WinForm窗体事件执行次序

当 Windows Form 应用程序启动时，会以下列顺序引发主要表单的启动事件：
        System.Windows.Forms.Control.HandleCreated
        System.Windows.Forms.Control.BindingContextChanged
        System.Windows.Forms.Form.Load
        System.Windows.Forms.Control.VisibleChanged
        System.Windows.Forms.Form.Activated
        System.Windows.Forms.Form.Shown

    当应用程序关闭时，会以下列顺序引发主要表单的关闭事件：         
        System.Windows.Forms.Form.Closing
        System.Windows.Forms.Form.FormClosing
        System.Windows.Forms.Form.Closed
        System.Windows.Forms.Form.FormClosed
        System.Windows.Forms.Form.Deactivate

二、以下是我测试的次序，全部protected override 这些事件，并且在其base.的前后分别处理一次，如下

protected override void OnLoad(EventArgs e)    
{ 
    textBox1.Text += "OnLoad1" + "\r\n";    
    base.OnLoad(e);    
    textBox1.Text += "OnLoad2" + "\r\n";    
}

OnClientSizeChanged1
OnClientSizeChanged2
OnClientSizeChanged1
OnClientSizeChanged2

// Loyout要多次执行
OnLayout1 
OnLayout2
OnHanleCreated1
OnHanleCreated2
OnInvalidated1
OnInvalidated2

// 注意这里的一点点变化
OnCreateControl1
OnLoad1
OnLoad2
OnCreateControl2

//
OnLayout1
OnLayout2
OnActivated1
OnActivated2
OnShown1
OnShown2
OnPain1
OnPain2

希望这个次序能给大家带来用处。。可以在不同事件中去处理所需要的代码

三、以下是代码源

using System; 
using System.Collections.Generic; 
using System.ComponentModel; 
using System.Data; 
using System.Drawing; 
using System.Text; 
using System.Windows.Forms; 
  
namespace WindowsFormsApplication1 
{ 
    public partial class Form1 : Form 
    { 
        public Form1() 
        { 
            InitializeComponent(); 
        } 
  
        /* 
         * 输出窗体事件的执行次序 
         */
  
        protected override void OnActivated(EventArgs e) 
        { 
            textBox1.Text += "OnActivated1" + "\r\n"; 
            base.OnActivated(e); 
            textBox1.Text += "OnActivated2" + "\r\n"; 
        } 
  
        protected override void OnClientSizeChanged(EventArgs e) 
        { 
            textBox1.Text += "OnClientSizeChanged1" + "\r\n"; 
            base.OnClientSizeChanged(e); 
            textBox1.Text += "OnClientSizeChanged2" + "\r\n"; 
        } 
  
        protected override void OnCreateControl() 
        { 
            textBox1.Text += "OnCreateControl1" + "\r\n"; 
            base.OnCreateControl(); 
            textBox1.Text += "OnCreateControl2" + "\r\n"; 
        } 
  
        protected override void OnDeactivate(EventArgs e) 
        { 
            textBox1.Text += "OnDeactivate1" + "\r\n"; 
            base.OnDeactivate(e); 
            textBox1.Text += "OnDeactivate2" + "\r\n"; 
        } 
  
        protected override void OnHandleCreated(EventArgs e) 
        { 
            textBox1.Text += "OnHanleCreated1" + "\r\n"; 
            base.OnHandleCreated(e); 
            textBox1.Text += "OnHanleCreated2" + "\r\n"; 
        } 
  
        protected override void OnHandleDestroyed(EventArgs e) 
        { 
            textBox1.Text += "OnHanleDestoryed1" + "\r\n"; 
            base.OnHandleDestroyed(e); 
            textBox1.Text += "OnHanleDestoryed2" + "\r\n"; 
        } 
  
        protected override void OnInvalidated(InvalidateEventArgs e) 
        { 
            textBox1.Text += "OnInvalidated1" + "\r\n"; 
            base.OnInvalidated(e); 
            textBox1.Text += "OnInvalidated2" + "\r\n"; 
        } 
  
        protected override void OnLayout(LayoutEventArgs levent) 
        { 
            textBox1.Text += "OnLayout1" + "\r\n"; 
            base.OnLayout(levent); 
            textBox1.Text += "OnLayout2" + "\r\n"; 
        } 
  
        protected override void OnLoad(EventArgs e) 
        { 
            textBox1.Text += "OnLoad1" + "\r\n"; 
            base.OnLoad(e); 
            textBox1.Text += "OnLoad2" + "\r\n"; 
        } 
  
        protected override void OnPaint(PaintEventArgs e) 
        { 
            textBox1.Text += "OnPain1" + "\r\n"; 
            base.OnPaint(e); 
            textBox1.Text += "OnPain2" + "\r\n"; 
        } 
  
        protected override void OnShown(EventArgs e) 
        { 
            textBox1.Text += "OnShown1" + "\r\n"; 
            base.OnShown(e); 
            textBox1.Text += "OnShown2" + "\r\n"; 
        } 
    } 
}

转自：http://blog.csdn.net/neok/article/details/4616265