问题描述

link下，比如有一个事件，+=了两个方法，如何只执行第二个方法，不执行第一个？

link下，比如有一个事件，+=了两个方法，如何只执行第二个方法，不执行第一个？

解决方案

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
button1.Click += button1_Click_1;
}

    private void button1_Click(object sender, EventArgs e)
    {
        MessageBox.Show("button1_0");
    }
    private void button1_Click_1(object sender, EventArgs e)
    {
        MessageBox.Show("button1_1");
    }
    public static Delegate[] GetObjectEventList(object p_Object, string p_EventName, Type p_EventType)
    {
        PropertyInfo _PropertyInfo = p_Object.GetType().GetProperty("Events", BindingFlags.Instance | BindingFlags.NonPublic);
        if (_PropertyInfo != null)
        {
            object _EventList = _PropertyInfo.GetValue(p_Object, null);
            if (_EventList != null && _EventList is EventHandlerList)
            {
                EventHandlerList _List = (EventHandlerList)_EventList;
                FieldInfo _FieldInfo = p_EventType.GetField(p_EventName, BindingFlags.Static | BindingFlags.NonPublic | BindingFlags.IgnoreCase);
                if (_FieldInfo == null) return null;
                Delegate _ObjectDelegate = _List[_FieldInfo.GetValue(p_Object)];
                if (_ObjectDelegate == null) return null;
                return _ObjectDelegate.GetInvocationList();
            }
        }
        return null;
    }

    private void button2_Click(object sender, EventArgs e)
    {
        Delegate[] _List = GetObjectEventList(button1, "EventClick", typeof(Control));
        _List[1].Method.Invoke(this, new object[] { sender, e });
    }
}

}