如何打印 wpf 窗口而不在屏幕上显示它? [英] How to print a wpf window without showing it on the screen?

问题描述

我有一个要求，我需要打印一份完整的表格，但不显示在屏幕上.

I have a requirement where I need to print a complete form without showing it on screen.

我需要的是:

1. 初始化表单
2. 打印

一切都没有显示在屏幕上.

All without showing on the screen.

请问有什么建议吗?

推荐答案

您可以使用 PrintDialog.PrintVisual 方法执行此操作.

You can do this using PrintDialog.PrintVisual method.

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);

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