如何打印wpf窗口而不在屏幕上显示？

Question

我有一个要求，我需要在不在屏幕上显示的情况下打印完整的表格。

我需要的是：

1. 初始化表单
2. 打印

全部未在屏幕上显示。

有什么建议吗？

Answer 1

您可以使用PrintDialog.PrintVisual方法执行此操作。

var capabilities = printDlg.PrintQueue.GetPrintCapabilities(printDlg.PrintTicket);

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

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

// Get the size of the printer page
var 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(visual, String.Empty);