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应一个页面并且它能很好地完成工作。问题是，在我打印出我想要的内容之后，该方法缩减了我的wpf-control，这是一个带有图表的组合框。如何将组框的大小缩放回缩放前的大小？

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

找到答案！只需将objecToPrint替换为您的对象即可。在我的情况下，这将是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));

打印缩放我的WPF-GroupBox

1 个答案: