使用Microsoft Print to PDF将文件保存在预定义路径上

Question

我正在使用 Microsoft Print to PDF 打印我的画布。现在我要求从可用打印机列表中选择Microsoft Print to PDF然后显示FileSaveDialog本身我不想显示它而不是我想在预定义路径上保存该PDF文件。下面是我用于打印画布的代码：

 public void RenderCanvasImage(int maxRight, int maxBottom, Canvas surface, Transform transform)
        {
            RenderTargetBitmap renderBitmap = new RenderTargetBitmap(maxRight, maxBottom, 96d, 96d, PixelFormats.Pbgra32);
            renderBitmap.Render(surface);
            PrintDialog dialog = new PrintDialog();
            if (dialog.ShowDialog() != true)
            {
                return;
            }
            dialog.PrintQueue = new System.Printing.PrintQueue(new System.Printing.PrintServer() {  }, "Microsoft Print to PDF");

            Grid grid = new Grid();
            Image myImage = new Image();
            myImage.Source = renderBitmap;
            myImage.Stretch = Stretch.Uniform;
            grid.Children.Add(myImage);
            Grid.SetColumn(myImage, 0);
            Grid.SetRow(myImage, 1);
            var pqueue = dialog.PrintQueue;
            grid.Measure(new Size(dialog.PrintableAreaWidth, dialog.PrintableAreaHeight));
            grid.Arrange(new Rect(new Point(0, 0), grid.DesiredSize));
            dialog.PrintVisual(grid, "My Canvas");
            surface.LayoutTransform = transform;

        }

任何人都可以建议任何解决方案如何在预定义的路径上保存文件。

先谢谢