将WPF InkCanvas保存到JPG-图像将被剪切

啊哈!问题是文本块 TXTLAMP 就在画布的正上方。当你移除黑线时,黑线就消失了。

至于为什么会这样,我还不完全确定。

我也有同样的问题,我是这样做的……它在这里起作用。

    private void Button_Click(object sender, RoutedEventArgs e)
    {           
        double width = inkSig.ActualWidth;
        double height = inkSig.ActualHeight;
        RenderTargetBitmap bmpCopied = new RenderTargetBitmap((int)Math.Round(width), (int)Math.Round(height), 96, 96, PixelFormats.Default);
        DrawingVisual dv = new DrawingVisual();
        using (DrawingContext dc = dv.RenderOpen())
        {
            VisualBrush vb = new VisualBrush(inkSig);
            dc.DrawRectangle(vb, null, new Rect(new System.Windows.Point(), new System.Windows.Size(width, height)));
        }
        bmpCopied.Render(dv);
        System.Drawing.Bitmap bitmap;
        using (MemoryStream outStream = new MemoryStream())
        {
            // from System.Media.BitmapImage to System.Drawing.Bitmap 
            BitmapEncoder enc = new BmpBitmapEncoder();
            enc.Frames.Add(BitmapFrame.Create(bmpCopied));
            enc.Save(outStream);
            bitmap = new System.Drawing.Bitmap(outStream);
        }

        EncoderParameter qualityParam =
     new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 85L);

        // Jpeg image codec
        ImageCodecInfo jpegCodec = getEncoderInfo("image/jpeg");

        if (jpegCodec == null)
            return;

        EncoderParameters encoderParams = new EncoderParameters(1);
        encoderParams.Param[0] = qualityParam;
        Bitmap btm = new Bitmap(bitmap);
        bitmap.Dispose();
        btm.Save("C:\\Users\\Pd\\Desktop\\dfe12.jpg", jpegCodec, encoderParams);
        btm.Dispose(); 
    }

    private ImageCodecInfo getEncoderInfo(string mimeType)
    {
        // Get image codecs for all image formats
        ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();

        // Find the correct image codec
        for (int i = 0; i < codecs.Length; i++)
            if (codecs[i].MimeType == mimeType)
                return codecs[i];
        return null;
    } 

我的班级保存图像

     using System;
     using System.IO;
     using System.Windows;
     using System.Windows.Controls;
     using System.Windows.Media;
     using System.Windows.Media.Imaging;

     public void ExportToJpeg(String path,  InkCanvas surface)
    {
        double
                x1 = surface.Margin.Left,
                x2 = surface.Margin.Top,
                x3 = surface.Margin.Right,
                x4 = surface.Margin.Bottom;

        if (path == null) return;

        surface.Margin = new Thickness(0, 0, 0, 0);

      Size size = new Size(surface.Width, surface.Height);
   surface.Measure(size);
   surface.Arrange(new Rect(size));

         RenderTargetBitmap renderBitmap =
          new RenderTargetBitmap(
            (int)size.Width,
            (int)size.Height,
            96,
            96,
            PixelFormats.Default);
      renderBitmap.Render(surface);
      using (FileStream fs = File.Open(path, FileMode.Create))
        {
         JpegBitmapEncoder encoder = new JpegBitmapEncoder();
            encoder.Frames.Add(BitmapFrame.Create(renderBitmap));
            encoder.Save(fs);
        }
      surface.Margin = new Thickness(x1, x2, x3, x4);
    }

杰森我解决了这个问题。 对不起,我的英语。我是俄国人。 需要设置InkCanvas属性。边距为0,0,0,0 那个 表面.边缘=新厚度(0,0,0,0); 在你的位置保存了设定的利润之后

Expple: 我纳威

表面.边缘=新厚度(0,0,0,0); http://img189.imageshack.us/img189/7499/mynewimage.png

和 表面.边缘=新厚度(55,40,96,5); http://img519.imageshack.us/img519/7499/mynewimage.png

  var size = new Size(inkCanvas.ActualWidth, inkCanvas.ActualHeight);
    inkCanvas.Margin = new Thickness(0, 0, 0, 0);

    inkCanvas.Measure(size);
    inkCanvas.Arrange(new Rect(size));
    var encoder = new PngBitmapEncoder();
    var bitmapTarget = new RenderTargetBitmap((int)size.Width, (int)size.Height, 96, 96, PixelFormats.Default);
    bitmapTarget.Render(inkCanvas);
    encoder.Frames.Add(BitmapFrame.Create(bitmapTarget));
    encoder.Save(ms); 

我一直在网上寻找这个问题的答案,并毫无喜悦地尝试了大多数意见。然后我试了一下,结果成功了!

<Canvas x:Name="editCanvas" Background="Transparent" ClipToBounds="True">
        <InkCanvas EditingMode="Select" x:Name="inkCanvas"  Background="Transparent" Height="562" Width="866">

        </InkCanvas>
</Canvas>