c\#의뢰 와 이벤트 실례 학습

 
using System; 
using System.Collections.Generic; 
using System.Text; 
namespace DelegateAndEvent.App_Code 
{ 
public class Common 
{ 
//      . 
public static string txt = ""; 
#region      
public string HelloCSharp(string name) 
{ 
txt += "hello " + name;//                  . 
return "hello " + name; 
} 
public string HiCSharp(string name) 
{ 
txt += "hi " + name; 
return "hi " + name; 
} 
#endregion 
#region      
//           ,     delegate.     ,      . 
public delegate string SayHi(string name); 
//             .               . 
public SayHi dlgt1, dlgt2; 
//     
public void useDelegate(string name, SayHi sayHi) 
{ 
sayHi(name); 
} 
#endregion 
#region    
//     
public event SayHi hiEvent; 
//     
public void causeEvent() 
{ 
hiEvent += HelloCSharp; 
hiEvent += HiCSharp; 
if (hiEvent != null) 
{ 
hiEvent("crane"); 
} 
} 
#endregion 
} 
} 
using System; 
using System.Collections.Generic; 
using System.Text; 
namespace DelegateAndEvent.App_Code 
{ 
public class Common 
{ 
//      . 
public static string txt = ""; 
#region      
public string HelloCSharp(string name) 
{ 
txt += "hello " + name;//                  . 
return "hello " + name; 
} 
public string HiCSharp(string name) 
{ 
txt += "hi " + name; 
return "hi " + name; 
} 
#endregion 
#region      
//           ,     delegate.     ,      . 
public delegate string SayHi(string name); 
//             .               . 
public SayHi dlgt1, dlgt2; 
//     
public void useDelegate(string name, SayHi sayHi) 
{ 
sayHi(name); 
} 
#endregion 
#region    
//     
public event SayHi hiEvent; 
//     
public void causeEvent() 
{ 
hiEvent += HelloCSharp; 
hiEvent += HiCSharp; 
if (hiEvent != null) 
{ 
hiEvent("crane"); 
} 
} 
#endregion 
} 
} 

 
using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Text; 
using System.Windows.Forms; 
using DelegateAndEvent.App_Code; 
namespace DelegateAndEvent 
{ 
public partial class MainFrm : Form 
{ 
Common common = new Common(); 
public MainFrm() 
{ 
InitializeComponent(); 
} 
private void btnOk_Click(object sender, EventArgs e) 
{ 
//this.lblShow.Text += common.HelloCSharp("tree"); 
//     
common.dlgt1 = common.HelloCSharp;//      ,  () 
common.dlgt1 += common.HiCSharp;//          ,                . 
//this.lblShow.Text += common.dlgt1("tree");//            . 
//this.lblShow.Text = Common.txt; 
//       
//common.useDelegate("tree", common.dlgt1); 
//this.lblShow.Text = Common.txt; 
//   
/*         common.hiEvent();    . 
                  . 
*/ 
common.causeEvent(); 
this.lblShow.Text = Common.txt; 
} 
} 
}