How do you force ordering to be numeric

Question

Attempting to sort files numerically. A list of files:

1.jpg 2.jpg 3.jpg 4. jpg 10.jpg 11.jpg 20.jpg

this list would be ordered like so:

1.jpg 10.jpg 11.jpg 2.jpg 20.jpg 3.jpg 4.jpg

    private void button1_Click(object sender, EventArgs e)
    {   
        string x = txtPath.Text;
        string[] path = Directory.GetFiles(x);

        string[] filePaths = path;
        foreach (string element in filePaths)
        {
            lb1.Items.Add(Path.GetFileName(element));
        }

        lb1.Sorted = true;
    }

possible duplicate of [Sorting strings containing numbers in a user friendly way](http://stackoverflow.com/questions/1022203/sorting-strings-containing-numbers-in-a-user-friendly-way) — Josh Anderson, Mar 13 '14 at 19:37

score 0 · Answer 1 · answered Mar 13 '14 at 19:37

They are sorting this way because they are string, and try sort lexicographically.

Try something like this:

string[] line = { "file1.jpg", "file2.jpg", "file10.jpg"};
Regex r = new Regex("/d+");
var result = line.OrderBy(x => r.Match(x).Value);

if you want a string, use this:

string[] result = line.OrderBy(x => r.Match(x).Value).ToArray<string>();

Adapt this to your needs.

the output is:

file1

file2

file10

score 0 · Answer 2 · answered Mar 13 '14 at 19:37

0

You can extract the number of the picture and parsed as some int number, sorted it,and after that put in place extensions.

answered Mar 13 '14 at 19:37

Mihai8

3,113
1
21
31

score 0 · Answer 3 · answered Mar 13 '14 at 19:37

0

ls -v *.jpg

Check the ls man page.

answered Mar 13 '14 at 19:37

ewing

21
1

list into a variable: Files=`ls -v *.jpg` then echo and cut. – ewing Mar 13 '14 at 19:40

How do you force ordering to be numeric

3 Answers3