Loading and Saving an Image
Bitmap comes with various methods to load images. The C1Bitmap class provides several Load method overloads to load image from various sources such as a file or memory stream. It also allows you to load image metadata, which can be used to determine image size, pixel format, or resolution (in dots-per-inch).
The loaded image can be saved to a file or a memory stream. The C1Bitmap class provides general Save methods that accept the container format as an argument. C1Bitmap also provides separate SaveAs methods for each of the supported container formats.
The following code illustrates loading and saving an arbitrary image on button clicks. The code example uses OpenFileDialog and SaveFileDialog to access an arbitrary image file kept anywhere on the user's machine. To know how an image can be loaded from a stream object, see the Quick start section.
Partial Public Class MainWindow
Inherits Window
'Initializing bitmap as a global variable
Dim bitmap As New C1Bitmap()
'Event to load an arbitrary image into the image control on button click
Private Sub Button_Click(sender As Object, e As RoutedEventArgs)
Dim ofd = New OpenFileDialog()
ofd.Filter = "Image Files|*.ico;*.bmp;*.gif;" +
"*.png;*.jpg;*.jpeg;*.jxr;*.tif;*.tiff"
If ofd.ShowDialog().Value Then
bitmap.Load(ofd.FileName,
New FormatConverter(PixelFormat.Format32bppPBGRA))
Image.Source = bitmap.ToWriteableBitmap()
Image.Width = bitmap.PixelWidth
Image.Height = bitmap.PixelHeight
End If
End Sub
'Event to save the image to a file on button click
Private Sub Button_Click_1(sender As Object, e As RoutedEventArgs)
Dim sfd As New SaveFileDialog()
sfd.Filter = "Png Files (*.png)|*.png"
sfd.CheckPathExists = True
If sfd.ShowDialog().Value Then
bitmap.Save(sfd.FileName, ContainerFormat.Png)
End If
End Sub
End Class
public partial class MainWindow : Window
{
//Defining a global variable for bitmap
C1Bitmap bitmap;
public MainWindow()
{
InitializeComponent();
//Initializing a bitmap
bitmap = new C1Bitmap();
}
//Event to load an arbitrary image into the image control on button click
private void Button_Click(object sender, RoutedEventArgs e)
{
var ofd = new OpenFileDialog();
ofd.Filter = "Image Files|*.ico;*.bmp;*.gif;" +
"*.png;*.jpg;*.jpeg;*.jxr;*.tif;*.tiff";
if (ofd.ShowDialog().Value)
{
bitmap.Load(ofd.FileName, new
FormatConverter(PixelFormat.Format32bppPBGRA));
image.Source = bitmap.ToWriteableBitmap();
image.Width = bitmap.PixelWidth;
image.Height = bitmap.PixelHeight;
}
}
//Event to save the image to a file on button click
private void Button_Click_1(object sender, RoutedEventArgs e)
{
SaveFileDialog sfd = new SaveFileDialog();
sfd.Filter = "Png Files (*.png)|*.png";
sfd.CheckPathExists = true;
if (sfd.ShowDialog().Value)
{
bitmap.Save(sfd.FileName, ContainerFormat.Png);
}
}
}
