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如何为不公开PrintDocument对象的C＃对象实现打印预览功能？

[英]How can I implement a Print Preview function for a C# object that doesn't expose a PrintDocument object?

原文 2009-10-21 10:52:28 2 2 c#/ printing/ ocx

[Disclaimer: I looked at the related questions and could only find relevant material for MFC. [免责声明：我查看了相关问题，只能找到与MFC相关的材料。 I don't do C++] 我不做C ++]

I've got a C# .Net app that uses a OCX control via interop (the control being a viewer component for CGM images). 我有一个C＃.Net应用程序，该应用程序通过互操作使用OCX控件（该控件是CGM图像的查看器组件）。 The control exposes a Print() and PrintSetup() method but not a PrintPreview() method. 该控件公开一个Print（）和PrintSetup（）方法，但不公开一个PrintPreview（）方法。

There's also no exposed PrintDocument object that I can use to implement this functionality. 也没有可用于实现此功能的公开PrintDocument对象。

Are there any other ways in which I can redirect to a Print Preview dialog? 还有其他方法可以重定向到“打印预览”对话框吗？

[More info]In case it helps someone answer, the control in question is the Larson CGM Viewer ActiveX, also referred to as VisEx CGM. [更多信息]如果它可以帮助某人回答，则有问题的控件是Larson CGM Viewer ActiveX，也称为VisEx CGM。 See http://www.cgmlarson.com/industry/cgm_viewer_control.php 参见http://www.cgmlarson.com/industry/cgm_viewer_control.php

2 个解决方案

您可以使用OCX控件将CGM图像作为临时文件保存到临时位置，然后使用winforms内置的PrintPreviewControl功能吗？

In the end I spoke to the vendor - they have a desktop product that they use their own control in (aka eating their own dogfood) and even they don't have Print Preview functionality. 最后，我与供应商交谈-他们有一个台式机产品，他们使用自己的控件（也就是吃自己的狗粮），甚至没有打印预览功能。

I'm not gonna jump through hoops to get a feature even the vendor doesn't provide or support - much as I hate telling end users something can't be done. 即使供应商不提供或支持，我也不会跳过以获得功能，这就像我讨厌告诉最终用户无法完成的事情一样。