Timer in usercontrol

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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:

C#

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();
        }
    }
}

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:

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:

<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>

Posted 4-Apr-16 3:13am

Member 12355239

Updated 4-Apr-16 19:23pm

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Comments

Richard Deeming 4-Apr-16 9:40am

Your application is terminating because something is throwing an exception which your code doesn't handle.

You need to debug the application and get the details of the exception. That will tell you what the problem is.

If you don't understand the exception, then update your question and post the full details of the exception, including any inner exceptions. Remember to indicate which line of code the exception is thrown from.

Member 12355239 5-Apr-16 14:24pm

Yeap, thanks, i clicked debug program, it shwoed me what's problem with and that was the line of the Timer time. Just wrote once again timer and it's working

Gautham Prabhu K 4-Apr-16 10:53am

What is the exception or error your getting?

Member 12355239 5-Apr-16 14:25pm

got SystemFormatException, but I created this right way

Sergey Alexandrovich Kryukov 4-Apr-16 14:18pm

What is the purpose of this timer? It does not seem to do anything useful. What do you want to achieve.
—SA

Member 12355239 5-Apr-16 14:26pm

The main purpose of the timer was to count how much time user spend for some operations. It's not in this app, but this app just was instance what did I need. It's solved. Thanks.

Sergey Alexandrovich Kryukov 5-Apr-16 14:44pm

Apparently, you don't need a timer. Why?! It makes no sense at all.
You need a Stopwatch, which is, in contrast to timers, is perfectly safe.
—SA

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Gokulprasad05 · Accepted Answer · 2016-04-04T19:23:00

C#

 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();
    }

}