how to make Image save as a 24-bit image? - c#

How do I get C# to force bitmap images that are saved to be saved as 24-bit images as can be seen when you get the right-click properties of the image in Windows. All the images I save are set to 32-bit. I tried the below code with no luck. The source images are all 24-bit as well but are always saved as 32-bit image
public void Save(int index)
{
string savestrFilename;
SaveFileDialog dialog = new SaveFileDialog();
dialog.Title = "image save...";
dialog.OverwritePrompt = true;
dialog.Filter = "JPEG File(*.jpg)|*.jpg|Bitmap File(*.bmp)|*.bmp";
if (dialog.ShowDialog() == DialogResult.OK)
{
savestrFilename = dialog.FileName;
System.IO.FileStream stream = new System.IO.FileStream(savestrFilename , System.IO.FileMode.Create);
JpegBitmapEncoder encoder = new JpegBitmapEncoder();
encoder.QualityLevel = 70;
encoder.Frames.Add(BitmapFrame.Create(_grabImageList[index].BitmapImage));
encoder.Save(stream);
stream.Close();
}
}

Related

PictureBox Not Releasing Resources

My application is used to store scanned images, with additional information, to an SQL Database. Because I use a picturebox to accomplish this there is an issue I've become aware of with the picturebox holding open resources. This is preventing me from doing anything with the original file until I close my form. I have tried various ways to dispose of the picturebox with no success. Need help with the following code to release the resources held by the picturebox.
using (OpenFileDialog GetPhoto = new OpenFileDialog())
{
GetPhoto.Filter = "images | *.jpg";
if (GetPhoto.ShowDialog() == DialogResult.OK)
{
pbPhoto.Image = Image.FromFile(GetPhoto.FileName);
txtPath.Text = GetPhoto.FileName;
txtTitle.Text = System.IO.Path.GetFileNameWithoutExtension(GetPhoto.Fi‌​leName);
((MainPage)MdiParent).tsStatus.Text = txtPath.Text;
//GetPhoto.Dispose(); Tried this
//GetPhoto.Reset(); Tried this
//GC.Collect(): Tried this
}
}
Saving the image to my database uses the following:
MemoryStream stream = new MemoryStream();
pbPhoto.Image.Save(stream, System.Drawing.Imaging.ImageFormat.Jpeg);
byte[] pic = stream.ToArray();
It's usually FromFile() that causes locking issues: (not the PictureBox itself)
The file remains locked until the Image is disposed.
Change:
pbPhoto.Image = Image.FromFile(GetPhoto.FileName);
To:
using (FileStream fs = new FileStream(GetPhoto.FileName, FileMode.Open))
{
if (pbPhoto.Image != null)
{
Image tmp = pbPhoto.Image;
pbPhoto.Image = null;
tmp.Dispose();
}
using (Image img = Image.FromStream(fs))
{
Bitmap bmp = new Bitmap(img);
pbPhoto.Image = bmp;
}
}
This should make a copy of the image for use in the PictureBox and release the file itself from any locks.

after selecting image display same image inside picturebox

on buttonclick I'm taking image from file system and save into database, everything is ok but I want when I select image to display that image into pictureBox1
OpenFileDialog open = new OpenFileDialog() { Filter = "Image Files(*.jpeg;*.bmp;*.png;*.jpg)|*.jpeg;*.bmp;*.png;*.jpg" };
if (open.ShowDialog() == DialogResult.OK)
{
txtPhoto.Text = open.FileName;
}
string image = txtPhoto.Text;
Bitmap bmp = new Bitmap(image);
FileStream fs = new FileStream(image, FileMode.Open, FileAccess.Read);
byte[] bimage = new byte[fs.Length];
fs.Read(bimage, 0, Convert.ToInt32(fs.Length));
fs.Close();
byte[] Photo = bimage;
You can use Image property to set the Image for PictureBox Control.
Try This:
DialogResult result= openFileDialog1.ShowDialog();
if(result==DialogResult.OK)
pictureBox1.Image =new Bitmap(openFileDialog1.FileName);
if you want to add it in your code
Complete Code:
OpenFileDialog open = new OpenFileDialog() { Filter = "Image Files(*.jpeg;*.bmp;*.png;*.jpg)|*.jpeg;*.bmp;*.png;*.jpg" };
if (open.ShowDialog() == DialogResult.OK)
{
txtPhoto.Text = open.FileName;
}
string image = txtPhoto.Text;
Bitmap bmp = new Bitmap(image);
pictureBox1.Image = bmp;//add this line
FileStream fs = new FileStream(image, FileMode.Open, FileAccess.Read);
byte[] bimage = new byte[fs.Length];
fs.Read(bimage, 0, Convert.ToInt32(fs.Length));
fs.Close();
byte[] Photo = bimage;
Simple code:
picturebox.Image = Bitmap.FromFile(yourimagepath);
OpenFileDialog open = new OpenFileDialog()
{
Filter = "Image Files(*.jpeg;*.bmp;*.png;*.jpg)|*.jpeg;*.bmp;*.png;*.jpg"
};
if (open.ShowDialog() == DialogResult.OK)
{
PictureBoxObjectName.Image = Image.FromFile(open.FileName);
}
openFileDialog1.Multiselect = false;
openFileDialog1.Filter= "jpg files (*.jpg)|*.jpg";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
foreach (String file in openFileDialog1.FileNames)
{
picturebox1.Image = Image.FromFile(File);
}
}
This is for selection of one image.

Converting Bitmap to Icon

I'm trying to convert an image from a Bitmap to a Windows icon. This is the code.
private void btnCnvrtSave_Click(object sender, EventArgs e)
{
Bitmap bmp = (Bitmap)picturePanel.BackgroundImage;
Bitmap newBmp = new Bitmap(bmp);
Bitmap targetBmp = newBmp.Clone(new Rectangle(0, 0, newBmp.Width, newBmp.Height), PixelFormat.Format64bppArgb);
IntPtr Hicon = targetBmp.GetHicon();
Icon myIcon = Icon.FromHandle(Hicon);
SaveFileDialog sfd = new SaveFileDialog();
sfd.Title = "Save Icon";
sfd.Filter = "Icon|*.ico";
sfd.ShowDialog();
FileStream fileStream = new FileStream(sfd.FileName,FileMode.OpenOrCreate);
myIcon.Save(fileStream);
fileStream.Flush();
fileStream.Close();
MessageBox.Show("Image is converted successfully!");
}
The code is working fine but the problem is, when I convert the picture to an icon the converted icon loses its true colors and gradients (shown in image). So, is there any way by which I can convert the image without losing its colors?
This is what my icon looks like.
This is a known issue with .Net since it doesn't have an icon encoder. See the following for possible workarounds.
Create Valid Icon Files
Convert Bitmap to Icon problem

How to save BitmapImage via SaveFileDialog from WPF?

The way I try implement it via standart Windows.Forms (to get valide DialogResult.OK)
System.Windows.Forms.SaveFileDialog dlg = new System.Windows.Forms.SaveFileDialog();
dlg.FileName = "Document"; // Default file name
// dlg.DefaultExt = ".jpg"; // Default file extension
dlg.Filter = "JPeg Image|*.jpg|Bitmap Image|*.bmp|Gif Image|*.gif";
if(dlg.ShowDialog()== System.Windows.Forms.DialogResult.OK)
if (dlg.DialogResult.HasValue && splashDialog.DialogResult.Value)
{
string fName = dlg.FileName;
if (dlg.FileName != "")
{
System.IO.Stream fileStream = (System.IO.FileStream)dlg.OpenFile();
fileStream.Close();
}
}
This is using Windows forms but it saves blank image((
You can do something like that:
var encoder = new JpegBitmapEncoder(); // Or PngBitmapEncoder, or whichever encoder you want
encoder.Frames.Add(BitmapFrame.Create(yourImage));
using (var stream = dlg.OpenFile())
{
encoder.Save(stream);
}
BTW, there is a SaveFileDialog in WPF too, you don't have to use the one from Windows Forms
For WPF code will be like :
Microsoft.Win32.SaveFileDialog dlg = new Microsoft.Win32.SaveFileDialog();
dlg.FileName = "Document";
dlg.Filter = "JPeg Image|*.jpg|Bitmap Image|*.bmp|Gif Image|*.gif";
if (dlg.ShowDialog() == true)
{
var encoder = new JpegBitmapEncoder(); // Or PngBitmapEncoder, or whichever encoder you want
encoder.Frames.Add(BitmapFrame.Create(bi));
using (var stream = dlg.OpenFile())
{
encoder.Save(stream);
}
}
Here bi is the BitmapImage

How to save an image to a file in WPF

I am new in wpf control and framework. I cant seem to save my images can you help me
Below is my code
SaveFileDialog sfd = new SaveFileDialog();
sfd.FileName = System.IO.Path.GetFileNameWithoutExtension(newlist[currentPicture]);
Nullable<bool> result = sfd.ShowDialog();
if (result == true)
{
System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(newlist[currentPicture]);
bmp.Save(newlist[currentPicture]);
}
For a System.Drawing.Bitmap, you need to pass the dialog's FileName property to the Save method.
EDIT: In WPF:
var encoder = new PngBitmapEncoder()
encoder.Frames.Add(BitmapFrame.Create(image));
using (var stream = dialog.OpenFile())
encoder.Save(stream);

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