using?System;
using?System.Collections.Generic;
using?System.Linq;
using?System.Text;
using?System.Windows;
using?System.Windows.Controls;
using?System.Windows.Data;
using?System.Windows.Documents;
using?System.Windows.Input;
using?System.Windows.Media;
using?System.Windows.Media.Imaging;
using?System.Windows.Navigation;
using?System.Windows.Shapes;
using?System.ComponentModel;

namespace?DateTimePickerControl
{
????public?partial?class?DateTimePicker?:?UserControl?INotifyPropertyChanged
????{
????????public?DateTimePicker（）
????????{
????????????InitializeComponent（）;

????????????DatePickerObj.SelectedDate?=?DateTime.Now;
????????????this.SendPropertyChanged（“SelectedDateTimeString“）;

????????????_selectedHour?=?DateTime.Now.Hour;
????????????_selectedMinute?=?DateTime.Now.Minute;
????????????_selectedSecond?=?DateTime.Now.Second;

????????????_oldTextBox?=?_currentTextBox?=?TextBox_Seconds;
????????????_currentTextBox.Background?=?Brushes.Pink;
????????}
????????public?DateTime?SelectedDateTime
????????{
????????????get
????????????{
????????????????DateTime?obj?=?DatePickerObj.SelectedDate????DateTime.Now;
????????????????return?obj.Add（new?TimeSpan（SelectedHour?-?obj.Hour?SelectedMinute?-?obj.Minute?SelectedSecond?-?obj.Second））;
????????????}
????????}
????????public?String?SelectedDateTimeString
????????{
????????????get
????????????{
????????????????return?SelectedDateTime.ToString（“yyyy-MM-dd?HH-mm-ss“）;
????????????}
????????}

????????#region?private?methods
????????private?void?TextBox_Hours_GotFocus（object?sender?RoutedEventArgs?e）
????????{
????????????_oldTextBox.Background?=?Brushes.Transparent;
????????????_oldTextBox?=?_currentTextBox?=?TextBox_Hours;
????????????_currentTextBox.Background?=?Brushes.Pink;
????????}
????????private?void?TextBox_Minutes_GotFocus（object?sender?RoutedEventArgs?e）
????????{
????????????_oldTextBox.Background?=?Brushes.Transparent;
????????????_oldTextBox?=?_currentTextBox?=?TextBox_Minutes;
????????????_currentTextBox.Background?=?Brushes.Pink;
????????}
????????private?void?TextBox_Seconds_GotFocus（object?sender?RoutedEventArgs?e）
????????{
????????????_oldTextBox.Background?=?Brushes.Transparent;
????????????_oldTextBox?=?_currentTextBox?=?TextBox_Seconds;
????????????_currentTextBox.Background?=?Brushes.Pink;
????????}
????????private?void?ComboBox_DropDownClosed（object?sender?EventArgs?e）
????????{
????????????this.SendPropertyChanged（“SelectedDateTime“）;
????????????this.SendPropertyChanged（“SelectedDateTimeString“）;
????????}

????????private?void?BTN_IncreaseTime_Click（object?sender?RoutedEventArgs?e）
????????{
????????????Int32?result;
????????????if?（Int32.TryParse（_currentTextBox.Text?out?result））
????????????{
????????????????result++;
????????????????_currentTextBox.Text?=?result.ToString（）;
????????????}
????????}
????????private?void?BTN_DecrementTime_Click（object?sender?RoutedEventArgs?e）
???