如何将子窗口格式文本框值传递给父窗口窗体文本框 [英] How to pass child window form text box value to parent window form textbox

问题描述

您好我在Windows窗体应用程序中有疑问，



当我按下父窗口中的按钮时，子窗口窗体正在打开。并且我将父窗口的文本框值传递给子窗口窗体。但当我关闭子窗口时，我想将子窗口变量传递给父窗口文本框



你有什么可以帮助我？

解决方案

首先，这些表单中没有一个是另一个表单的父表单。请参阅我过去的回答：父子表单关系 [ ^ ]。



现在，关于你的问题。这是关于表单协作的流行问题。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 [ ^ ]。

-SA

这一点都不难，请看这里：在两种形式之间转移信息，第2部分：儿童到父母 [<小时ef =http://www.codeproject.com/Tips/548131/Transferring-information-between-two-forms-Part-2target =_ blanktitle =New Window> ^ ]

Hi i have a doubt in windows form application,

when i pressing button in parent window the child window form is opening. and i passed text box value of parent window to child window form. but when i closing the child window i want to pass the child window variable to parent window text box

How is possible can you help me ??

解决方案

First of all, none of those forms is a parent for another one. Please see my past answer: Parent Child Form Relationship[^].

Now, about your question. 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[^].

—SA

It's not difficult at all, see here: Transferring information between two forms, Part 2: Child to Parent[^]

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