Deleting File Through C# Program.

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Deleting File Through C# Program.

 
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  #1
Oct 7th, 2009
Hi,
In my application i am taking multiple image files from user using openfiledialog and display those image files in flowlayoutpanel. After pressing on Insert button i used to copy all those images in a folder (C:\Images). When there is no file exists the file get copied easily, but if it exists i delete the file, but while deleting file it shows error
"The process cannot access the file"C:\Images\xyz.jpg" because it is being used by another process"

The code i used is
if (File.Exists(destFileName))
{
File.Delete(destFileName);
File.Copy(sourceFileName, destFileName);
}
else
File.Copy(sourceFileName, destFileName);


Is it because i display the images in flowlayoutpanel while deleting. But before execting above code i clears all controls added in the flowlayoutpanel. Still the error occurs.. What should i do?
Regards,
Vidya
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  #2
Oct 7th, 2009
Your process is the one that uses file, you need to set image to null use something like this,

C# Syntax (Toggle Plain Text) 
  1.  using(var img = Image.FromFile(filename).GetThumbnailImage(GetWitdth(filename, GetHeight(filename, 200)), GetfHeight(filename, 200), null, new IntPtr()))
  2. pictureBox1.Image = img;
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  #3
Oct 7th, 2009
I use the following code to add pictureboxes,

PictureBox pb = new PictureBox();
Image loadedImage = Image.FromFile(file);
pb.Height = 245;
pb.Width = 245;
pb.BorderStyle = BorderStyle.None;
pb.Image = loadedImage;
pb.Name = "pic" + j.ToString();
pb.Click += new EventHandler(picture_click);
pb.SizeMode = PictureBoxSizeMode.StretchImage;
flowLayoutPanel1.Controls.Add(pb);

Should i do something like this,
loadedImage=null;

Regards,
Vidya
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  #4
Oct 7th, 2009
If you want to repalce the file if it exists, rather than deleting it then copying it, try changing it to this:

C# Syntax (Toggle Plain Text) 
  1. File.Copy(sourceFileName, destFileName, true);

The boolean at the end sets whether files can be replaced. By setting it to true it should overwrite the file if it already exists
Please don't take for granted the work that solvers do for you. Take the time to fully understand the code they give you so that you might adapt it to future problems.

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Error Due To Image Loaded In Flowlayoutpanel

 
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  #5
Oct 7th, 2009
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Originally Posted by Ryshad View Post
If you want to repalce the file if it exists, rather than deleting it then copying it, try changing it to this:

C# Syntax (Toggle Plain Text) 
  1. File.Copy(sourceFileName, destFileName, true);

The boolean at the end sets whether files can be replaced. By setting it to true it should overwrite the file if it already exists

Sorry, but still error occurs,
But the error occurs only if the image(the path which i want to delete) is loaded in the flowlayoutpanel.

Means, if the image is loaded in the flowlayoutpanel it is not deleted.

Vidya
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  #6
Oct 7th, 2009
had a quick search around the Micrsoft Support site, if you use FromFile in code to set an image file to a picturebox it locks the file. You can avoid this by using a filestream to retrieve the image:

C# Syntax (Toggle Plain Text) 
  1.             System.IO.FileStream fs = new System.IO.FileStream(filename, System.IO.FileMode.Open, System.IO.FileAccess.Read);
  2.             PictureBox1.Image = System.Drawing.Image.FromStream(fs);
  3.             fs.Close();
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Error Due To Image Loaded In Flowlayoutpanel

 
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  #7
Oct 7th, 2009
posted by mistake
Last edited by VidyaYadav; Oct 7th, 2009 at 7:43 am.
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  #8
Oct 7th, 2009
Have you implemented the code i gave you? This solves the problem as it reads the file without locking it.
Your code should look like this:

C# Syntax (Toggle Plain Text) 
  1. PictureBox pb = new PictureBox();
  2. System.IO.FileStream fs = new System.IO.FileStream(file, System.IO.FileMode.Open, System.IO.FileAccess.Read);
  3. Image loadedImage = Image.FromStream(fs);                       
  4. fs.Close();
  5. pb.Height = 245;
  6. pb.Width = 245;
  7. pb.BorderStyle = BorderStyle.None;
  8. pb.Image = loadedImage;
  9. pb.Name = "pic" + j.ToString();
  10. pb.Click += new EventHandler(picture_click);
  11. pb.SizeMode = PictureBoxSizeMode.StretchImage;
  12. flowLayoutPanel1.Controls.Add(pb);
Last edited by Ryshad; Oct 7th, 2009 at 7:57 am.
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  #9
Oct 7th, 2009
Aah, no problem.

I take it the code fixed the issue then? If so, remember to mark the thread as solved.
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  #10
Oct 7th, 2009
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Originally Posted by Ryshad View Post
Aah, no problem.

I take it the code fixed the issue then? If so, remember to mark the thread as solved.

Thank U So Much.....
Finally everything runs fine....

Vidya
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