在此问个问题，MediaElement播放本地和http上的视频没问题，但是ftp的怎么在本例中播放不了
若高手了解，请不吝赐教
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using Microsoft.Win32; using System.IO; using System.Windows.Threading; using System.Threading; using System.Data; using System.Windows.Forms; namespace MediaPlayer_Beta { /// <summary> /// Interaction logic for MainWindow.xaml /// </summary> public partial class MainWindow : Window { DispatcherTimer timer; public delegate void timerTick(); timerTick tick; bool isDragging = false; bool fileIsPlaying = false; string sec, min, hours; public MainWindow() { this.Left = 0; this.Top = 0; InitializeComponent(); seekSlider.Width = SystemParameters.MaximizedPrimaryScreenWidth - 150; this.WindowState = System.Windows.WindowState.Maximized; timer = new DispatcherTimer(); timer.Interval = TimeSpan.FromSeconds(1); timer.Tick += new EventHandler(timer_Tick); tick = new timerTick(changeStatus); } void timer_Tick(object sender, EventArgs e) { Dispatcher.Invoke(tick); } //visualize progressBar void changeStatus() { if (fileIsPlaying) { #region customizeTime if (mediaElement.Position.Seconds < 10) sec = "0" + mediaElement.Position.Seconds.ToString(); else sec = mediaElement.Position.Seconds.ToString(); if (mediaElement.Position.Minutes < 10) min = "0" + mediaElement.Position.Minutes.ToString(); else min = mediaElement.Position.Minutes.ToString(); if (mediaElement.Position.Hours < 10) hours = "0" + mediaElement.Position.Hours.ToString(); else hours = mediaElement.Position.Hours.ToString(); #endregion customizeTime seekSlider.Value = mediaElement.Position.TotalMilliseconds; progressBar.Value = mediaElement.Position.TotalMilliseconds; if (mediaElement.Position.Hours == 0) { currentTimeTextBlock.Text = min + ":" + sec; } else { currentTimeTextBlock.Text = hours + ":" + min + ":" + sec; } } } //open the file private void openFileButton_Click(object sender, RoutedEventArgs e) { string FileName = "http://mschannel9.vo.msecnd.net/o9/mix/09/wmv/key01.wmv"; //"ftp://test:123456@192.168.1.75/media/Linux.wmv";//Ftp测试不能播放，需下载本地再打开 //"e:\\text\\dian\\media\\test.avi"; mediaElement.Source = new Uri(FileName); Thread.Sleep(50); mediaElement.Close(); mediaElement.Play(); } //occurs when the file is opened public void mediaElement_MediaOpened(object sender, RoutedEventArgs e) { timer.Start(); fileIsPlaying = true; openMedia(); } //opens media,adds file to playlist and gets file info public void openMedia() { InitializePropertyValues(); try { #region customizeTime if (mediaElement.NaturalDuration.TimeSpan.Seconds < 10) sec = "0" + mediaElement.Position.Seconds.ToString(); else sec = mediaElement.NaturalDuration.TimeSpan.Seconds.ToString(); if (mediaElement.NaturalDuration.TimeSpan.Minutes < 10) min = "0" + mediaElement.NaturalDuration.TimeSpan.Minutes.ToString(); else min = mediaElement.NaturalDuration.TimeSpan.Minutes.ToString(); if (mediaElement.NaturalDuration.TimeSpan.Hours < 10) hours = "0" + mediaElement.NaturalDuration.TimeSpan.Hours.ToString(); else hours = mediaElement.NaturalDuration.TimeSpan.Hours.ToString(); if (mediaElement.NaturalDuration.TimeSpan.Hours == 0) { endTimeTextBlock.Text = min + ":" + sec; } else { endTimeTextBlock.Text = hours + ":" + min + ":" + sec; } #endregion customizeTime } catch { } string path = mediaElement.Source.LocalPath.ToString(); double duration = mediaElement.NaturalDuration.TimeSpan.TotalMilliseconds; seekSlider.Maximum = duration; progressBar.Maximum = duration; mediaElement.Volume = volumeSlider.Value; mediaElement.SpeedRatio = speedRatioSlider.Value + 1; mediaElement.ScrubbingEnabled = true; volumeSlider.ValueChanged += new RoutedPropertyChangedEventHandler<double>(volumeSlider_ValueChanged); speedRatioSlider.ValueChanged += new RoutedPropertyChangedEventHandler<double>(speedRatioSlider_ValueChanged); } //occurs when the file is done playing private void mediaElement_MediaEnded(object sender, RoutedEventArgs e) { mediaElement.Stop(); volumeSlider.ValueChanged -= new RoutedPropertyChangedEventHandler<double>(volumeSlider_ValueChanged); speedRatioSlider.ValueChanged -= new RoutedPropertyChangedEventHandler<double>(speedRatioSlider_ValueChanged); } //initialize properties of file void InitializePropertyValues() { mediaElement.Volume = (double)volumeSlider.Value; mediaElement.SpeedRatio = (double)speedRatioSlider.Value + 1; } //seek to desirable position of the file private void seekSlider_MouseLeftButtonUp(object sender, MouseButtonEventArgs e) { TimeSpan ts = new TimeSpan(0, 0, 0, 0, (int)seekSlider.Value); changePostion(ts); } //mouse down on slide bar in order to seek private void seekSlider_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e) { isDragging = true; fileIsPlaying = false; } private void seekSlider_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e) { if (isDragging) { TimeSpan ts = new TimeSpan(0, 0, 0, 0, (int)seekSlider.Value); changePostion(ts); fileIsPlaying = true; } isDragging = false; } //change position of the file void changePostion(TimeSpan ts) { mediaElement.Position = ts; } //change the speed of the playback void speedRatioSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e) { mediaElement.SpeedRatio = speedRatioSlider.Value + 1; speedTextBlock.Text = speedRatioSlider.Value + "x"; } //play the file private void playButton__Click(object sender, RoutedEventArgs e) { fileIsPlaying = true; mediaElement.Play(); timer.Start(); } //pause the file private void pauseButton_Click(object sender, RoutedEventArgs e) { fileIsPlaying = false; mediaElement.Pause(); timer.Stop(); } //stop the file private void stopButton_Click(object sender, RoutedEventArgs e) { fileIsPlaying = false; timer.Stop(); mediaElement.Stop(); seekSlider.Value = 0; progressBar.Value = 0; currentTimeTextBlock.Text = "00:00"; } //turn volume up-down private void volumeSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e) { mediaElement.Volume = volumeSlider.Value; } } }
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="d" x:Class="MediaPlayer_Beta.MainWindow" IsHitTestVisible="True" Background="#00000000" ResizeMode="CanResize" IsTabStop="True" Grid.IsSharedSizeScope="True" UseLayoutRounding="True" HorizontalContentAlignment="Center" WindowStyle="ThreeDBorderWindow" AllowsTransparency="False" d:DesignHeight="385" d:DesignWidth="585"> <Grid x:Name="mainGrid" Background="#FF0A0A0A" Height="{Binding}"> <Grid.RowDefinitions> <RowDefinition Height="286*" /> <RowDefinition Height="23" /> <RowDefinition Height="30" /> </Grid.RowDefinitions> <MediaElement MediaEnded="mediaElement_MediaEnded" MediaOpened="mediaElement_MediaOpened" LoadedBehavior="Manual" HorizontalAlignment="Right" Name="mediaElement" VerticalAlignment="Bottom" Opacity="1" AllowDrop="True" Stretch="Fill" IsMuted="False" /> <Button Content="打开" Height="30" HorizontalAlignment="Left" Margin="220,0,0,0" Name="openFileButton" VerticalAlignment="Top" Width="66" Click="openFileButton_Click" Background="#FF030303" Foreground="#FFE8E8E8" Grid.Row="2" /> <Button x:Name="stopButton" Content="停止" Margin="149,0,0,0" Click="stopButton_Click" Background="#FF030303" Foreground="#FFE8E8E8" HorizontalAlignment="Left" Width="65" Grid.Row="2" /> <Slider Height="30" HorizontalAlignment="Left" Margin="292,0,0,0" Name="volumeSlider" VerticalAlignment="Top" Width="87" Value="0.5" Maximum="1" SmallChange="0.01" LargeChange="0.1" Background="Black" Foreground="#FFDBDBDB" IsMoveToPointEnabled="True" Grid.Row="2"></Slider> <Slider Name="speedRatioSlider" VerticalAlignment="Center" Value="0" Width="70" Margin="385,0,0,0" Maximum="3" SmallChange="1" Background="Black" UseLayoutRounding="True" TickPlacement="BottomRight" Foreground="#FFDBDBDB" Height="30" Grid.Row="2" HorizontalAlignment="Left"></Slider> <Button x:Name="pauseButton" Content="暂停" Margin="71,0,0,0" Click="pauseButton_Click" Background="#FF030303" Foreground="#FFE8E8E8" Width="76" HorizontalAlignment="Left" Grid.Row="2" /> <Button x:Name="playButton_" Content="播放" HorizontalAlignment="Left" Width="65" Click="playButton__Click" ClipToBounds="True" Background="#FF030303" Foreground="#FFE8E8E8" Grid.Row="2" Margin="4,0,0,0" /> <TextBlock Height="23" Name="endTimeTextBlock" Text="00:00" Width="68" Background="{x:Null}" Foreground="White" VerticalAlignment="Center" HorizontalAlignment="Right" Margin="495,0,0,0" FlowDirection="RightToLeft" Grid.Row="1" TextAlignment="Center"></TextBlock> <TextBlock Height="23" Name="currentTimeTextBlock" Text="00:00" Width="68" Background="Black" Foreground="#FFDBDBDB" TextAlignment="Center" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="4,0,0,0" Grid.Row="1"></TextBlock> <Slider Width="{Binding}" PreviewMouseLeftButtonUp="seekSlider_PreviewMouseLeftButtonUp" PreviewMouseLeftButtonDown="seekSlider_PreviewMouseLeftButtonDown" MouseLeftButtonUp="seekSlider_MouseLeftButtonUp" Name="seekSlider" Background="{x:Null}" Foreground="Red" BorderBrush="{x:Null}" IsMoveToPointEnabled="True" TickPlacement="None" SnapsToDevicePixels="False" OpacityMask="{x:Null}" IsManipulationEnabled="True" IsSnapToTickEnabled="False" IsSelectionRangeEnabled="False" IsTabStop="False" AutoToolTipPlacement="None" AllowDrop="False" Height="23" VerticalAlignment="Center" VerticalContentAlignment="Center" HorizontalContentAlignment="Center" HorizontalAlignment="Center" Grid.Row="1" Margin="68,0,68,0"></Slider> <ProgressBar Height="6" Name="progressBar" Background="#00000000" BorderBrush="Black" VerticalContentAlignment="Center" HorizontalContentAlignment="Center" Margin="68,0,68,0" Grid.Row="1" IsHitTestVisible="False" BorderThickness="0" Foreground="#FF0089FF"></ProgressBar> <TextBlock Height="24" Name="speedTextBlock" Text="0x" Width="34" Background="{x:Null}" Foreground="White" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="460,7,0,0" FlowDirection="RightToLeft" Grid.Row="2" TextAlignment="Right"></TextBlock> </Grid> </Window>