C# 事件传值应用于窗口传值

Winform程序代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
/*
 事件传值总结：
 准备工作：首先声明一个类MyEventArgs继承EventArgs，该类存储传的值，因为事件的参数是EventArgs
 首先声明一个事件，然后注册事件，其中要写上事件处理方法，其他方法触发事件的时候调用该处理方法
 触发事件时将MyEventArgs的对象传给事件处理方法
 */
namespace 事件传值复习
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        public event EventHandler evt;
        Form2 form2 = new Form2();
        MyEventArgs mea = new MyEventArgs();
        private void btnFirst_Click(object sender, EventArgs e)
        {
            this.evt += new EventHandler(form2.SetText);//注册事件
            form2.Show();
        }

        private void btnValue_Click(object sender, EventArgs e)
        {
            mea.Text = textBox1.Text;
            this.evt(this,mea);
        }
    }
}
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace 事件传值复习
{
    public partial class Form2 : Form
    {
        public Form2()
        {
            InitializeComponent();
        }
        public void SetText(object sender, EventArgs e)
        {
            MyEventArgs mea = e as MyEventArgs;
            txtbox2.Text = mea.Text;
        }
    }
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 事件传值复习
{
    public class MyEventArgs:EventArgs
    {
        private string text;

        public string Text
        {
            get
            {
                return text;
            }

            set
            {
                text = value;
            }
        }
    }
}