private void TextBox_Key_TextChanged(object sender, TextChangedEventArgs e)
 {
     if (tmpkey != TextBox_Key.Text)
     {
         Regex  rgx = new Regex("[^a-fA-F0-9]");
         String key = TextBox_Key.Text;
         key = rgx.Replace(key, "");
         //暫存處理key
         String buf = "";
         for (int i = 0; i < key.Length; i++)
         {
             buf += key.Substring(i, 1);
             if (i % 2 == 1 && i != key.Length - 1)
             {
                 buf += " ";
             }
         }
         tmpkey           = buf;
         TextBox_Key.Text = buf;
         //將游標移到最後
         TextBox_Key.Select(TextBox_Key.Text.Length, 0);
     }
 }
 private void Button_GetSerNum_Click(object sender, RoutedEventArgs e)
 {
     TextBox_SN.Text = Device.DevInfo.SerialNumber;
     TextBox_Key.Focus();
 }