[转]c#中在一个窗体中触发另一个窗体的事件

时间:2022-08-30 21:23:06


创建两个窗体,分别为form1,form2,在form1中添加控件textBox1和button1,创建一个form2的对象Form2 b = null;
在form2中添加button1,定义委托和事件
 //定义委托
        public delegate void MyDelegate();
        //定义事件
        public event MyDelegate MyEvent;
给form2中的button1添加消息相应函数并做修改  
     private void button1_Click(object sender, EventArgs e)
        {
            if (MyEvent != null)
                MyEvent();//引发事件
            this.Close();
        }
在form1的代码中添加函数
     void b_MyEvent()
            {
                this.textBox1.Text += "已单击b窗体按钮\r\n";
            }
修改form1的构造函数
     public Form1()
            {
                InitializeComponent();
                b = new Form2();//实例化b窗体
                b.MyEvent += new Form2.MyDelegate(b_MyEvent);//监听b窗体事件
            }
为form1中的button1添加消息响应函数
    private void button1_Click(object sender, EventArgs e)
            {
                b.ShowDialog();

            }
这样当单击form1中的按钮时会弹出form2,当单击form2中的按钮时,form1中的textbox1会显示“已单击b窗体按钮”。
具体代码如下(vs 2005实现):

form1代码:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace form1
{

        public partial class Form1 : Form
        {
            Form2 b = null;

            public Form1()
            {
                InitializeComponent();

                b = new Form2();//实例化b窗体
                b.MyEvent += new Form2.MyDelegate(b_MyEvent);//监听b窗体事件
            }


            void b_MyEvent()
            {
                this.textBox1.Text += "已单击b窗体按钮\r\n";
            }

            private void button1_Click(object sender, EventArgs e)
            {
                b.ShowDialog();

            }
}
}

form2代码:

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace form1
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }
        //定义委托
        public delegate void MyDelegate();
        //定义事件
        public event MyDelegate MyEvent;

        private void button1_Click(object sender, EventArgs e)
        {
            if (MyEvent != null)
                MyEvent();//引发事件
            this.Close();
        }

    }
}

文章来源:http://blog.163.com/liujiyun123@126/blog/static/4459677620108295850128/