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 = ;
this.Top = ;
InitializeComponent();
seekSlider.Width = SystemParameters.MaximizedPrimaryScreenWidth - ;
this.WindowState = System.Windows.WindowState.Maximized;
timer = new DispatcherTimer();
timer.Interval = TimeSpan.FromSeconds();
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 < )
sec = "" + mediaElement.Position.Seconds.ToString();
else
sec = mediaElement.Position.Seconds.ToString(); if (mediaElement.Position.Minutes < )
min = "" + mediaElement.Position.Minutes.ToString();
else
min = mediaElement.Position.Minutes.ToString(); if (mediaElement.Position.Hours < )
hours = "" + 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 == )
{ 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();
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 < )
sec = "" + mediaElement.Position.Seconds.ToString();
else
sec = mediaElement.NaturalDuration.TimeSpan.Seconds.ToString(); if (mediaElement.NaturalDuration.TimeSpan.Minutes < )
min = "" + mediaElement.NaturalDuration.TimeSpan.Minutes.ToString();
else
min = mediaElement.NaturalDuration.TimeSpan.Minutes.ToString(); if (mediaElement.NaturalDuration.TimeSpan.Hours < )
hours = "" + mediaElement.NaturalDuration.TimeSpan.Hours.ToString();
else
hours = mediaElement.NaturalDuration.TimeSpan.Hours.ToString(); if (mediaElement.NaturalDuration.TimeSpan.Hours == )
{ 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 + ;
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 + ;
} //seek to desirable position of the file
private void seekSlider_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
TimeSpan ts = new TimeSpan(, , , , (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(, , , , (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 + ;
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 = ;
progressBar.Value = ;
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="" d:DesignWidth="">
<Grid x:Name="mainGrid" Background="#FF0A0A0A" Height="{Binding}">
<Grid.RowDefinitions>
<RowDefinition Height="286*" />
<RowDefinition Height="" />
<RowDefinition Height="" />
</Grid.RowDefinitions>
<MediaElement MediaEnded="mediaElement_MediaEnded" MediaOpened="mediaElement_MediaOpened" LoadedBehavior="Manual" HorizontalAlignment="Right" Name="mediaElement" VerticalAlignment="Bottom" Opacity="" AllowDrop="True" Stretch="Fill" IsMuted="False" />
<Button Content="打开" Height="" HorizontalAlignment="Left" Margin="220,0,0,0" Name="openFileButton" VerticalAlignment="Top" Width="" Click="openFileButton_Click" Background="#FF030303" Foreground="#FFE8E8E8" Grid.Row="" />
<Button x:Name="stopButton" Content="停止" Margin="149,0,0,0" Click="stopButton_Click" Background="#FF030303" Foreground="#FFE8E8E8" HorizontalAlignment="Left" Width="" Grid.Row="" />
<Slider Height="" HorizontalAlignment="Left" Margin="292,0,0,0" Name="volumeSlider" VerticalAlignment="Top" Width="" Value="0.5" Maximum="" SmallChange="0.01" LargeChange="0.1" Background="Black" Foreground="#FFDBDBDB" IsMoveToPointEnabled="True" Grid.Row=""></Slider>
<Slider Name="speedRatioSlider" VerticalAlignment="Center" Value="" Width="" Margin="385,0,0,0" Maximum="" SmallChange="" Background="Black" UseLayoutRounding="True" TickPlacement="BottomRight" Foreground="#FFDBDBDB" Height="" Grid.Row="" HorizontalAlignment="Left"></Slider>
<Button x:Name="pauseButton" Content="暂停" Margin="71,0,0,0" Click="pauseButton_Click" Background="#FF030303" Foreground="#FFE8E8E8" Width="" HorizontalAlignment="Left" Grid.Row="" />
<Button x:Name="playButton_" Content="播放" HorizontalAlignment="Left" Width="" Click="playButton__Click" ClipToBounds="True" Background="#FF030303" Foreground="#FFE8E8E8" Grid.Row="" Margin="4,0,0,0" />
<TextBlock Height="" Name="endTimeTextBlock" Text="00:00" Width="" Background="{x:Null}" Foreground="White" VerticalAlignment="Center" HorizontalAlignment="Right" Margin="495,0,0,0" FlowDirection="RightToLeft" Grid.Row="" TextAlignment="Center"></TextBlock>
<TextBlock Height="" Name="currentTimeTextBlock" Text="00:00" Width="" Background="Black" Foreground="#FFDBDBDB" TextAlignment="Center" HorizontalAlignment="Left" VerticalAlignment="Center" Margin="4,0,0,0" Grid.Row=""></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="" VerticalAlignment="Center" VerticalContentAlignment="Center" HorizontalContentAlignment="Center" HorizontalAlignment="Center" Grid.Row="" Margin="68,0,68,0"></Slider>
<ProgressBar Height="" Name="progressBar" Background="#00000000" BorderBrush="Black" VerticalContentAlignment="Center" HorizontalContentAlignment="Center" Margin="68,0,68,0" Grid.Row="" IsHitTestVisible="False" BorderThickness="" Foreground="#FF0089FF"></ProgressBar>
<TextBlock Height="" Name="speedTextBlock" Text="0x" Width="" Background="{x:Null}" Foreground="White" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="460,7,0,0" FlowDirection="RightToLeft" Grid.Row="" TextAlignment="Right"></TextBlock>
</Grid>
</Window>