How do I sort list entries?

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I have following data in my list and I want to sort it in following order.

entries are like below,

List<String> codeb = new List<string>();
           codeb.Add("CH-01-0223,B");
           codeb.Add("CH-01-0220,A");
           codeb.Add("AL-01-0023,B");
           codeb.Add("AL-01-0200,A");
           codeb.Add("AL-02-0101,B");
           codeb.Add("AL-02-0201,A");

I want result like below,

AL-01-0200,A
AL-01-0023,B
AL-02-0201,A
AL-02-0101,B
CH-01-0220,A
CH-01-0223,B

What I have tried:

I tried using

C#

codeb.sort()

but it gives sorting like below,

AL-01-0023,B
AL-01-0200,A
AL-02-0101,B
AL-02-0201,A
CH-01-0220,A
CH-01-0223,B

Posted 3-Sep-18 1:15am

Member 11543226

Updated 3-Sep-18 1:41am

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Patrice T 3-Sep-18 7:30am

Show a single piece of code that build the list, sort and display result.

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OriginalGriff · Answer 1 · 2018-09-03T01:41:00

You can't just used a "standard string sort" and expect it to give you results that aren't in standard string order - and string ordering is based on comparing each character in turn from the left to the right and the whole comparison being based on the first different character.

You need to provide a custom sort method and call it from OrderBy:

var sorted = codeb.OrderBy(s => s, Comparer<string>.Create((l, r) => MySortMethod(l, r)));

Your method will look like this:

private int MySortMethod(string l, string r)
    {
    ...
    }

And returns -1 if l is less than r, 0 if they are the same, and 1 if l is greater than r.

Since I have no idea why your required sort order is the way it is you will have to write that bit yourself!