所以,I have imported the canvas into a png file.
保存画布的代码是:
private void CommandBinding_Executed(object sender, RoutedEventArgs e)
{
Rect rect = new Rect(canvas1.RenderSize);
RenderTargetBitmap rtb = new RenderTargetBitmap((int)rect.Right,
(int)rect.Bottom, 96d, 96d, System.Windows.Media.PixelFormats.Default);
rtb.Render(canvas1);
//endcode as PNG
Microsoft.Win32.SaveFileDialog dl1 = new Microsoft.Win32.SaveFileDialog();
dl1.FileName = "Sample Image";
dl1.DefaultExt = ".png";
dl1.Filter = "Image documents (.png)|*.png";
Nullable<bool> result = dl1.ShowDialog();
if (result == true)
{
string filename = dl1.FileName;
BitmapEncoder pngEncoder = new PngBitmapEncoder();
pngEncoder.Frames.Add(BitmapFrame.Create(rtb));
//save to memory stream
System.IO.MemoryStream ms = new System.IO.MemoryStream();
pngEncoder.Save(ms);
ms.Close();
System.IO.File.WriteAllBytes(filename, ms.ToArray());
Console.WriteLine("Done");
}
}
现在I want to import an image (png file) back to canvas in my application,
即。将png图像打开到WPF画布中。
请转发c#
代码,该代码可以将任何图像文件导入到WPF中的画布中。
答案 0 :(得分:3)
我相信这就是你要找的东西?
ImageBrush brush = new ImageBrush();
brush.ImageSource = new BitmapImage(new Uri(@"mypictures\savedimage.png", UriKind.Relative));
canvas.Background = brush;
答案 1 :(得分:2)
感谢Krishna,最好的解决方案是:
private void Open_Image(object sender, RoutedEventArgs e)
{
Microsoft.Win32.OpenFileDialog dl1 = new Microsoft.Win32.OpenFileDialog();
dl1.FileName = "MYFileSave";
dl1.DefaultExt = ".png";
dl1.Filter = "Image documents (.png)|*.png";
Nullable<bool> result = dl1.ShowDialog();
if (result == true)
{
string filename = dl1.FileName;
ImageBrush brush = new ImageBrush();
brush.ImageSource = new BitmapImage(new Uri(@filename, UriKind.Relative));
canvas1.Background = brush;
}
}