将XAML文件转换为BitmapImage
我想从XAML (文本)文件创建具有所需分辨率的BitmapImage 。 我怎样才能做到这一点?
谢谢。
要加载Xaml文件:
Stream s = File.OpenRead("yourfile.xaml"); Control control = (Control)XamlReader.Load(s);
并创建BitmapImage:
public static void SaveImage(Control control, string path) { using (MemoryStream stream = new MemoryStream()) { GenerateImage(element, stream); Image img = Image.FromStream(stream); img.Save(path); } } public static void GenerateImage(Control control, Stream result) { //Set background to white control.Background = Brushes.White; Size controlSize = RetrieveDesiredSize(control); Rect rect = new Rect(0, 0, controlSize.Width, controlSize.Height); RenderTargetBitmap rtb = new RenderTargetBitmap((int)controlSize.Width, (int)controlSize.Height, IMAGE_DPI, IMAGE_DPI, PixelFormats.Pbgra32); control.Arrange(rect); rtb.Render(control); PngBitmapEncoder png = new PngBitmapEncoder(); png.Frames.Add(BitmapFrame.Create(rtb)); png.Save(result); } private static Size RetrieveDesiredSize(Control control) { control.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity)); return control.DesiredSize; }
确保包含正确的库! 这些类位于System.Windows.Media
。
希望这可以帮助!