Delete image from folder when application run in c sharp desktop application

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Hi Experts,

My current project is a desktop application in c#.net. In this project I store images in "ImageFolder". Location is bin\debug or release\ImageFolder.

When I am storing or updating images in the folder they will properly save to that folder.

The code for saving images is:

C#

sAbpath = Application.StartupPath;
Image selImage = null;
selImage = Image.FromFile(sChoose_file).GetThumbnailImage(130, 160, ThumbnailCallback, new IntPtr());
selImage.Save(sAbpath + "\\ImageFolder\\" + strMemberPhotoName);
sNPath = "\\ImageFolder\\" + strMemberPhotoName;

This code runs properly.

But when updating new image for a particular id, the new image updates or saves propely, but the original image can not be delelet from the folder.

The code for that is:

C#

string sOldPath = sAbpath+sNPath;
//sNPath takes from the database 
if (File.Exists(sOldPath))
{
   File.Delete(sOldPath);
}

It will give this error:
"System.IO.IOException the process cannot access the file because it is being used by another process"

In case the application is run and I am opening the folder and try to delete the image, it doesn't allow to delete it and gives the same error, but after closing completely the application, the same image is deleted.

Please guide me weather it is the correct way.
~~its urgent.....~~ [No, it's not]

Thanks and Regards
Chean Chopkar

Posted 13-Oct-10 0:40am

Chetan Chopkar

Updated 13-Oct-10 4:23am

Toli Cuturicu

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OriginalGriff · Answer 1 · 2010-10-13T00:55:00

Read the MSDN for Image.FromFile: http://msdn.microsoft.com/en-us/library/stf701f5.aspx[^]
Particularly read the bit where it says: "The file remains locked until the Image is disposed."

What this means is that when you load an Image from a file using Image.FromFile the original source file remains open and in use until the Image instance you created has be destroyed by the Garbage Collector. Since you have no control over this, you must Dispose of the Image manually when you have finished with it. If you don't and just let it go out of scope, then the file remains locked until the Garbage Collector needs the space. Could be tomorrow, could be next month. File is still locked until then.

Toli Cuturicu · Answer 2 · 2010-10-13T04:32:00

Just Clone your Image and Dispose the original just after loading it:

C#

Image original = Image.FromFile(sChoose_file).GetThumbnailImage(/*...*/);
Image clone = (Image)original.Clone();
original.Dispose();
original = null;

// Now forget about original and never use it again.
// Work only with the clone.

clone.Save(/*...*/);

Delete image from folder when application run in c sharp desktop application

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