如何从父表单中检索值并在我的子表单中使用它 [英] How Do I Retrieve Value From A Parent Form And Use It In My Child Form

问题描述

Form1.cs中 - >填写你的详细信息，有一个提交按钮

Form2.cs - >有一个web浏览器控件，每次文件完成事件发生时从form1填写一个值



当我按下Form1.cs中的提交按钮并导航到url时，我所做的是创建Form2.cs的一个实例。现在我想用Form1.cs中的文本框中的值填充url输入fiels！编写Form1.textBox1.Text没有帮助!!

Form1.cs--> fill up your details,has a submit button
Form2.cs-->has a web browser control,each time document completed event occurs fills a value from form1

What i have done is created an instance of Form2.cs when submit button in Form1.cs is pressed and navigated to a url. Now i want to fill the url input fiels with values from textboxes in Form1.cs ! Writing Form1.textBox1.Text didnt help!!

推荐答案

这是关于表单协作的热门问题。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

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

将数据从一个Form传递到另一个Form的任务很简单，有几种众所周知的方法，包括使用谢尔盖作为首选的接口，这是一个优秀，经过验证的技术，掌握作为一名程序员，你将获得许多其他好处。



CodeGject上的OriginalGriff有一系列的三篇文章，展示了实现这一目标的其他方法;这是第1部分，它与其他两篇文章有关：[ ^ ]。



您选择的技术可能基于所需的数据传输顺序（工作流程）。 ..一次性项目，或一次性......或者，要发送的信息量，涉及的数据类型。如果你要传输一堆文本数据，这是一回事;如果你希望传递另一个复杂对象（类，结构等）的实例。



但是，获取您现在可以访问的数据的任务将Form2放入当前打开的网页中的URL字段是一项比较困难的任务。



是您要在网页上插入数据的网页 - 你创建并控制过的页面？

The task of passing data from one Form to another is simple, and there are several well known ways to do it, including the use of Interface as preferred by Sergey, which is an excellent, and proven, technique,mastery of which will have many other benefits to you as a programmer.

OriginalGriff here on CodeProject has a series of three articles that demonstrate other ways to achieve this; this is Part 1, which has links to the other two articles: [^].

Your choice of technique might be based on the required sequence of transmission of data (workflow) ... item-at-a-time, or all-at-once ... or, the volume of information to be sent, the data Types involved. If you are transmitting a bunch of text-data, that's one thing; if you wish to pass instances of complex objects (Classes, Structs, etc.) that's another.

However, the task of getting the data you now have access to on Form2 into the URL fields in the currently opened web-page is the more difficult task here.

Is the web-page where you want to insert the data a web-page you have created and have control over ?

由于这个问题非常受欢迎，我以前的答案往往不太清楚，可能还不够清楚，我决定写一篇提示/技巧文章，附有详细的代码示例和解释：回答了很多问题一次 - Windows窗体或WPF Windows之间的协作。

-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

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