如何在control1或form1中从class2触发事件？ [英] How do I fire event from class2 in either control1 or form1 ?

问题描述

我有Class2，Form1和Control1。

I have Class2, Form1 and Control1.

class Class2
{

    public int number = 0;
    public string name = "X";

    public event EventHandler DataAvailable;
    public void OnDataAvailable(EventArgs e)
    {
        if (DataAvailable != null) DataAvailable(this, e);
    }
}

1-当我按下Control1中的按钮时，我更新'在Class2中的数字'。

2-当我按下Form1中的按钮时，我在Class2中更新'number'。

3-每次从任一控件（Form1或Control1）按下按钮时，都会触发Class2中的事件。并且正在两个控件中更新label1，并且来自任一控件的label1显示来自Class2的数字。

清除为泥浆？



如何我可以这样做吗？由于Class2必须是Form1或Control1中的对象，但不能同时是两者，因为它将是2个对象。另外，没有使Class2静止。



谢谢。



我尝试过：



a自2005年以来很多东西......................... .........

1- When I press a button in Control1, i update 'number' in Class2.
2- When I press a button in Form1, i update 'number' in Class2.
3- The event from Class2 is fired every time when a button is pressed from either controls(Form1 or Control1) ; and is updating label1, also in both controls, and label1 from either controls is showing number from Class2.
Clear as mud?

How can I do this? Since Class2 must be an object in Form1 OR Control1, but not both since it will be 2 objects. Also, without making Class2 static.

Thank you.

What I have tried:

a lot of stuff since 2005..................................

推荐答案

您可以在Class2中创建一个公共方法来触发事件，并从其他位置调用它。



或者将数字设为一个属性 - 无论如何，公共字段通常是一个坏主意 - 并且在设置器中更改时即可触发。



但说实话，这听起来像是你到达那里的屁股倒退设计。

You can create a public method in Class2 which fires the event, and call it from the other locations.

Or make number a property - which it should be anyway, public fields is generally a bad idea - and fire the even when it is changed in the setter.

But to be honest, that does sound like an ass-backwards design you got there.

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