How to sort List<List<UInt32>> according to List<UInt32>[0] number ASC/DESC in C#?

Question

Hi,

How shall sort this in ASC order?

I got List<List<UInt32>> full of records of List<UInt32> and I want those records to be sorted according to the first column in each record - the column is UInt32 number.

So:

I have List of:

new List<UInt32>: 32,1,1,1,1,1
new List<UInt32>: 22,2,2,2,2,2
new List<UInt32>: 32,1,1,1,1,1
new List<UInt32>: 1,1,1,1,1

which should be sorted to:

List<UInt32>: 1,1,1,1,1
List<UInt32>: 22,2,2,2,2,2
new List<UInt32>: 32,1,1,1,1,1
new List<UInt32>: 32,1,1,1,1,1

-> Only first number matter! others are not important for sorting. I'm lookin for ASC thing, but both would be fantastic so when I think algorithm should be changed, I'll look it up :)

Thank you for your effort to help !

@Samuel, Thank you, I'll try to implement it when I try to change the type :)

Answer 1

Nearly a duplicate of:

http://stackoverflow.com/questions/721577/how-to-sort-listliststring-according-to-liststring-number-of-fields

Something like:

var sorted = parent.OrderBy( l => l[0] );

Or:

parent.Sort( (a,b) => a[0].CompareTo( b[0] ) )

Answer 2

While John's answer works, I would suggest using First() instead of accessing the 0 element in the list. This way it works for any IEnumerable<T> not just IList<T>.

var sorted = list.OrderBy(subList => subList.First());