How to Clear an image control in WPF (C#)

Question

4.50/5 (3 votes)

See more:

I have an image control with a source image located in my c drive. I get a message that the image is being used by another process whenever I try to delete the original image to change it with another one dynamically. How do I release the image from the image control to be able to delete it.

I tried this variants:

C#

string path = ((BitmapImage)img.Source).UriSource.LocalPath;
img.SetValue(System.Windows.Controls.Image.SourceProperty, null);
File.Delete(path);

And:

C#

string path = ((BitmapImage)img.Source).UriSource.LocalPath;
img.Source = null;
File.Delete(path)

But it's not work...

This code produces the following error when the DeleteImage method is called:

The process cannot access the file 'C:\Picther.jpg' because it is being used by another process.

Posted 25-May-12 6:44am

Member 3232874

Updated 25-May-12 7:26am

v4

Add a Solution

Comments

El_Codero 25-May-12 12:51pm

Please improve your question! What do you mean with "when we using it"? How are this images stored? As Resource or filepath to hdd?

Member 3232874 25-May-12 13:09pm

string path = ((BitmapImage)img.Source).UriSource.LocalPath;
img.SetValue(System.Windows.Controls.Image.SourceProperty, null);
File.Delete(path);

Error:
The process cannot access the file 'C:\Picther.jpg' because it is being used by another process.

And:
string path = ((BitmapImage)img.Source).UriSource.LocalPath;
img.Source = null;
File.Delete(path)

4 solutions

Solution 5

Here is another way I found to load an image into memory and use it as an image source:

BitmapImage image = new BitmapImage();
image.BeginInit();
Uri imageSource=new Uri("file://"+ "C:/temp/FoxLogo.png");
image.UriSource = imageSource;
image.EndInit();
img.Source = image;

Posted 25-May-12 9:19am

Clifford Nelson

Comments

Spencer Kittleson 31-May-14 17:31pm

This solution works great. Here is a image object held in memory based solution as well.

//convert bitmap to bitmapimage
using (var memory = new MemoryStream())
{
image.Save(memory, ImageFormat.Png);
memory.Position = 0;

var bitmapImage = new BitmapImage();
bitmapImage.BeginInit();
bitmapImage.StreamSource = memory;
bitmapImage.CacheOption = BitmapCacheOption.OnLoad; // this is key to destory the image with a new image coming in.
bitmapImage.EndInit();

wpfPictureBox.Source = bitmapImage;
}

Solution 4

I think what you are trying to do is change the image dynamically. You can read image to memory, and use that instead of the actual file. Read the file into memory, use it as the source for the image, and then do any changes to the original file:

Bitmap bitmap = new Bitmap(@"C:\temp\FoxLogo.png");
IntPtr hBitmap = bitmap.GetHbitmap();
ImageSource wpfBitmap = Imaging.CreateBitmapSourceFromHBitmap(hBitmap, 	IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions()); ;
	img.Source = wpfBitmap;		
bitmap.Dispose();

May be a better way to do this.

Posted 25-May-12 8:51am

Clifford Nelson

Add a Solution

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)

El_Codero · Accepted Answer · 2012-05-25T07:48:00

Solution 1

Hi,

it's a bit tricky to achieve this because BitmapStream from BitmapImage couldn't be disposed by ImageControl.
BitmapCacheOption.OnLoad Property solves this problem, like this:

C#

public MainWindow()
      {
          InitializeComponent();
           //Display your image in Image Control
          image1.Source = BitmapFromUri(new Uri(@"c:\test.jpg"));
      }

      private void button_DEL_Image_Click(object sender, RoutedEventArgs e)
      {
          image1.Source = null;
          File.Delete(@"c:\test.jpg");
      }

      public static ImageSource BitmapFromUri(Uri source)
      {
          var bitmap = new BitmapImage();
          bitmap.BeginInit();
          bitmap.UriSource = source;
          bitmap.CacheOption = BitmapCacheOption.OnLoad;
          bitmap.EndInit();
          return bitmap;
      }

Regards

Posted 25-May-12 7:48am

El_Codero

Updated 25-May-12 7:49am

v2

Comments

El_Codero 25-May-12 14:08pm

yes, tried it a few minutes ago in my enviroment and it works. What exactly doesn't work?

Shahin Khorshidnia 25-May-12 14:12pm

Sorry I tried it again and it worked. ( mistake in copy&pasting code ;) )
My +5

El_Codero 25-May-12 14:30pm

Glad it works for you now. Thanks for upvoting, but who has downvoted??

Shahin Khorshidnia 26-May-12 0:04am

I don't know who?! But I think he/she was not a platinum. By the way I've upvoted and now, I also clicked on bookmark for this solution.

El_Codero 26-May-12 16:45pm

No problem with downvoting, but a reply like "because of..." would be nice. Thanks for upvoting and bookmarking Shahin ;) Regards

VJ Reddy 31-May-12 20:09pm

Good answer. 5!

El_Codero 1-Jun-12 18:04pm

Thank you Reddy!

Hamza AL-Shlafi 31-May-20 10:04am

Thank you very much ,This solution is success

Dinesh Kudale 2022 23-Aug-22 6:30am

Thanks for sharing this code. Great work.

Shahin Khorshidnia · Accepted Answer · 2012-05-25T08:00:00

Hello

Try this:

C#

img.Source = null;
(new System.Threading.Thread(() =>
 {
     while (true)
     {
         try
         {
             File.Delete(path);
             MessageBox.Show("Picture Removed");
             break;
         }
         catch{}         
     }
 })).Start();

You can show a ProgressBar while tring to remove, that is showing: "Please wait to remove the file..."

How to Clear an image control in WPF (C#)

4 solutions

Solution 1

Solution 2

Solution 5

Solution 4

Add your solution here

Preview 0

Existing Members

...or Join us