C#委託，事件與回撥函式
阿新 • • 發佈：2019-01-08
using System;
using System.Collections.Generic;
using System.Text;
namespace TestApp
{
///<summary>/// 委託
///</summary>///<param name="s1"></param>///<param name="s2"></param>///<returns></returns>publicdelegatevoid ProcessDelegate(object sender, EventArgs e);
class Program
{
{
/* 第一步執行 */
Test t =new Test();
/* 關聯事件方法，相當於尋找到了委託人 */
t.ProcessEvent +=new ProcessDelegate(t_ProcessEvent);
/* 進入Process方法 */
Console.WriteLine(t.Process());
Console.Read();
}
{
Test t = (Test)sender;
t.Text1 ="Hello";
t.Text2 ="World";
}
}
publicclass Test
{
privatestring s1;
publicstring Text1
{
get { return s1; }
set { s1
}
privatestring s2;
publicstring Text2
{
get { return s2; }
set { s2 = value; }
}
publicevent ProcessDelegate ProcessEvent;
void ProcessAction(object sender, EventArgs e)
{
if (ProcessEvent ==null)
ProcessEvent +=new ProcessDelegate(t_ProcessEvent);
ProcessEvent(sender, e);
}
//如果沒有自己指定關聯方法，將會呼叫該方法丟擲錯誤void t_ProcessEvent(object sender, EventArgs e)
{
thrownew Exception("The method or operation is not implemented.");
}
void OnProcess()
{
ProcessAction(this, EventArgs.Empty);
}
publicstring Process()
{
OnProcess();
return s1 + s2;
}
}
}
using System.Collections.Generic;
using System.Text;
namespace TestApp
{
///<summary>/// 委託
///</summary>///<param name="s1"></param>///<param name="s2"></param>///<returns></returns>publicdelegatevoid ProcessDelegate(object sender, EventArgs e);
class Program
{
{
/* 第一步執行 */
Test t =new Test();
/* 關聯事件方法，相當於尋找到了委託人 */
t.ProcessEvent +=new ProcessDelegate(t_ProcessEvent);
/* 進入Process方法 */
Console.WriteLine(t.Process());
Console.Read();
}
{
Test t = (Test)sender;
t.Text1 ="Hello";
t.Text2 ="World";
}
}
publicclass Test
{
privatestring s1;
publicstring Text1
{
get { return s1; }
set { s1
}
privatestring s2;
publicstring Text2
{
get { return s2; }
set { s2 = value; }
}
publicevent ProcessDelegate ProcessEvent;
void ProcessAction(object sender, EventArgs e)
{
if (ProcessEvent ==null)
ProcessEvent +=new ProcessDelegate(t_ProcessEvent);
ProcessEvent(sender, e);
}
//如果沒有自己指定關聯方法，將會呼叫該方法丟擲錯誤void t_ProcessEvent(object sender, EventArgs e)
{
thrownew Exception("The method or operation is not implemented.");
}
void OnProcess()
{
ProcessAction(this, EventArgs.Empty);
}
publicstring Process()
{
OnProcess();
return s1 + s2;
}
}
}