为窗体添加 "最大化","最小化","还原"等 事件
为窗体添加 "最大化","最小化","还原"等 事件
电子科技大学软件学院03级02班 周银辉
在.Net3.0以前的版本中(Form类)都没有与窗口最大化、最小化等相关的事件, 这让人很郁闷. ( .Net3.0的Window类中添加了该事件"StateChanged "). 这里来重写Form类以便添加这几个事件.
1, 参数 WindowStateChangedEventArgs
/// <summary>
/// 包含窗口状态变化时的相关数据
/// </summary>
public class WindowStateChangedEventArgs : EventArgs
{
private readonly FormWindowState oldState;
private readonly FormWindowState newState;
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public FormWindowState OldState
{
get
{
return oldState;
}
}
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public FormWindowState NewState
{
get
{
return newState;
}
}
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public WindowStateChangedEventArgs(FormWindowState oldState, FormWindowState newState)
{
this.oldState = oldState;
this.newState = newState;
}
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}
2, 继承Form类并添加事件WindowStateChanged
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
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namespace MDIHelper
{
public partial class CustomForm : Form
{
//记录状态变化之前的状态
private FormWindowState preWindowState = FormWindowState.Normal;
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public CustomForm()
{
InitializeComponent();
}
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事件
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重写的方法
}
}
其中最重要的部分是 protected override void WndProc(ref Message m) , 它捕获了发给窗体的消息, 关于消息的常量值可以在winuser.h中找到,关于消息的具体含义可以在WindowsSDK中找到.
更多的, 你可以利用protected override void WndProc(ref Message m) 创建更多事件.
电子科技大学软件学院03级02班 周银辉
在.Net3.0以前的版本中(Form类)都没有与窗口最大化、最小化等相关的事件, 这让人很郁闷. ( .Net3.0的Window类中添加了该事件"StateChanged "). 这里来重写Form类以便添加这几个事件.
1, 参数 WindowStateChangedEventArgs
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![](/Images/OutliningIndicators/ExpandedBlockEnd.gif)
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2, 继承Form类并添加事件WindowStateChanged
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/None.gif)
![](/Images/OutliningIndicators/ExpandedBlockStart.gif)
![](/Images/OutliningIndicators/InBlock.gif)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
![](/Images/OutliningIndicators/InBlock.gif)
![](/Images/OutliningIndicators/InBlock.gif)
![](/Images/OutliningIndicators/InBlock.gif)
![](/Images/OutliningIndicators/InBlock.gif)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
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![](/Images/OutliningIndicators/ContractedSubBlock.gif)
![](/Images/OutliningIndicators/ExpandedSubBlockEnd.gif)
![](/Images/OutliningIndicators/ExpandedBlockEnd.gif)
其中最重要的部分是 protected override void WndProc(ref Message m) , 它捕获了发给窗体的消息, 关于消息的常量值可以在winuser.h中找到,关于消息的具体含义可以在WindowsSDK中找到.
更多的, 你可以利用protected override void WndProc(ref Message m) 创建更多事件.