and truly do appreciate everyones input. I have voted everyone up as well :)Convert.ToInt32will internally callint.Parse, which will throw an exception if it is a non-convertible string. Only if thestringis null, then it will return 0.