订购一个数组C＃.NET

Question

I have a list of DICOM images and would like to sort by Z order (it's an attribute within the image)

here's my code for adding the images to the List

  private List<DicomImage> img = new List<DicomImage>();

   for (int i = 0; i < imagenes.Count; i++) //imagenes is a variable that holds the number of images (coming from an OpenFileDialog)
         {

            img.Add(new DicomImage(imagenes[i]));
          }

Now, how can I order ascending by Z?

Let's say Z attribute can be accessed simply by entering something like this:

int Z=img[i].Z;

Answer 1

Assuming imagenes is some sort of IEnumerable<T> , I'd use LINQ for the whole thing:

var dicomImages = imagenes.Select(original => new DicomImage(original))
                          .OrderBy(image => image.Z)
                          .ToList();

Answer 2

If img is a List<T> , you can use the Sort(Comparison<T>) method.

img.Sort((img1, img2) => img1.Z.CompareTo(img2.Z));

This just tells the sort method that when comparing two images, call this function that just reverts to comparing their Z values for the result.

Answer 3

building on the comment to John skeets answer here's a more performant variant which saves on copying the images over

var dicomImages = ofdmulti.FileNames.Select(filename => new DicomImage(filename))
                                    .OrderBy(image => image.Z);

foreach (var image in dicomImages)
{
    // Do Something usefull
}