WPF 打印

1、

 

System.Windows.Controls.PrintDialog printDialog = new System.Windows.Controls.PrintDialog();
if (printDialog.ShowDialog() == true)
{

string doc =
"茶位费 3.00 1 3.00\n" +
"基围虾 0.00 1 0.00\n" +
"火爆肥肠 38.00 1 38.00\n";

Run run = new Run(doc);
TextBlock visual = new TextBlock();
visual.Inlines.Add(run);
visual.Margin = new Thickness(20, 5, 5, 5);
visual.TextWrapping = TextWrapping.Wrap;
visual.LayoutTransform = new ScaleTransform(1, 1);
Size pageSize = new Size(printDialog.PrintableAreaWidth, printDialog.PrintableAreaHeight);
visual.Measure(pageSize);
visual.Arrange(new Rect(0, 0, pageSize.Width, pageSize.Height));
printDialog.PrintVisual(visual, "doc");

}

 

2、

System.Windows.Controls.PrintDialog printDialog = new System.Windows.Controls.PrintDialog();
if (printDialog.ShowDialog() == true)
{

Run run = new Run("this is sad story!");

TextBlock visual = new TextBlock();
visual.Inlines.Add(run);

visual.Margin = new Thickness(15);

visual.TextWrapping = TextWrapping.Wrap;
visual.LayoutTransform = new ScaleTransform(5, 5);

Size pageSize = new Size(printDialog.PrintableAreaWidth, printDialog.PrintableAreaHeight);
visual.Measure(pageSize);

visual.Arrange(new Rect(0, 0, pageSize.Width, pageSize.Height));

printDialog.PrintVisual(visual, "A Scaled Drawing");

}

 

3、

WPF 中保存 window(窗口)或者canvas成图片

 

最近需要用到这个功能,搜了一下不少代码有问题 ,找到一个效果比较好的，支持多级子元素 记一下.

private void button_save_window_Click(object sender, RoutedEventArgs e)
        {

            util.SaveWindow(this,96,"d:\\window.png");
        }

        private void button_save_canvas_Click(object sender, RoutedEventArgs e)
        {

            util.SaveCanvas(this,this.canvas1, 96, "d:\\canvas.png");
        }
    }

    public static class util
    {
        public static void SaveWindow(Window window, int dpi, string filename)
        {

            var rtb = new RenderTargetBitmap(
                (int)window.Width, //width
                (int)window.Width, //height
                dpi, //dpi x
                dpi, //dpi y
                PixelFormats.Pbgra32 // pixelformat
                );
            rtb.Render(window);

            SaveRTBAsPNG(rtb, filename);

        }

        public static void SaveCanvas(Window window, Canvas canvas, int dpi, string filename)
        {
            Size size = new Size(window.Width , window.Height );
            canvas.Measure(size);
            //canvas.Arrange(new Rect(size));

            var rtb = new RenderTargetBitmap(
                (int)window.Width, //width
                (int)window.Height, //height
                dpi, //dpi x
                dpi, //dpi y
                PixelFormats.Pbgra32 // pixelformat
                );
            rtb.Render(canvas);

            SaveRTBAsPNG(rtb, filename);
        }

        private static void SaveRTBAsPNG(RenderTargetBitmap bmp, string filename)
        {
            var enc = new System.Windows.Media.Imaging.PngBitmapEncoder();
            enc.Frames.Add(System.Windows.Media.Imaging.BitmapFrame.Create(bmp));

            using (var stm = System.IO.File.Create(filename))
            {
                enc.Save(stm);
            }
        }