用户控件中的计时器 [英] Timer in usercontrol

问题描述

所以，我需要一个带导航的基本wpf应用程序。对于导航，我选择了UserControl。 UserControl中有TextBlock和Button，例如Home调用它。对于Timer我创建了静态类。以下是Timer.cs代码：

So, I need a basic wpf application with navigation. For navigation I chose UserControl. There is TextBlock and Button in UserControl, call it for example Home. For Timer I created static class. Here is the following Timer.cs code:

namespace WpfApplication12
{
    public static class Timer
    {
        static DispatcherTimer dt = new DispatcherTimer();
        static Stopwatch sw = new Stopwatch();
        static string currenttime = string.Empty;

        static Timer()
        {
            dt.Tick += new EventHandler(dt_Tick);
            dt.Interval = new TimeSpan(0, 0, 0, 0, 1);
        }

        public static string Time
        {
            get
            {
                return currenttime;
            }
        }

        private static void dt_Tick(object sender, EventArgs e)
        {
            if (sw.IsRunning)
            {
                TimeSpan ts = sw.Elapsed;
                currenttime = string.Format("{0.00}:{1.00}.{2.00}",
                    ts.Minutes, ts.Seconds, ts.Milliseconds / 10);
            }

        }

        public static void StartTime()
        {
            sw.Start();
            dt.Start();
        }

        public static void StopTime()
        {
            if (sw.IsRunning)
                sw.Stop();
        }
    }
}

所以，问题是我试图显示定时器时间在Home.xaml（UserControl）的TextBlock上，应用程序每次都停止和关闭。



我尝试过：



这是Home.xaml（UserControl）代码：

So, the problem is when I try to display Timer time on the TextBlock in Home.xaml(UserControl), application stopping and closing every time.

What I have tried:

Here is the Home.xaml(UserControl) code:

<UserControl x:Class="WpfApplication12.Home"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="50"/>
            <RowDefinition Height="auto"/>
        </Grid.RowDefinitions>
        <Button Content="Start" Name="btn_Start" Grid.Row="0" Click="btn_Start_Click"/>
        <TextBlock Text="" Name="Display" FontSize="36" Grid.Row="1"/>
    </Grid>
</UserControl>

Home.xaml.cs：

Home.xaml.cs:

namespace WpfApplication12
{
    public partial class Home : UserControl
    {
        public Home()
        {
            InitializeComponent();
        }

        private void btn_Start_Click(object sender, RoutedEventArgs e)
        {
            Timer.StartTime();
            Display.Text = Timer.Time;
        }
    }
}

MainWindow.xaml：

MainWindow.xaml:

<Window x:Class="WpfApplication12.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:local="clr-namespace:WpfApplication12"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <ListBox>
            <local:Home Width="200"/>
        </ListBox>
    </Grid>
</Window>

推荐答案

 public partial class StopWatchDemo : Window
{
    DispatcherTimer dt = new DispatcherTimer();
    Stopwatch stopWatch = new Stopwatch();
    string currentTime = string.Empty;
    public StopWatchDemo()
    {
        InitializeComponent();
        dt.Tick += new EventHandler(dt_Tick);
        dt.Interval = new TimeSpan(0, 0, 0, 0, 1);
    }

    void dt_Tick(object sender, EventArgs e)
    {
        if (stopWatch.IsRunning)
        {
            TimeSpan ts = stopWatch.Elapsed;
            currentTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}",
                ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds / 10);
            ClockTextBlock.Text = currentTime;
        }
    }
    private void StartButton_Click(object sender, RoutedEventArgs e)
    {
        stopWatch.Start();
        dt.Start();
    }

}

}

这篇关于用户控件中的计时器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！