WPF-计时器（自学记录）

用的wpf 为vs2017，应公司要求在采数时加入计时器，并一并保存下来。做个记录，主要为在WPF中，计时器的用法。

xaml中主要用到：textblock 和 textbox；<TextBlock Grid.Row="5" Grid.Column="4" HorizontalAlignment="Stretch" Margin="5" TextWrapping="Wrap" Text="计时器:" TextAlignment="Right" VerticalAlignment="Center" /> <TextBox x:Name="tb_timer" Grid.Row="5" Grid.Column="5" HorizontalAlignment="Stretch" Margin="1" TextAlignment="Center" VerticalAlignment="Center" Foreground="#FF307095"/>

添加完界面显示后在主界面代码，添加using System.Timers;
主要用的是DispatcherTimer

using System.Timers;DispatcherTimer m_Timer1s = null; //定义1S计时器TimeSpan _timeSpan = new TimeSpan(0, 0, 0, 0, 0);/// <summary>/// 状态/// </summary>enum State{Start,Pause,End}/// <summary>/// 状态/// </summary>State _state = State.End;private void Window_Loaded(object sender, RoutedEventArgs e) //初始化{m_Timer1s = new DispatcherTimer();      m_Timer1s.Interval = new TimeSpan(0, 0, 0, 1);m_Timer1s.Tick += Timer1s_Tick; m_Timer1s.IsEnabled = true;//m_Timer1s.Stop();m_Timer1s.Start();}private void Timer1s_Tick(object sender, EventArgs e)//计时执行的程序{switch (_state){case State.Start: //开始{_timeSpan += new TimeSpan(0, 0, 0, 1);}break;case State.Pause: //暂停{}break;case State.End: //结束{_timeSpan = new TimeSpan(); //结束完就归零，重新开始//_timeSpan = new TimeSpan(0, 23, 12, 45, 54);}break;}var time = string.Format("{0:00}:{1:00}:{2:00}", _timeSpan.Hours, _timeSpan.Minutes, _timeSpan.Seconds);tb_timer.Text = time;}

代码就是怎么多，其中State.Start,State.End;类似与 DispatcherTimer这个类，设置一个新的对象，如我的： m_Timer1s = new DispatcherTimer();
然后 m_Timer1s.Start(); m_Timer1s.Stop();
start和stop，我都放在串口打开和关闭处，方便看到接受数据用了多长时间。

代码来自于：https://www.cnblogs.com/simonryan/p/3678581.html