利用反射绑定事件处理程序(C#)

利用反射绑定事件处理程序(C#)

传统的写法：强类型的情况下

using System;
using System.Collections.Generic;
using System.Text;

using System.Reflection;

namespace ConsoleApplication3
{
class Program
{
static void Main(string[] args)
{
Customer c = new Customer();
c.OnChange += new EventHandler(c_OnChange);

c.Change();
Console.Read();

}

static void c_OnChange(object sender, EventArgs e)
{
Console.WriteLine("事件被触发了");
}
}

class Customer
{
public event EventHandler OnChange;
public void Change()
{
if (OnChange != null)
OnChange(this, null);
}
}
}

值得了解的另外一个写法

using System;
using System.Collections.Generic;
using System.Text;

using System.Reflection;

namespace ConsoleApplication3
{
class Program
{
static void Main(string[] args)
{
Customer c = new Customer();
EventInfo evt = c.GetType().GetEvent("OnChange",
BindingFlags.NonPublic | BindingFlags.Instance
| BindingFlags.Public
);

evt.AddEventHandler(c, new EventHandler(c_OnChange));

c.Change();
Console.Read();

}

static void c_OnChange(object sender, EventArgs e)
{
Console.WriteLine("事件被触发了");
}
}

class Customer
{
public event EventHandler OnChange;
public void Change()
{
if (OnChange != null)
OnChange(this, null);
}
}
}

传统的写法：强类型的情况下

using System;
using System.Collections.Generic;
using System.Text;

using System.Reflection;

namespace ConsoleApplication3
{
class Program
{
static void Main(string[] args)
{
Customer c = new Customer();
c.OnChange += new EventHandler(c_OnChange);

c.Change();
Console.Read();

}

static void c_OnChange(object sender, EventArgs e)
{
Console.WriteLine("事件被触发了");
}
}

class Customer
{
public event EventHandler OnChange;
public void Change()
{
if (OnChange != null)
OnChange(this, null);
}
}
}

值得了解的另外一个写法

using System;
using System.Collections.Generic;
using System.Text;

using System.Reflection;

namespace ConsoleApplication3
{
class Program
{
static void Main(string[] args)
{
Customer c = new Customer();
EventInfo evt = c.GetType().GetEvent("OnChange",
BindingFlags.NonPublic | BindingFlags.Instance
| BindingFlags.Public
);

evt.AddEventHandler(c, new EventHandler(c_OnChange));

c.Change();
Console.Read();

}

static void c_OnChange(object sender, EventArgs e)
{
Console.WriteLine("事件被触发了");
}
}

class Customer
{
public event EventHandler OnChange;
public void Change()
{
if (OnChange != null)
OnChange(this, null);
}
}
}