[C#] 監控USB插拔 2

先前也寫過一篇 監控 USB 插拔的文章，見 http://kuomingwang.blogspot.com/2010/09/c-usb.html
但是那是監控已知的 USB 儲存設備，最近又有類似的需求，這算是另一種寫法。

//using System.Management;

ManagementEventWatcher mew = null;

         private void Form1_Load(object sender, EventArgs e)
        {
            mew = new ManagementEventWatcher("SELECT * FROM __InstanceOperationEvent WITHIN 10 WHERE TargetInstance ISA \"Win32_DiskDrive\"");
            mew.Start();
            mew.EventArrived += new EventArrivedEventHandler(mew_go);
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            mew.Stop();
        }
        private void mew_go(object sender, System.Management.EventArrivedEventArgs e)
        {
            ManagementBaseObject newEvent = e.NewEvent, newEventTarget = (newEvent["TargetInstance"] as ManagementBaseObject);
            if (newEventTarget["InterfaceType"].ToString() == "USB")
            {
                switch (newEvent.ClassPath.ClassName)
                {
                    case "__InstanceCreationEvent":
                        Listbox_text_Update(listBox1, Convert.ToString(newEventTarget["Caption"])+" 裝置已插入");
                        break;
                    case "__InstanceDeletionEvent":
                        Listbox_text_Update(listBox1, Convert.ToString(newEventTarget["Caption"])+" 裝置已退出");
                        break;
                }
            }
        }
        public static void Listbox_text_Update(ListBox lbox, string s)
        {
            if (lbox.InvokeRequired)
            {
                lbox.BeginInvoke(new MethodInvoker(() => Listbox_text_Update(lbox, s)));
            }
            else
            {
                lbox.Items.Add(s);
            }
        }

[C#] 如何變更本機電腦日期、變更本機電腦時間，來作 時間同步校正

主要需求是因為 有些 Client 端 PC 都是服役多年的老 PC 所以 BIOS 電池都沒力了，又懶得一台一台換。

所以直接從 SQL Server 端 作時間的校正。

 [DllImport("Kernel32.dll")]
 private extern static uint SetLocalTime(ref SYSTEMTIME lpSystemTime);

 [StructLayout(LayoutKind.Sequential)]
        private struct SYSTEMTIME
        {
            public ushort wYear;
            public ushort wMonth;
            public ushort wDayOfWeek;
            public ushort wDay;
            public ushort wHour;
            public ushort wMinute;
            public ushort wSecond;
            public ushort wMilliseconds;
        }

 public void SetTime(DateTime SqlServerTime)
        {
            SYSTEMTIME st = new SYSTEMTIME();
            st.wYear = Convert.ToUInt16(SqlServerTime.Year);
            st.wMonth = Convert.ToUInt16(SqlServerTime.Month);
            st.wDay = Convert.ToUInt16(SqlServerTime.Day);
            st.wHour = Convert.ToUInt16(SqlServerTime.Hour);
            st.wMilliseconds = Convert.ToUInt16(SqlServerTime.Millisecond);
            st.wMinute = Convert.ToUInt16(SqlServerTime.Minute);
            st.wSecond = Convert.ToUInt16(SqlServerTime.Second);
            SetLocalTime(ref st);
        }

//使用時
  ChangeLocalDateTime CLDT = new ChangeLocalDateTime();
 CLDT.SetTime(db_dt); //db_dt 是指從 SQL Server 取回來的 GETDATE()

[C#] 取得本機 網路介面卡名稱、網路名稱

作業上有用到 作個筆記


        //取得 網路名稱 例如：中華電信
        private void dd()
        {
             NetworkInterface[] interfaces = NetworkInterface.GetAllNetworkInterfaces();
             foreach (NetworkInterface adapter in interfaces)
             {
                 comboBox2.Items.Add(adapter.Name.ToString());
             }
        }
        //取得 網路介面卡名稱
        private void GetAdtInfo()
        {
            string strQry = "Select * from Win32_NetworkAdapterConfiguration";
            ManagementObjectSearcher objSc = new ManagementObjectSearcher(strQry);
            ArrayList ar = new ArrayList();
            foreach (ManagementObject objQry in objSc.Get())
            {
                comboBox1.Items.Add(objQry["Description"]);
            }
        }

[C#] String 處理, 簡體 轉 繁體

有兩種作法  ，  第一種 是引用 Microsoft.VisualBasic  ，第二種 是引用 作業系統 Dll
但是第一種 有時候轉完 會出現?號，原因不明 （時間關係 所以沒繼續追 下去）

1.)
Microsoft.VisualBasic 加入參考
 private string CHT_TO_BIG5(string str)
        {
            return Microsoft.VisualBasic.Strings.StrConv(str, Microsoft.VisualBasic.VbStrConv.TraditionalChinese, 0);
        }

2.)
 //字串轉 繁體 使用
        internal const int LOCALE_SYSTEM_DEFAULT = 0x0800;
        internal const int LCMAP_SIMPLIFIED_CHINESE = 0x02000000;
        internal const int LCMAP_TRADITIONAL_CHINESE = 0x04000000;
        [DllImport("kernel32", CharSet = CharSet.Auto, SetLastError = true)]
        internal static extern int LCMapString(int Locale, int dwMapFlags, string lpSrcStr, int cchSrc, [Out] string lpDestStr, int cchDest);

 private string String_To_BIG5(string str)
        {
            String tTarget = new String(' ', str.Length);
            int tReturn = LCMapString(LOCALE_SYSTEM_DEFAULT, LCMAP_TRADITIONAL_CHINESE, str, str.Length, tTarget, str.Length);
            return tTarget;
        }

[Other] 利用Reg.exe 快速開啟/關閉 螢幕保護程式

因為工作上的需求 需要能夠 快速開啟/關閉  螢幕保護程式

//這一行是將 螢幕保護 指定開啟 C:\Windows\system32\scrnsave.scr
reg add "HKCU\Control Panel\Desktop" /v SCRNSAVE.EXE /t reg_sz /d C:\Windows\system32\scrnsave.scr /f
//指定系統閒置 300秒 開啟螢幕保護啟動
reg add "HKCU\Control Panel\Desktop" /v ScreenSaveTimeOut /t reg_sz /d 300 /f
//開啟  若設為0  表示關閉
reg add "HKCU\Control Panel\Desktop" /v ScreenSaveActive /t reg_sz /d 1 /f