Saving image files in GDI Plus

Question

I have two image bitmaps in memory both of same resolution(height x width x bpp). I would like to save one of them on to a file as JPG. I want to save the one which will take up lesser disk space or have a lesser file size. Can I find out the file size before saving the image?

Ankur Jain · Answer

Hi! sorry for that i guess this time its correct you can get file size in bytes at the time of uploading by using FileUpload1.PostedFile.ContentLength it gives you file size in bytes like this... long FileInBytes = FileUpload1.PostedFile.ContentLength; double FileInMB = (FileInBytes / 1024f)/1024f; Response.Write(File Size:  + FileInBytes.ToString() +  bytes ( + FileInMB.ToString() +  MB));

Dhaval Shah · Answer

Hi Ankur Thanks for the reply. I believe you are assuming that the file is already saved and available. What I am trying to achieve is to predict/estimate the file size before doing the I/O operation. And I want to save only the bitmap which will consume lesser space.

Ankur Jain · Answer

Hi! try like this.. Add namespace: Using System.IO; string sMyFileName = ~/photos/test.jpg; FileInfo finfo = new FileInfo(Server.MapPath(sMyFileName )); long FileInBytes = finfo.Length; long FileInKB = finfo.Length / 1024; long FileInMB = FileInKB /1024; Response.Write(File Size:  + FileInBytes.ToString() +  bytes ( + FileInMB.ToString() +  MB));