winform利用委托实现窗体间传值

winform利用委托实现窗体间传值

Form1:

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

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

        private void button1_Click(object sender, EventArgs e)        {            Form2 form2 = new Form2();

            //4、注册form2_MyEvent方法的MyEvent事件               form2.MyEvent += new MyDelegate(form2_MyEvent);            form2.Show();           }                /// <summary>        /// form2要求form1中要实现的事件        /// </summary>        void form2_MyEvent()        {            this.label1.Text = "证明确实是！";        }

                private void Form1_Load(object sender, EventArgs e)        {            this.label1.Text = "我是天才！";        }  

    }}

Form2:

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

namespace FormTransMessage{    //1、定义一个委托    public delegate void MyDelegate();    public partial class Form2 : Form    {        //2、定义该委托的事件           public event MyDelegate MyEvent;  

        public Form2()        {            InitializeComponent();        }

        private void button1_Click(object sender, EventArgs e)        {            //3、触发事件的地方            MyEvent();            this.Close();           }

        private void button2_Click(object sender, EventArgs e)        {            Form3 form = new Form3();            form.myevent += new Mydelegate(form3_event);            form.Show();        }

        void form3_event()        {            this.button2.Enabled = false;        }    }}

总结：利用委托来实现窗体间传值遵循如下几步即可：

1、在弹出窗体中定义委托，并定义委托的一个事件，明确触发该事件的地方；

2、在父窗体中定义相应的方法，并在实例化弹出窗体时注册该方法给弹出窗体中的事件。