如何将值从DLL1传递到FORM到DLL2到FORM [英] How to Pass Value from DLL1 to FORM to DLL2 to FORM

问题描述

DLL1包含XML Stream和DLL2包含将显示XML和FORM值的UserControl将调用DLL2来显示。

DLL1 Contains XML Stream and DLL2 Contains UserControl that will Display the values of XML and FORM will call DLL2 to display.

推荐答案

这是关于表单的热门问题合作。最强大的解决方案是在表单类中实现适当的接口，并传递接口引用而不是引用Form的整个实例。有关更多详细信息，请参阅我以前的解决方案：如何以两种形式复制列表框之间的所有项目 [ ^ ]。



另请参阅此处的其他解决方案讨论。如果应用程序足够简单，解决方案就像在一个表单中声明一些 internal 属性并将对一个表单的实例的引用传递给另一个表单的实例一样简单形成。对于更复杂的项目，这种违反严格封装的样式和松散耦合可能会增加代码的意外复杂性并引发错误，因此封装良好的解决方案将是优惠。



另请参阅：

http://en.wikipedia.org/wiki/Accidental_complexity [ ^ ]，

http://en.wikipedia.org/wiki/Loose_coupling [ ^ ]。



现在，不同的DLL（在.NET中，主要单位和技术的核心点之一是程序集，而DLL或不是DLL，任何PE文件仅仅是一个或一个组件的唯一模块）几乎没有区别。如果你的程序集是通过引用它们在一个应用程序中组成的，唯一的主要区别是访问修饰符：在同一个程序集中，可访问的类型和成员可以是 public ， protected 或 internal ，而在不同的程序集中工作需要可访问的类型和成员 protected （对于派生类的成员）或 public 。

-SA

This is the popular question about form collaboration. The most robust solution is implementation of an appropriate interface in form class and passing the interface reference instead of reference to a "whole instance" of a Form. Please see my past solution for more detail: How to copy all the items between listboxes in two forms[^].

Please also see other solutions in this discussion. If the application is simple enough, the solution could be as simple as declaring of some internal property in one form and passing a reference to the instance of one form to the instance of another form. For more complex projects, such violation of strictly encapsulated style and loose coupling could add up the the accidental complexity of the code and invite mistakes, so the well-encapsulated solution would be preferable.

Please see also:
http://en.wikipedia.org/wiki/Accidental_complexity[^],
http://en.wikipedia.org/wiki/Loose_coupling[^].

Now, the different "DLLs" (in .NET, the main unit and one of the central points of technology is assembly, and DLL or not DLL, any PE file is merely one or the only module of an assembly) makes almost no difference. If your assemblies are composed in one application by referenced them, the only major difference is access modifiers: in the same assembly, accessible types and members can be public, protected or internal, while working across different assemblies requires accessible types and members to be protected (for members of derived classes) or public.

—SA

由于这个问题非常受欢迎，我以前的答案常常没有得到很好的理解，可能还不够清楚，我决定写一篇完整的提示/技巧文章，详细代码示例和解释：一次回答的许多问题 - Windows窗体或WPF之间的协作Windows 。

-SA

As the question turned out to be very popular, and my previous answers often were not well understood, probably were not clear enough, I decided to write a Tips/Trick article complete with detailed code samples and explanations: Many Questions Answered at Once — Collaboration between Windows Forms or WPF Windows.

—SA

我为两个DLL创建了实例表格中的nd流程。

感谢所有人。

I created instances to both DLL and process inside the form.
thanks to everyone .

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