我怎样才能从另一种形式中获取价值 [英] How Can I Get Value From Another Form

问题描述

Presintaion_Layer.FM_TBL_Invoice inv = new FM_TBL_Invoice（）;



this.textBox2.Text = inv.comboStore.SelectedText;

Presintaion_Layer.FM_TBL_Invoice inv = new FM_TBL_Invoice();

this.textBox2.Text = inv.comboStore.SelectedText;

推荐答案

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

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

由于这个问题非常受欢迎，我以前的答案往往不太清楚，可能还不清楚够了，我决定写一篇完整的提示/技巧文章，详细的代码示例和解释：一次回答的许多问题 - 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

让我们假设有两个form1和form2，你必须将form1上textbox的值传递给form2。

你可以通过两种方式做到这一点：

1.使用构造函数。

Hi,
Lets assume there are two form1 and form2 and you have to pass the value of textbox on form1 to form2.
You can do this by two ways:
1.Using constructor.

Class Form1
{
Form2 frm2Obj = new Form2(textbox.Text);
}

2.使用房产

2. Using Property

Class Form2
{
TextBoxValue {get; set;}
}

Class Form1
{
Form2 frmObj2 = new Form2();
Form2.TextBoxValue = textbox.Text;
}

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