C#WinForm窗体事件执行次序（较完整版）
一、以下是网络上可搜索到的次序
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
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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
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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"; } }} |
