如何创建可以被两个窗口访问的对象实例 [英] how to create an object instance that could be accessed by two windows

问题描述

在我的wpf应用程序中，我有窗口1，窗口2和一个单独的类文件share.cs，其中包含公共整数变量"a".

每个窗口中都有一个文本框和一个按钮.

在window1的按钮上，我执行以下操作

Window1.cs

In my wpf application, I have window 1, window 2, and a separate class file called share.cs with a public integer variable ''a''

I have a textbox and a button in each of the windows.

on the button in window1, i perform the following operation

Window1.cs

private void button1_Click(object sender, RoutedEventArgs e)
       {
           share s = new share();

          s.a =  Convert.ToInt32(textBox1.Text);
          Window2 win = new Window2();
          win.Show();

       }

基本上，我只想将window1上文本框中的值复制到share类中的变量中，然后显示window2.

现在，在window2中，当我单击window2中的按钮时，我想从共享类的变量"a"中检索值，并希望将其显示在window2的文本框中.而且据我了解，window1中的实例``s''与window2的实例不同，这就是为什么我无法正确获取输出的原因.
Window2.cs

Basically, i just want to copy the value from textbox on window1 into the variable in share class, and then display the window2.

Now, In window2, I would like to retrieve the value from variable ''a'' in share class and would like to display it on the textbox in window2, when i click on the button in window2. AND it is my understanding that the instance ''s'' in window1 is different from that of window2, and that is the reason why i am not getting the output correctly.

Window2.cs

private void button1_Click(object sender, RoutedEventArgs e)
        {
            share s = new share(); 
            textBox1.Text = Convert.ToString(s.a);
        }

无论如何，我可以创建一个公共实例并在两个类中使用它吗?如果是这样，我应该在哪里创建实例并使其对两个窗口都可用?我只希望两个窗口都使用同一实例在共享类中使用变量"a".
这就是我在share.cs中拥有的东西.

Is there anyway, that I could create a single common instance and use it in both the classes ? If so, where should I create the instance and make it available to both the windows ? i just want both the windows to use the variable ''a'' in share class using same instance.
This is what I have in share.cs.

public class share
    {
       public int a;
    }

我是一个学习者，请直接回答.没有建议.任何帮助将不胜感激.谢谢. :)

I am a learner and I need direct answers please; not suggestions. Any help would be truly appreciated. Thanks. :)

推荐答案

可以认为是好的设计的最简单方法是使用Form的属性.

还有其他与数据绑定和依赖属性有关的可能性，但是我对WPF的使用还不多，所以我还是用WinForms的方式做一些事情...

1)在Window2中添加属性

The easiest way that could be considered a good design would uses properties of the Form.

There are other possibilities related to data binding and depedency properties but I haven''t played much with WPF yet so I still do some things the WinForms way...

1) Add a property in Window2

// Window2.cs
public int A { get; set; }

2)并在click处理程序中设置that属性:

2) And the set that property in the click handler:

// Window.cs
private void button1_Click(object sender, RoutedEventArgs e)
{
    Window2 win = new Window2();
    win.A = Convert.ToInt32(textBox1.Text);
    win.Show();
}

3)单击第二种形式的按钮时获取数据:

3) And the get the data when the button in the second form is clicked:

// Window2.cs
private void button1_Click(object sender, RoutedEventArgs e)
{
    textBox1.Text = Convert.ToString(A);
}

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