如何在表单之间共享事件处理程序 [英] How to share an event handler between forms

问题描述

我有一个Form1.button1和Form2.button1.我希望两个按钮在单击时共享相同的事件处理程序.请参阅form2.button1_Click事件处理程序中的注释.

I have a Form1.button1 and Form2.button1. I would like to have both buttons share the same event handler for when they are clicked. See comments in the form2.button1_Click event handler.

Form1

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        textBox1.Text = "Hello World";
    }

    private void button2_Click(object sender, EventArgs e)
    {
        Form2 form2 = new Form2(this);
        form2.Show();
    }
}

Form2

public partial class Form2 : Form
{
    Form1 form1;
    public Form2(Form1 form1)
    {
        InitializeComponent();
        this.form1 = form1;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        // how do I get the form2.button1_Click and the form1.button1_Click 
        // to share the same event handler?
    }
}

任何有关如何在表单之间进行通信的常规资源也将不胜感激.我目前所要做的就是将变量和方法设置为public，并将表单传递给其他表单.

Any general resources for how to communicate between forms would also be greatly appreciated. All I currently know to do is set variables and methods as public and pass forms to other forms.

推荐答案

如果要将事件处理仅单源提供给一种方法，则需要更改其中一个按钮订阅事件的方式.一种快速的方法如下:

If you want to single-source the event handling to just one method, then you'll need to change how the event is subscribed to by one of the buttons. A quick way to do this is the following:

1. 在Form1中，将button1_Click() public替换为private.

2. 在Form2中，将以下行添加到构造函数中:

1. In Form1, make button1_Click() public instead of private.

2. In Form2, add the following line to the constructor:

public Form2(Form1 form1)
{
    InitializeComponent();
    this.form1 = form1;
    this.button1.Click += new EventHandler(this.form1.button1_Click);
}

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