快閃人生: 12月 2017

2017/12/28

【C#】偵測Disk插入/卸除

要在C#中偵測磁碟機的改變（新增／插入、移除／卸除）可以透過ManagementEventWatcher類別加上Windows提供的WMI來達到此功能，直接看程式碼內容：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Management;

namespace DiskDetect
{
    class Program
    {
        static void Main(string[] args)
        {
            ManagementEventWatcher watcher = new ManagementEventWatcher();
            WqlEventQuery query = new WqlEventQuery("SELECT * FROM Win32_VolumeChangeEvent WHERE EventType = 2 or EventType = 3");
            watcher.EventArrived += new EventArrivedEventHandler(watcher_EventArrived);
            watcher.Query = query;
            watcher.Start();

            Console.ReadLine();
        }

        static void watcher_EventArrived(object sender, EventArrivedEventArgs e)
        {
            if (Convert.ToInt16(e.NewEvent.Properties["EventType"].Value) == 2)
            {
                Console.WriteLine("Disk Insert: " + e.NewEvent.Properties["DriveName"].Value);
            }
            else
            {
                Console.WriteLine("Disk Remove: " + e.NewEvent.Properties["DriveName"].Value);
            }
        }
    }
}

參考連結：
ManagementEventWatcher Class
Win32_VolumeChangeEvent

Keyword: How to detect disk state in C# language

2017/12/21

【AutoIt】插入一個執行時期的錯誤

在任何程式語言要插入一個執行時期錯誤(run time error)最快的方式大概就是誤用陣列吧，所以要在AutoIt中埋入一個執行時期錯誤最簡單的方式也不外乎是用這招，直接看底下範例：

#cs
Inject a run time error for autoit script
#ce
Global $arr[1]
$arr[0] = 50
MsgBox(0, "Run Time Error", $arr[1])