C# 委託例子

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兩個子視窗向一個主視窗發送資訊

主視窗：

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 WindowsFormsApplication1{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();            Form2 fm2 = new Form2();            fm2.msgSender = this.Receiver; //[3]將委派物件和方法關聯            fm2.Show();            Form3 fm3 = new Form3();            fm3.msgSender = this.Receiver; //[3]將委派物件和方法關聯            fm3.Show();        }        //[2]根據委託定義方法完成資料傳遞        public void Receiver(string info)        {            this.label2.Text = info;        }       }        //[1]聲明委託，一般定義在外面        public delegate void ShowInfo(string param);}

 

子視窗1：

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 WindowsFormsApplication1{    public partial class Form2 : Form    {        public Form2()        {            InitializeComponent();        }        //建立委派物件        public ShowInfo msgSender;        //通過委託傳遞資料        private void button1_Click(object sender, EventArgs e)        {            msgSender(this.textBox1.Text);        }     }}

 

子視窗2：

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 WindowsFormsApplication1{    public partial class Form3 : Form    {        public Form3()        {            InitializeComponent();        }        //建立委派物件[從到主]        public ShowInfo msgSender;        private void button1_Click(object sender, EventArgs e)        {            msgSender(this.textBox1.Text);        }             }}

 

C# 委託例子