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POHow to use delegate and event in userControl?
 

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  1. POHow to use delegate and event in userControl?
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    <p>I have create a userControl name is UserControl1. On this usercontrol, I create a button name is btnAdd. I create 2 form name are Form1 and Form2. And then I add UserControl1 on those form. I want to when I click btnAdd button on Form1 then show string "this is form 1", if I click btnAdd button on Form2 then show string "this is form 2".</p> <p>I want to use delegate and event to do that. Could you help me. Thank you very much. </p> <p>My code following but not run. the true result must show on messagebox "add successful":</p> <pre><code>using System; using System.Collections.Generic; using System.ComponentModel; using System.Drawing; using System.Data; using System.Text; using System.Windows.Forms; namespace EventDelegateUserControl { public partial class UC_them : UserControl { public UC_them() { InitializeComponent(); } public delegate void ThemClickHandler(object sender, EventArgs e); public event ThemClickHandler ThemClick; public void OnThemClick(EventArgs e) { if (ThemClick != null) { ThemClick(this,e); } } public void add() { OnThemClick(EventArgs.Empty); } public void btnThem_Click(object sender, EventArgs e) { add(); } } //--------------------------- public partial class Form1 : Form { public UC_them uc_them =new UC_them(); public Form1() { InitializeComponent(); } public void dangky(UC_them uc_them) { uc_them.ThemClick += new UC_them.ThemClickHandler(uc_them_ThemClick); } void uc_them_ThemClick(object sender, EventArgs e) { MessageBox.Show("Add successful"); } } //---------------------------- static class Program { [STAThread] static void Main() { Application.EnableVisualStyles(); Application.SetCompatibleTextRenderingDefault(false); Application.Run(new Form1()); UC_them them = new UC_them(); Form1 form1 = new Form1(); form1.dangky(them); } } } </code></pre>
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