I display an image using c# in a pictureBox. Then I want to change the image's name. I can't because I get that the image is being used by another process.
I open the image this way
Image image1 = Image.FromFile("IMAGE LOCATION"); ;
pictureBox1.Image = image1;
Then try to change it's name this way and I get an IO exception saying " The process cannot access the file because it's being used by another process.
System.IO.File.Copy(#"OldName", #"NewName"); //copy changes name if paths are in the same folder
Isn't the object image1 holding the image? Why is the file still locked by the previous process? Any suggestions would be appreciated. Many thanks!
Have a look at this question: Free file locked by new Bitmap(filePath)
To free the lock you need to make a copy of the bits:
Image img;
using (var bmpTemp = new Bitmap("image_file_path"))
{
img = new Bitmap(bmpTemp);
}
Yes, picture box control locking IO file on the disk in that way.
If you want to rename linked file, you can:
or dispose picture box, and after rename the file (if this is suitable for your app)
or assign to the picture box a copy/clone of the image.
You can try this:
Image image1 = null;
using(FileStream stream = new FileStream("IMAGE LOCATION", FileMode.Open))
{
image1 = Image.FromStream(stream);
}
pictureBox1.Image = image1
;
you need to dispose your image:
Image image1 = Image.FromFile("IMAGE LOCATION"); ;
pictureBox1.Image = image1;
image1.Dispose();
the do the move.
this solution solved my problem. I was using a picturebox and loading its image directly from the disk without an intermediate image file. when I was done I was doing a "picturebox.dispose" and that did not free up the image file and I couldn't delete it because "file in use by vshost". I had to explicitly create an image variable (IE dim MyImage as image) and then first load the image into the image variable, then load MyImage into the picturebox. by having a reference to the image I could do a MyImage.dispose. That closed the link between vshost and the image and I was able to programmatically delete it.
Related
I am attempting to add a .PNG image to a PictureBox, but it does not seem to be reading it.
public static String NoteImage_path = Environment.CurrentDirectory + #"\Notes-Images\";
ImageLocation = NoteImage_path + "test" + ".png";
With this exact code, I had no issues adding a .BMP file, so why is there an issue with the .PNG file?
Any help will be appreciated. Thanks!
Add PictureBox on the form
List item
Browse Image property
Resource Context
Import button
Chose Png file.
You can do it by code.
pictureBox1.Load(#"C:\Mine\download.png");
I am new to C# and i am willing to learn it by creating different projects (I am working at one right now). I am trying to make a picture box show different frames of a gif file. I have tried doing this with FrameDimension and SelectActiveFrame but it won't work. I have also tried to split the frames of the gif and separate them into different .png files. I have added them in my Resources folder in my project and i have tried to make the picture box show them.
Here is the code I wrote:
public void Form1
{
InitializeComponent();
DrawPNG();
}
public void DrawPNG()
{
Bitmap bmp = Properties.Resources.pic1;
picBox1.Image = bmp;
bmp = Properties.Resources.pic2;
picBox1.Image = bmp;
bmp = Properties.Resources.pic3;
picBox1.Image = bmp;
bmp = Properties.Resources.pic4;
picBox1.Image = bmp;
}
The problem is that the picture box will constantly show the first frame and it won't change. I am out of ideas of how to do this and I have looked up on the internet and haven't found anything. Can someone help me please?
Oh, and by the way, I am working on a Windows Forms Application.
I want to display an image (.tif, gray value 16 bit) which is editable for the user via sliders. The displayed image should directly react to the changes, so the user knows what he's doing to the image.
Currently I only seem to be creating new files with every change and displaying the latest one, which is a terrible solution.
My idea would be to load the original pixeldata, put it in some sort of temporary file which isn't and won't be saved, then saving the parameters of the sliders and when hitting save applying the parameters to the original image (since in the end the filter is used on an intire set of images).
An Image is not a File. If might be that you display the Image that is in a file, but once you've loaded the file into an Image object don't ever use the file again, until the edited image needs to be saved in a file.
You say you want to display an image. As you are using winforms, I assume you are using a PictureBox control. If not, you have a class that you order to display an Image.
Image imageToDisplay = GetImageToDisplay();
this.PictureBox1.Image = imageToDisplay;
GetImageTodisplay will read the file and return it as an Image
System.Drawing.Image GetImageToDisplay()
{
FileStream imageStream = new FileStream(this.GetImageFileName(), FileMode.Open);
System.Drawing.Image image = new Image(imageStream);
return image;
}
Apparently you also have sliders. You don't mention the class of your sliders, but apparently it is an object that notifies your form about a new slider value.
void OnSliderValueChanged(object sender, int sliderValue)
{
Image displayedImage = this.PictureBox1.Image;
this.ProcessSliderChanged(image, sliderValue);
}
Until now I don't see the creation of a new file. So this should be in ProcessSliderChange. Luckily that is a function you created yourself. All you have to do is change the image according to your new slider value. Don't do anything with file handling and you won't get a new file
void ProcessSliderChange(System.Drawing.Image image, int sliderValue)
{ // what do you want to do with the image?
// make it darker? move it? change contrast?
}
Unfortunately the Image class doesn't have a lot of functions to edit images, I assume you have a library with functions that act on System.Drawing.Image objects. Just use those functions to change your Image.
I found some easy ways to load image to picturebox but I couldn't find an easy way to load image to picturebox backround.
If you know any easier example than this...
var request = WebRequest.Create("http://www.example.com/image.jpg");
using (var response = request.GetResponse())
using (var stream = response.GetResponseStream())
{
pictureBox1.BackroundImage = Bitmap.FromStream(stream);
}
...please share it.
The two easy ways to load image from url to picturebox are...
pictureBox1.ImageLocation = "http://www.example.com/image.jpg";
pictureBox1.Load(url);
But I cannot use them
The reason that I want to use BackroundImage instead of Image is that I want to stretch the image.
If you want to strech your image to fit the PictureBox you can PictureBox.SizeMode to StretchImage.
This will work when you specify your image using the pictureBox1.ImageLocation property or the pictureBox1.Load() method.
As easy as :
pictureBox1.BackgroundImage=your_Image;
For more info check here
1.
http://msdn.microsoft.com/en-us/library/system.windows.forms.control.backgroundimage.aspx
or
2.
Picture Box have both Image and Background Image Property
to set Background Image you have to set pictureBox1.BackgroundImage=your_Image;
and for Image property pictureBox1.Image=your_Image;
from here: PictureBox BackgroundImage Property C#
I'm developing WPF with C# and I have this code to get the picture angry.png from the smiles folder in the output folder (e.g. bin\debug):
BitmapImage bitmap = new BitmapImage(
new Uri(#"smiles/angry.png",
UriKind.RelativeOrAbsolute));
But I want to get the picture angry.png from another location like Resources\Image\smiles\angry.png. Could you tell me how to change the folder location so that this would work?
In that case ..\..\Resources\Image\smiles\angry.png should be sufficient.