How Do I Get Picture Size From A Picture Box

Question

0.00/5 (No votes)

See more:

Hello everyone, i want to diplay the size of an image in a picturebox control, a few examples i have found online are using openfile dialog control, but i am not uploading the picture, it is already in the picture box, i have tried this:

C#

Image img = Image.FromFile(openDialog.FileName);
double fileWidth = img.Width;
double fileheigth = img.Height;
double fileByte = (((fileWidth) * (fileheigth))/1024);
label2.Text = "Image Size: " + fileByte.ToString() + " KB";

But it doesn't seem to work, please i will appreciate any assitance. Thanks in advance

Posted 17-Apr-14 0:15am

Uwakpeter

Add a Solution

Comments

CPallini 17-Apr-14 6:21am

What 'size' do you want to know?
Unless there is a file (saving to or loading from the image), there is no file-size (that is it depends on the file format). On the other hand, I doubt it would be useful knowing the in-memory size of the image.

DamithSL 17-Apr-14 6:24am

what is the application type? how you load or set image of the picturebox ?

Uwakpeter 17-Apr-14 6:32am

it is a C# windows application, i am loading the image with open file dialog box, and now resized the picture, i have been able to display the original and the resized image on picture boxes, i have also display the original image size, the issue now is to display the resized image size. The format is in Png.

lukeer 17-Apr-14 7:47am

PNG is a format with lossless compression. You can't exactly tell in advance how large a file it will produce.

Your only chance for an exact value is to save to a file and display the size after that.
Or you settle for a coarse estimate and scale the original file size by pixel count_ratio = newPixelCount/oldPixelCount.

Uwakpeter 17-Apr-14 7:52am

Thanks Lukeer, the file comes in different formats(jpg,jpeg,gif png), i only reduce the uploaded file size and save in png format, it is png format size that i want to get.

for now i can only compare their different sizes after i have save the resize passport to a folder, i want to display this in the application as well.

this the code that i use to save to a folder:

picBoxResized.Image.Save(@"C:\Users\Default.DEV-PC\documents\picture.png", ImageFormat.Png);

so please how do i display the size after saving to a file here?

lukeer 22-Apr-14 3:07am

You know the file path, use it to get a FileInfo object. It has a Length property.

Or, without disk interaction, save to a MemoryStream instead. It offers a Length property as well.

Uwakpeter 17-Apr-14 7:52am

Thanks Lukeer, the file comes in different formats(jpg,jpeg,gif png), i only reduce the uploaded file size and save in png format, it is png format size that i want to get.

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)