c# - 打印缩放我的 WPF-GroupBox

Question

我正在尝试从我的 wpf 应用程序中打印出一些信息。我找到了一些代码来制作我想要打印的内容以适合一页并且它可以很好地完成这项工作。问题是，在我打印出我想要的内容后，该方法缩小了我的 wpf 控件，它是一个带有图表的组框。如何将 groupbox 的大小缩放回缩放之前的大小？

private void PrintUT_Click(object sender, RoutedEventArgs e)
    {
        PrintDialog printDlg = new System.Windows.Controls.PrintDialog();
        if (printDlg.ShowDialog() == true)
        {
            //get selected printer capabilities
            System.Printing.PrintCapabilities capabilities = printDlg.PrintQueue.GetPrintCapabilities(printDlg.PrintTicket);

            //get scale of the print wrt to screen of WPF visual
            double scale = Math.Min(capabilities.PageImageableArea.ExtentWidth / this.GBProsjektTimer.ActualWidth, capabilities.PageImageableArea.ExtentHeight /
                           this.GBProsjektTimer.ActualHeight);

            //Transform the Visual to scale
            this.GBProsjektTimer.LayoutTransform = new ScaleTransform(scale, scale);

            //get the size of the printer page
            Size sz = new Size(capabilities.PageImageableArea.ExtentWidth, capabilities.PageImageableArea.ExtentHeight);

            //update the layout of the visual to the printer page size.
            this.Measure(sz);
            this.Arrange(new Rect(new Point(capabilities.PageImageableArea.OriginWidth, capabilities.PageImageableArea.OriginHeight), sz));

            //now print the visual to printer to fit on the one page.
            printDlg.PrintVisual(this.GBProsjektTimer, "First Fit to Page WPF Print");
        }
    }

Answer 1

找到了答案！只需将 objecToPrint 替换为您的对象即可。在我的情况下，那将是this.GBProsjektTimer.Width = double.Nan

                    objectToPrint.Width = double.NaN;
                objectToPrint.UpdateLayout();
                objectToPrint.LayoutTransform = new ScaleTransform(1, 1);
                Size size = new Size(capabilities.PageImageableArea.ExtentWidth, 
                                     capabilities.PageImageableArea.ExtentHeight);
                objectToPrint.Measure(size);
                objectToPrint.Arrange(new Rect(new Point(capabilities.PageImageableArea.OriginWidth, 
                                      capabilities.PageImageableArea.OriginHeight), size));