alle. Ich habe ein Problem bei der Entwicklung meines Testmedienplayers in C# festgestellt. Ich denke, ich habe den ganzen Code, aber wenn ich die Datei öffne, fängt es an zu spielen, aber Fortschrittsbalken bewegt sich nicht. Hier ist der Code:C# ProgressBar zeigt keinen Fortschritt im Media Player
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;
using Windows.Media;
using Windows.Storage;
using Windows.Storage.Pickers;
using System.Threading;
using System.Windows;
namespace App1
{
public sealed partial class MainPage : Page
{
public MainPage()
{
this.InitializeComponent();
DispatcherTimer timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromSeconds(1);
timer.Tick += timer_Tick;
timer.Start();
}
TimeSpan _position;
private async void Open_Click(object sender, RoutedEventArgs e)
{
var openPicker = new FileOpenPicker();
openPicker.SuggestedStartLocation = PickerLocationId.VideosLibrary;
openPicker.FileTypeFilter.Add(".wmv");
openPicker.FileTypeFilter.Add(".mp4");
openPicker.FileTypeFilter.Add(".mp3");
var file = await openPicker.PickSingleFileAsync();
if (file != null)
{
var stream = await file.OpenAsync(FileAccessMode.Read);
videoMediaElement.SetSource(stream, file.ContentType);
}
}
private void Play_Click(object sender, RoutedEventArgs e)
{
if(videoMediaElement.PlaybackRate != 1)
{
videoMediaElement.DefaultPlaybackRate = 1;
}
videoMediaElement.Play();
}
private void Stop_Click(object sender, RoutedEventArgs e)
{
videoMediaElement.Stop();
}
private void ProgressBar_ValueChanged(object sender, RangeBaseValueChangedEventArgs e)
{
}
private void timer_Tick(object sender, object e)
{
if (videoMediaElement.Source != null && videoMediaElement.NaturalDuration.HasTimeSpan)
{
ProgressBar.Minimum = 0;
ProgressBar.Maximum = videoMediaElement.NaturalDuration.TimeSpan.TotalSeconds;
ProgressBar.Value = videoMediaElement.Position.TotalSeconds;
}
}
private void videoMediaElement_MediaOpened(object sender, RoutedEventArgs e)
{
_position = videoMediaElement.NaturalDuration.TimeSpan;
ProgressBar.Minimum = 0;
ProgressBar.Maximum = _position.TotalSeconds;
}
}
}
und XAML:
<Page
x:Class="App1.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:App1"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
<Button x:Name="Open" Content="Open" HorizontalAlignment="Left" Margin="60,564,0,0" VerticalAlignment="Top" Width="299" Click="Open_Click"/>
<Button x:Name="Play" Content="Play" HorizontalAlignment="Left" Margin="393,564,0,0" VerticalAlignment="Top" Width="299" Click="Play_Click"/>
<Button x:Name="Stop" Content="Stop" HorizontalAlignment="Left" Margin="737,564,0,0" VerticalAlignment="Top" Width="299" Click="Stop_Click"/>
<ProgressBar x:Name="ProgressBar"
HorizontalAlignment="Left" Height="16" Margin="60,665,0,0" VerticalAlignment="Top" Width="1185" ValueChanged="ProgressBar_ValueChanged"/>
<Slider x:Name="slider" HorizontalAlignment="Left" Margin="1082,557,0,0" VerticalAlignment="Top" Width="163"/>
<MediaElement x:Name="videoMediaElement" HorizontalAlignment="Left" Height="491.884" Margin="4.22,58.023,0,0" VerticalAlignment="Top" Width="1270.501" RenderTransformOrigin="0.5,0.5" UseLayoutRounding="False" d:LayoutRounding="Auto" MediaOpened="videoMediaElement_MediaOpened">
<MediaElement.RenderTransform>
<CompositeTransform Rotation="0.111"/>
</MediaElement.RenderTransform>
</MediaElement>
</Grid>
plz help !! Ich habe 2 Tage verschwendet und bei Google habe ich keine echte Lösung gefunden. Vielen Dank!
Haben Sie Ihr "timer_Tick" -Ereignis getestet, um den Wert von 'TotalSeconds' zu überprüfen? – C4u
ja. Debugger zeigte keine Fehler .. Ich weiß nicht, was du meinst? – user6533736