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I need to open several images from a folder and with every image I need to convert it to binary format. How can I open several files automatically within folder\sub folders?

Right Now I am able to open 1 file at a time by manually choosing form the openFileDialog.
openFileDialog1.FileName = "";
openFileDialog1.Title = "Images";           
openFileDialog1.Filter = "Png Images| *.png"; 
if (openFileDialog1.FileName.ToString() != "")
   Image.ImageLocation = openFileDialog1.FileName.ToString();
   img = new Bitmap(openFileDialog1.FileName.ToString());
Posted 9-Nov-12 10:17am
Edited 9-Nov-12 10:42am

1 solution

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Solution 1

If you look closely at the OpenFileDialog class, you will see it has a Multiselect property[^] - set that to true and it will allow the user to select more than one file at a time. You can then use the Filenames property to open each image in a loop.

Do be aware however, that you should Dispose of Bitmap objects when you are finished with, don't just let them go out of scope or it will cause problems later.

BTW: You do not have to call ToString on string objects such as OpenFileDialog.FileName.
Marcus Kramer 9-Nov-12 15:42pm
+5. Excellent.
bmw318mt 9-Nov-12 15:56pm
I have hundreds of images in several sub folders that will be used to train a neural net, that is why I want to load the files one after the other automatically, instead of having the user selecting which files to open.
OriginalGriff 10-Nov-12 3:31am
Then do it with Directory.GetFiles - it has an overload which return subdirectory contents as well:
Directory.GetFiles(path, "*.*", SearchOption.AllDirectories);

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