wpf实现简单媒体播放效果
前台：
<Window x:Class="WpfApplication1.Window3" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="媒体播放器" Height="500" Width="800" Loaded="Window_Loaded"> <Grid Background="#2D2C31"> <Grid.ColumnDefinitions> <ColumnDefinition Width="600"></ColumnDefinition> <ColumnDefinition Width="*"></ColumnDefinition> </Grid.ColumnDefinitions> <Grid Grid.Column="1"> <Grid.RowDefinitions> <RowDefinition Height="30"></RowDefinition> <RowDefinition Height="155*"></RowDefinition> <RowDefinition Height="276*" /> </Grid.RowDefinitions> <Label Grid.Row="0" VerticalAlignment="Center" HorizontalAlignment="Center" FontSize="16" Foreground="#FF9AE500">播放列表</Label> <ListView Name="listView1" SelectionMode="Single" IsSynchronizedWithCurrentItem="{x:Null}" Margin="1,1,5,5" Grid.Row="1" Background="#2D2C31" Foreground="#FF9AE500" FontSize="13" Grid.RowSpan="2" SelectionChanged="listView1_SelectionChanged"> <ListBox.ContextMenu> <ContextMenu> <MenuItem Header="添加单个媒体文件" Click="MenuItem_Click"> </MenuItem> <MenuItem Header="删除单个媒体文件" Click="MenuItem_Click_1"> </MenuItem> <MenuItem Header="清空列表" Click="MenuItem_Click_2"> </MenuItem> </ContextMenu> </ListBox.ContextMenu> </ListView> </Grid> <Grid Grid.Column="0"> <Grid.RowDefinitions> <RowDefinition Height="*"></RowDefinition> <RowDefinition Height="40"></RowDefinition> </Grid.RowDefinitions> <MediaElement LoadedBehavior="Manual" Volume="{Binding ElementName=volumeSlider, Path=Value}" Grid.Row="0" Name="mediaElement1" Margin="10,10,5,10" MediaEnded="mediaElement1_MediaEnded" /> <Grid Grid.Row="1"> <Grid.ColumnDefinitions> <ColumnDefinition Width="150"></ColumnDefinition> <ColumnDefinition Width="80"></ColumnDefinition> <ColumnDefinition Width="80"></ColumnDefinition> <ColumnDefinition Width="80"></ColumnDefinition> <ColumnDefinition Width="*"></ColumnDefinition> </Grid.ColumnDefinitions> <Button Background="{x:Null}" Content="播 放" Cursor="Hand" FontSize="14" Foreground="#FF9AE500" Margin="80,5,20,5" Name="button3" Grid.Column="0" Click="button3_Click" /> <Button Background="{x:Null}" Content="停 止" Cursor="Hand" FontSize="14" Foreground="#FF9AE500" Margin="20,5,10,5" Name="button4" Grid.Column="1" Click="button4_Click" /> <Button Background="{x:Null}" Content="快 进" Cursor="Hand" FontSize="14" Foreground="#FF9AE500" Margin="20,5,10,5" Name="button5" Grid.Column="2" Click="button5_Click" /> <Button Background="{x:Null}" Content="快 退" Cursor="Hand" FontSize="14" Foreground="#FF9AE500" Margin="20,5,10,5" Name="button6" Grid.Column="3" Click="button6_Click" /> <TextBlock Grid.Row="4" Margin="4,10,4,5" Name="textBlock1" Text="音量:" Foreground="#FF9AE500" FontSize="14" Grid.Column="4" /> <Slider x:Name="volumeSlider" Minimum="0" Maximum="1" Value="0.5" Margin="37,10,0,13" Grid.Column="4" HorizontalAlignment="Left" Width="159" /> </Grid> </Grid> </Grid> </Window>
后台：
1 string root = "", pathMedia = ""; 2 StringBuilder sb = new StringBuilder(); 3 List<string> str8 = new List<string>(); 4 byte[] bs; 5 string path = "D:\\"; 6 public Window3() 7 { 8 InitializeComponent(); 9 InitPath(); 10 } 11 public void InitPath() 12 { 13 14 } 15 private void listView1_SelectionChanged(object sender, SelectionChangedEventArgs e) 16 { 17 string fileName = this.listView1.SelectedValue.ToString(); 18 this.mediaElement1.Source = new Uri(path + "//" + fileName); 19 this.mediaElement1.Play(); 20 } 21 22 private void MenuItem_Click(object sender, RoutedEventArgs e) 23 { 24 OpenFileDialog ofp = new OpenFileDialog(); 25 ofp.Multiselect = true; 26 ofp.ShowDialog(); 27 if (ofp.FileName == "") 28 { 29 MessageBox.Show("请选择正确的文件"); 30 return; 31 } 32 33 for (int i = 0; i <= ofp.FileNames.Count() - 1; i++) 34 { 35 sb.Append(ofp.FileNames[i]); 36 sb.Append("\r\n"); 37 if (ofp.SafeFileNames[i] != "") 38 { 39 listView1.Items.Add(ofp.SafeFileNames[i]); 40 str8.Add(ofp.FileNames[i].Substring(0, ofp.FileNames[i].LastIndexOf("\\") + 1)); 41 } 42 } 43 FileStream fs = new FileStream(AppDomain.CurrentDomain.BaseDirectory + "\\媒体列表.txt", FileMode.Append, FileAccess.Write, FileShare.ReadWrite); 44 bs = Encoding.Default.GetBytes(sb.ToString()); 45 fs.Write(bs, 0, bs.Length); 46 fs.Flush(); 47 fs.Close(); 48 49 } 50 51 private void MenuItem_Click_1(object sender, RoutedEventArgs e) 52 { 53 try 54 { 55 FileStream fs1 = new FileStream(AppDomain.CurrentDomain.BaseDirectory + "\\媒体列表.txt", FileMode.OpenOrCreate, FileAccess.Read, FileShare.ReadWrite); 56 byte[] bt = new byte[fs1.Length]; 57 fs1.Read(bt, 0, bt.Length); 58 fs1.Dispose(); 59 string str = Encoding.Default.GetString(bt); 60 string[] s = str.Split(new string[] { "\r\n" }, StringSplitOptions.None); 61 List<string> list = new List<string>(s); 62 if (listView1.SelectedItem != null) 63 { 64 for (int i = 0; i < s.Length - 1; i++) 65 { 66 if (s[i].Contains(listView1.SelectedItem.ToString())) 67 { 68 list.RemoveAt(i); 69 } 70 } 71 } 72 s = (string[])list.ToArray(); 73 FileInfo file = new FileInfo(AppDomain.CurrentDomain.BaseDirectory + "\\媒体列表.txt"); 74 file.Refresh(); 75 file.Delete(); 76 List<string> li = new List<string>(); 77 li = s.Distinct().ToList(); 78 StringBuilder sb = new StringBuilder(); 79 for (int i = 0; i <= li.Count - 1; i++) 80 { 81 sb.Append(li[i]); 82 sb.Append("\r\n"); 83 } 84 FileStream fs2 = new FileStream(AppDomain.CurrentDomain.BaseDirectory + "\\媒体列表.txt", FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite); 85 bs = Encoding.Default.GetBytes(sb.ToString()); 86 fs2.Write(bs, 0, bs.Length); 87 fs2.Flush(); 88 fs2.Close(); 89 } 90 catch 91 { 92 93 } 94 95 listView1.Items.Remove(listView1.SelectedItem); 96 97 } 98 99 private void MenuItem_Click_2(object sender, RoutedEventArgs e) 100 { 101 listView1.Items.Clear(); 102 FileInfo file = new FileInfo(AppDomain.CurrentDomain.BaseDirectory + "\\媒体列表.txt"); 103 file.Refresh(); 104 file.Delete(); 105 106 } 107 108 private void Window_Loaded(object sender, RoutedEventArgs e) 109 { 110 111 } 112 private void button3_Click(object sender, RoutedEventArgs e) 113 { 114 if (button3.Content.ToString() == "播 放") 115 { 116 mediaElement1.Play(); 117 button3.Content = "暂 停"; 118 } 119 else 120 { 121 mediaElement1.Pause(); 122 button3.Content = "播 放"; 123 } 124 } 125 126 private void button4_Click(object sender, RoutedEventArgs e) 127 { 128 this.mediaElement1.Stop(); 129 } 130 131 private void button5_Click(object sender, RoutedEventArgs e) 132 { 133 mediaElement1.Position = mediaElement1.Position + TimeSpan.FromSeconds(10); 134 } 135 136 private void button6_Click(object sender, RoutedEventArgs e) 137 { 138 mediaElement1.Position = mediaElement1.Position - TimeSpan.FromSeconds(10); 139 }
