DispatcherTimer does not fire
I just got started with the Windows Store App and I just needed a very simple application: A fairly multi-program bar that fills in from left to right, but even that task doesn't seem to be the case for me.
I have the following code:
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices.WindowsRuntime;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Navigation;
// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238
namespace TimeLoader
{
/// <summary>
/// An empty page that can be used on its own or navigated to within a Frame.
/// </summary>
public sealed partial class MainPage : Page
{
private DispatcherTimer refreshTimer;
public MainPage()
{
this.InitializeComponent();
}
void refreshTimer_Tick(object sender, object e)
{
TimePassedBar.Value += 5;
}
private void Page_Loaded(object sender, RoutedEventArgs e)
{
TimePassedBar.Value = 50;
new DispatcherTimer();
this.refreshTimer = new DispatcherTimer();
this.refreshTimer.Interval = new TimeSpan(0, 0, 0, 100);
this.refreshTimer.Tick += refreshTimer_Tick;
this.refreshTimer.Start();
}
}
}
<Page
x:Class="TimeLoader.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:TimeLoader"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d" Loaded="Page_Loaded">
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Grid.RowDefinitions>
<RowDefinition/>
</Grid.RowDefinitions>
<Grid.ColumnDefinitions>
<ColumnDefinition></ColumnDefinition>
</Grid.ColumnDefinitions>
<ProgressBar Grid.Row="0" Grid.Column="0" Height="150" Value="75" VerticalAlignment="Center" Name="TimePassedBar"/>
</Grid>
</Page>
Now the same setup works very well when I do it in WPF, but the Tick event never fires when I run this code generated as a Windows store app. Is there something special that I need to pay? Attention when building Windows Store apps? I looked high and low and unfortunately couldn't find anything about it.
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Your code worked fine. You just didn't wait long enough to notice. :)
private void Page_Loaded(object sender, RoutedEventArgs e)
{
TimePassedBar.Value = 50;
this.refreshTimer = new DispatcherTimer();
this.refreshTimer.Interval = TimeSpan.FromMilliseconds(100);
this.refreshTimer.Tick += refreshTimer_Tick;
this.refreshTimer.Start();
}
You set TimeSpan
as 100 seconds . To get milliseconds you need to use a five parameter overload. But IMHO it is easier and clearer to just use the method FromMilliseconds()
(as stated above).
Plus, you don't have to create the object twice DispatcherTimer
, especially if you ignore the first completely. :)
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