如何从主窗体C＃中的对话框访问子窗体 [英] How do I access a Child Form from a Dialog from the Main Form C#

问题描述

我做了一个绘画程序。主要形式是Form1。一个名为FormCanvas的子窗体有一个带有位图图像的pictureBox，我在其上完成所有绘图。从主Form1，用户可以调出几个对话框来更改图像亮度，对比度等。现在这些对话框设置了缩略图预览窗口，以便用户可以看到更改的样子，但我想要在实际图像上进行更改。如何从这样的DIalog访问该位图？

解决方案

不要。将信息传递给主表单并让它完成工作。

在两个表格之间传递信息，第2部分：儿童到父母 [ ^ ]

这是一个想法：谁需要MDI？为什么要折磨自己并吓跑你的用户？

帮自己一个大忙：根本不要使用MDI。没有它，您可以更轻松地实现设计，质量更好。 MDI甚至被微软高度劝阻，事实上，微软将其从WPF中删除并且很难支持它。更重要的是，如果您使用MDI，您将吓跑所有用户。只是不要。请参阅：

http://en.wikipedia.org/wiki/Multiple_document_interface#Disadvantages [ ^ ]，

如何在WPF中创建MDI父窗口？ [ ^ ]。



我可以解释做什么。请看我过去的答案：

如何在WPF中创建MDI父窗口？ [解决方案2 ]，

关于在WPF中使用MDI窗口的问题 [ ^ ]，

麦当劳给出错误 [ ^ ]，

如何设置子窗体最大化，最后一个子窗体最小化 [ ^ ]。

-SA

I have made a paint program. The main form is Form1. A Child Form, called FormCanvas, has a pictureBox with a Bitmap Image on which I do all the drawing. From the main Form1 the user can call up several Dialogs to change the Images brightness, contrast, etc. Right now these Dialogs are set up with a thumbnail preview window, so that the user can see what the changes will look like, but I want to make the changes on the actual Image. How can I access that Bitmap from such a DIalog?

解决方案

Don't. Pass the info to the main form and let it do the work.
Transferring information between two forms, Part 2: Child to Parent[^]

Here is the idea: who needs MDI, ever? Why torturing yourself and scaring off your users?
Do yourself a great favor: do not use MDI at all. You can do much easier to implement design without it, with much better quality. MDI is highly discouraged even by Microsoft, in fact, Microsoft dropped it out of WPF and will hardly support it. More importantly, you will scare off all your users if you use MDI. Just don't. Please see:
http://en.wikipedia.org/wiki/Multiple_document_interface#Disadvantages[^],
How to Create MDI Parent Window in WPF?[^].

I can explain what to do instead. Please see my past answers:
How to Create MDI Parent Window in WPF? [Solution 2],
Question on using MDI windows in WPF[^],
MDIContainer giving error[^],
How to set child forms maximized, last childform minimized[^].

—SA

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