Question

我有一个带倒计时功能的控制窗口。需要倒计时值以显示在不同的窗口上。为此，我创建了一个类/视图模型如下：

public class RunningTime : INotifyPropertyChanged
{
    public string runtime = "";

    public RunningTime()
    {
    }

    public string RunTime
    {
        get
        {
            return runtime;
        }
        set
        {
            if (runtime != value)
            {
                runtime = value;
                OnPropertyChanged("RunTime");
            }
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    private void OnPropertyChanged(String info)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null)
        {
            handler(this, new PropertyChangedEventArgs(info));
        }
    }
}

之后，在控制窗口中，我有一个文本块和一个按钮。 Textblock显示倒计时时间，按钮开始计数。

<TextBox Name="txtTime" IsReadOnly="True"
         Text="{Binding RunTime}"></TextBox>

<Button Name="btnStart" Content="START"
        Click="btnStart_Click"></Button>

在代码背后，我有以下内容：

namespace Stadium
{
    public partial class Window_Control : Window
    {
            RunningTime _runtime = new RunningTime();
            private DispatcherTimer Timer;
            private int runtime = 65;
            public static string str_time = "";

            public Window_Control()
            {
                InitializeComponent();

                base.DataContext = _runtime;
            }

            private void btnStart_Click(object sender, RoutedEventArgs e)
            {
                    Timer = new DispatcherTimer();
                    Timer.Interval = new TimeSpan(0, 0, 1);
                    Timer.Tick += Timer_Tick;
                    Timer.Start();
            }

            public void Timer_Tick(object sender, EventArgs e)
            {
                    if (runtime > 1)
                    {
                            runtime--;
                            string min = ((runtime / 60) < 10) ? "0" + (runtime / 60).ToString() : (runtime / 60).ToString();
                            string sec = ((runtime % 60) < 10) ? "0" + (runtime % 60).ToString() : (runtime % 60).ToString();
                            str_time = string.Format("{0}:{1}", min, sec);

                            _runtime.RunTime = str_time;

                    }
                    else
                    {
                            Timer.Stop();
                            MessageBox.Show("Time's Up");
                    }
            }

在第二个窗口中，应该在控制窗口中显示倒计时，我也有一个文本块。

<TextBlock Name="txtGameTime"
           Text="{Binding Source={StaticResource myDataSource}, Path=RunTime}"></TextBlock>

太糟糕了我无法在第二个窗口显示时间。如何显示倒计时时需要帮助。

非常感谢。

UPDATE（第二个窗口XAML）：

<Window x:Class="Stadium.Window_Game"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:Stadium">

<Window.Resources>
    <local:RunningTime x:Key="myDataSource"/>
</Window.Resources>

<TextBlock Name="txtGameTime"
           Text="{Binding Source={StaticResource myDataSource}, Path=RunTime}"></TextBlock>

Answer 1

将您的计时器逻辑添加到RunningTime类，如下所示：

public class RunningTime: INotifyPropertyChanged
{
    public string runtime = "";
    private DispatcherTimer timer;
    private int runtimeInt = 65;
    public static string str_time = "";

    public RunningTime()
    {
        LoadTimer();
    }

    public string RunTime
    {
        get
        {
            return runtime;
        }
        set
        {
            if (runtime != value)
            {
                runtime = value;
                OnPropertyChanged("RunTime");
            }
        }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    private void OnPropertyChanged(String info)
    {
        PropertyChangedEventHandler handler = PropertyChanged;
        if (handler != null)
        {
            handler(this, new PropertyChangedEventArgs(info));
        }
    }

    public void LoadTimer()
    {
        timer = new DispatcherTimer();
        timer.Interval = new TimeSpan(0, 0, 1);
        timer.Tick += Timer_Tick;
        timer.Start();
    }

    public void Timer_Tick(object sender, EventArgs e)
    {
        if (runtimeInt > 1)
        {
            runtimeInt--;
            string min = ((runtimeInt / 60) < 10) ? "0" + (runtimeInt / 60).ToString() : (runtimeInt / 60).ToString();
            string sec = ((runtimeInt % 60) < 10) ? "0" + (runtimeInt % 60).ToString() : (runtimeInt % 60).ToString();
            str_time = string.Format("{0}:{1}", min, sec);

            this.RunTime = str_time;

        }
        else
        {
            timer.Stop();
            MessageBox.Show("Time's Up");
        }
    }
}

在Window_Control类中，您只需要以下内容：

public partial class Window_Control : Window
{
        RunningTime _runtime = new RunningTime();
        public Window_Control()
        {
            InitializeComponent();

            base.DataContext = _runtime;
        }
}

第二个窗口的xaml将是：

<Window x:Class="Stadium.Window_Game"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="clr-namespace:Stadium">

<Window.Resources>
    <local:RunningTime x:Key="myDataSource"/>
</Window.Resources>

<TextBlock Name="txtGameTime"
           Text="{Binding Source={StaticResource myDataSource}, Path=RunTime}"></TextBlock>

WPF倒数计时器绑定到不同的窗口

1 个答案: