private void button1_Click(object sender, EventArgs e)
{
var myView = new MyView();
var source = PresentationSource.FromVisual(myView);
var dpi = source != null ? source.CompositionTarget.TransformToDevice.M11 * 96 : 96;
var visualSize = new System.Windows.Size(Width, Height);
var canvas = new Canvas()
{
Background = new SolidColorBrush(Colors.White)
};
canvas.Children.Add(myView);
canvas.Measure(visualSize);
canvas.Arrange(new Rect(visualSize));
canvas.UpdateLayout();
myView.Measure(visualSize);
myView.Arrange(new Rect(visualSize));
myView.UpdateLayout();
var tgt = new RenderTargetBitmap((int)Width, (int)Height, dpi, dpi, PixelFormats.Pbgra32);
tgt.Render(canvas);
var enc = new JpegBitmapEncoder();
enc.QualityLevel = 80;
enc.Frames.Add(BitmapFrame.Create(tgt));
var sfd = new SaveFileDialog();
if (sfd.ShowDialog() == DialogResult.OK)
{
using (var stream = sfd.OpenFile()) {
enc.Save(stream);
}
}
}