UserPreferenceChangingEventArgs 类

定义

命名空间:

Microsoft.Win32

程序集:

Microsoft.Win32.SystemEvents.dll

包:

Microsoft.Win32.SystemEvents v8.0.0

Source:

UserPreferenceChangingEventArgs.cs

为 UserPreferenceChanging 事件提供数据。

C#

public class UserPreferenceChangingEventArgs : EventArgs

继承

Object

EventArgs

UserPreferenceChangingEventArgs

示例

下面的代码示例演示如何使用 UserPreferenceChangingEventArgs 类型监视 UserPreferenceChanging 事件。 此代码示例是为 SystemEvents 类提供的一个更大示例的一部分。

C#

using System;
using Microsoft.Win32;

public sealed class App 
{
    static void Main() 
    {         
        // Set the SystemEvents class to receive event notification when a user 
        // preference changes, the palette changes, or when display settings change.
        SystemEvents.UserPreferenceChanging += new 
            UserPreferenceChangingEventHandler(SystemEvents_UserPreferenceChanging);
        SystemEvents.PaletteChanged += new 
            EventHandler(SystemEvents_PaletteChanged);
        SystemEvents.DisplaySettingsChanged += new 
            EventHandler(SystemEvents_DisplaySettingsChanged);        

        // For demonstration purposes, this application sits idle waiting for events.
        Console.WriteLine("This application is waiting for system events.");
        Console.WriteLine("Press <Enter> to terminate this application.");
        Console.ReadLine();
    }

    // This method is called when a user preference changes.
    static void SystemEvents_UserPreferenceChanging(object sender, UserPreferenceChangingEventArgs e) 
    {
        Console.WriteLine("The user preference is changing. Category={0}", e.Category);
    }

    // This method is called when the palette changes.
    static void SystemEvents_PaletteChanged(object sender, EventArgs e)
    {
        Console.WriteLine("The palette changed.");
    }

    // This method is called when the display settings change.
    static void SystemEvents_DisplaySettingsChanged(object sender, EventArgs e)
    {
        Console.WriteLine("The display settings changed.");
    }
}

// This code produces the following output.
// 
//  This app is waiting for system events.
//  Press <Enter> to terminate this application.
//  Display Settings changed.
//  User preference is changing. Category=General

注解

即将应用对用户首选项的更改时，会发生一个 UserPreferenceChanging 事件。

构造函数

UserPreferenceChangingEventArgs(UserPreferenceCategory)

使用指定的用户首选项类别标识符初始化 UserPreferenceChangingEventArgs 类的新实例。

属性

Category

获取正在更改的用户首选项的类别。

方法

Equals(Object)	确定指定对象是否等于当前对象。 (继承自 Object)
GetHashCode()	作为默认哈希函数。 (继承自 Object)
GetType()	获取当前实例的 Type。 (继承自 Object)
MemberwiseClone()	创建当前 Object 的浅表副本。 (继承自 Object)
ToString()	返回表示当前对象的字符串。 (继承自 Object)

适用于

另请参阅

• UserPreferenceChangingEventHandler
• UserPreferenceCategory
• UserPreferenceChanging
• SystemEvents