如何在不显示屏幕的情况下打印wpf窗口？

Question

我有一个需求，我需要打印一个完整的窗体而不显示在屏幕上。

我需要的是：

1. 初始化形式
2. 打印

所有，而不显示在屏幕上。

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);