如何将printdocument对象转换为位图图像 [英] How to convert printdocument object to bitmap image

问题描述

我想创建一个自定义打印预览控件，我将更改打印文档，并希望查看文档的动态渲染图像，即如果发送到打印机将打印的已更改文档。

但我不知道如何将文档呈现到图像列表（1图像/页）。



我已经搜索了现成的解决方案&发现了这个。



http://stackoverflow.com/questions/10868623/converting-print-page-graphics-to-bitmap-c-sharp



提前致谢。



我的尝试：



没什么特别的。我不知道如何将printdocument对象渲染为位图：（

I want to create a custom print preview contol like thing in which I shall change the print document and want to see the dynamicaly rendered image of the document i.e. changed document that will be printed if sent to printer.
But I donot have any idea about how to render the document to image list (1 image/page).

I have searched for ready made solutions & found this.

http://stackoverflow.com/questions/10868623/converting-print-page-graphics-to-bitmap-c-sharp

Thanks in advance.

What I have tried:

Nothing special. I have no idea how to render printdocument object to bitmap :(

推荐答案

它实际上很简单。你的打印例程有一个你通常打印的Graphics对象将输出发送到打印机时，将从打印机的设备上下文创建此Graphics对象 - 从而将输出发送到打印机。



如果创建位图然后，您可以使用白色背景和与打印机页面相同的大小，从该位图创建一个Graphics对象。如果将该Graphics对象传递给打印例程，它们将打印到您的位图而不是打印机。创建一个新的每个打印机页面的位图，调整它们以适合您的预览窗口，然后你去 - 完成所有。

Its actually quite simple to do. Your "Print" routines have a Graphics object that you normally print to. When sending the output to the printer, this Graphics object is created from the printer's device context - thus sending the output to the printer.

If you create a bitmap with a white background and the same size as your printer page, you can then create a Graphics object from that bitmap. If you pass that Graphics object to the print routines, then they will print onto your bitmap instead of the printer. Create a new bitmap for each printer page, resize them to fit into your preview window, and there you go - all done.

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