Sort file by name when get file in directory

Question

4.00/5 (1 vote)

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Hi,

How to get the file in directory sorting?

VB

Dim ImageInfo As FileInfo
Dim imgBrush As New ImageBrush
Dim ImageMediaDirectory As New DirectoryInfo(path)

VB

Dim FileCount As Integer = Directory.GetFiles(path).Length
If FileCount > 0 Then
     For Each ImageInfo In ImageMediaDirectory.GetFiles("*.*")
         GalleryImages.Add(ImageInfo.FullName)
     Next
End If

My images is save as xps_0.bmp,xps_1.bmp - xps_21.bmp(number is dynamic. Images can be 0,1 to any number of images in directory). But when it get files, it insert into

VB

GalleryImages.Add(ImageInfo.FullName)

with xps_0.bmp, xps_1.bmp, xps_10.bmp, xps_11.bmp which jump the number xps_2.bmp. The images in the folder is sorting accordingly. But when retrieve, it jumps.

How can it get the file with sorting 1,2,3,4,5,6 without goes to 1,10,11,12?

Posted 3-Feb-15 20:37pm

Luiey Ichigo

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CPallini · Accepted Answer · 2015-02-03T20:50:00

Solution 1

Because the sort is alphabetic. A simple workaround would be formatting the number in order to make them properly alphabetically ordered (e.g. 000 instead of 0, as well 001 instead of 1, and so on, assuming a maximum of 1000 files in the folder).

Posted 3-Feb-15 20:50pm

CPallini

Comments

Luiey Ichigo 4-Feb-15 3:16am

thanks..manage to deal with it as your advise. When saving the filename into database, I format it to string as:-

strName = pageCount.ToString("0000")

And it's work. Thanks for advise

CPallini 4-Feb-15 5:38am

You are welcome.

Sinisa Hajnal · Accepted Answer · 2015-02-03T20:53:00

You have to write your own sort (click here) in which you parse the number out of the name and sort by the number.

BUT
If you can, easiest way to get around this problem is to save the images as 01, 02, 03 etc...then string sort will work as expected.

The cause of the problem is that string starting with 1 like "10" is in string comparison smaller then "2" since it starts with "lower" string value.

Similar to how you order
yellow
yellowstone
yolk

even if yellowstone is longer then yolk, it is compared y = y, e < o...
between yellow and yellowstone, the comparison goes to w = w and then "" < "s" so yellow goes first.

If this helps please take time to accept the solution. Thank you.