1.解释说明

        - 这个可以搭配文件下载来一起使用，方便管理下载的资源

        - 该程序包含xaml部分和cs部分，这里将分开来进行说明

        - 该程序有双击打开对应资源的功能

2.xaml程序示例

        - <ListView.View>为要显示的视图，这里是显示文件的名字和日期

        - <ListView.ContextMenu>为右键鼠标的菜单属性，这里有个文件打开和删除功能

        - 这里要注意的是MouseLeftButtonUp鼠标左键弹起事件，当时设置的鼠标左键按下，但是没有生效，所以用的弹起事件

<ListView  Grid.Column="0"  x:Name="fileListView" MouseDoubleClick="FileListView_MouseDoubleClick" MouseLeftButtonUp="ViewPreview">

    <ListView.View>
        <GridView>
            <GridViewColumn DisplayMemberBinding="{Binding Name}" Header="文件名" Width="280"/>
            <GridViewColumn DisplayMemberBinding="{Binding CreationTime}" Header="日期" Width="150"/>
        </GridView>
    </ListView.View>

    <ListView.ContextMenu>
        <ContextMenu>
            <MenuItem Header="打开" Click="OpenMenuItem_Click"/>
            <MenuItem Header="删除" Click="DeleteMenuItem_Click"/>
        </ContextMenu>
    </ListView.ContextMenu>

</ListView>

3.cs程序示例

        - LoadFilesInFolder为加载文件夹的功能，这里的folderPath写上对应文件夹的地址即可，例如LoadFilesInFolder("C:\\User\\View");

        - ViewPreview这里自定义了一个文件缩略图预览功能，可以展示对应的png和mp4文件

        - FileListView_MouseDoubleClick为鼠标的双击事件，这里调用的打开文件功能

        - OpenMenuItem_Click为右键菜单的打开事件

        - DeleteMenuItem_Click为右键删除功能，这里删除文件后要更新文件夹

        - OpenFile为多次调用的打开文件事件

private void LoadFilesInFolder(string folderPath)
{
    if (Directory.Exists(folderPath))
    {
        var files = Directory.GetFiles(folderPath, "*.*").Where(f => f.EndsWith(".mp4") || f.EndsWith(".png"));
        fileListView.ItemsSource = files.Select(f => new FileInfo(f)).ToList();
    }
    else
    {
        MessageBox.Show("文件夹不存在！");
    }
}

private void ViewPreview(object sender, MouseButtonEventArgs e)
{
    var fileInfo = fileListView.SelectedItem as FileInfo;
    if (fileInfo != null)
    {
        try
        {
            string fileExtension = System.IO.Path.GetExtension(fileInfo.FullName).ToLowerInvariant();

            switch (fileExtension)
            {
                case ".mp4":
                    newvideo.Visibility = Visibility.Visible;
                    newvideo.Play();
                    newvideo.Source = new Uri(fileInfo.FullName, UriKind.Absolute);
                    newpicture.Visibility = Visibility.Hidden;
                    break;
                case ".png":
                    newpicture.Visibility= Visibility.Visible;
                    newpicture.Source = new BitmapImage(new Uri(fileInfo.FullName, UriKind.Absolute));
                    newvideo.Pause();
                    newvideo.Visibility = Visibility.Hidden;
                    break;
                default:
                    MessageBox.Show($"Unsupported file type: {fileExtension}");
                    break;
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show($"Error opening file: {ex.Message}");
        }
    }
}

private void FileListView_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
    var fileInfo = fileListView.SelectedItem as FileInfo;
    if (fileInfo != null)
    {
        OpenFile(fileInfo.FullName);
    }
}

private void OpenMenuItem_Click(object sender, RoutedEventArgs e)
{
    var fileInfo = fileListView.SelectedItem as FileInfo;
    if (fileInfo != null)
    {
        OpenFile(fileInfo.FullName);
    }
}

private void DeleteMenuItem_Click(object sender, RoutedEventArgs e)
{
    var fileInfo = fileListView.SelectedItem as FileInfo;
    if (fileInfo != null)
    {
        string message = $"你确定删除 '{fileInfo.Name}'?";
        MessageBoxResult result = MessageBox.Show(message, "Delete Confirmation", MessageBoxButton.YesNo, MessageBoxImage.Warning);

        if (result == MessageBoxResult.Yes)
        {
            try
            {
                System.IO.File.Delete(fileInfo.FullName);

                var observableCollection = fileListView.ItemsSource as ObservableCollection<FileInfo>;
                if (observableCollection != null)
                {
                    observableCollection.Remove(fileInfo);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show($"Error deleting file: {ex.Message}");
            }
        }
    }
    else
    {
        MessageBox.Show("没有选择要删除的文件！");
    }
    LoadFilesInFolder("C:\\User\\View");
}

private void OpenFile(string filePath)
{
    try
    {
        string fileExtension = System.IO.Path.GetExtension(filePath).ToLowerInvariant();

        switch (fileExtension)
        {
            case ".mp4":
                ProcessStartInfo processStartInfo = new ProcessStartInfo();
                processStartInfo.FileName = filePath;
                processStartInfo.UseShellExecute = true; // Allows the operating system to handle the specified file.
                processStartInfo.Verb = "open"; // The default verb is "open".
                Process.Start(processStartInfo);
                break;
            case ".png":
                ProcessStartInfo eprocessStartInfo = new ProcessStartInfo();
                eprocessStartInfo.FileName = filePath;
                eprocessStartInfo.UseShellExecute = true; // Allows the operating system to handle the specified file.
                eprocessStartInfo.Verb = "open"; // The default verb is "open".
                Process.Start(eprocessStartInfo);
                break;
            default:
                MessageBox.Show($"Unsupported file type: {fileExtension}");
                break;
        }
    }
    catch (Exception ex)
    {
        MessageBox.Show($"Error opening file: {ex.Message}");
    }
}