WPF MediaElement：视频打开了两次

Question

我想将 MediaPlayer 用于带有 MediaElement 的视频和图片。我已经做过测试，MediaElement也可以显示图片。目前我的问题是 MediaElement 似乎打开了两次。这是示例代码：

XAML：

<Window x:Class="TestMediaElement.MainWindow"

    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"

    xmlns:local="clr-namespace:TestMediaElement"

    mc:Ignorable="d"

    Title="MainWindow" Height="450" Width="800">

<Grid Margin="10">

    <MediaElement Name="mediaPlayer" MediaOpened="media_MediaOpened" LoadedBehavior="Play" UnloadedBehavior="Manual"/>

</Grid>

</Window>

C＃

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

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;

namespace TestMediaElement

{

public partial class MainWindow : Window

{

        int currentMediaIndex = 0;

        string[] Documents;

        public MainWindow()

        {

            InitializeComponent();

            Documents = System.IO.Directory.GetFiles("C:/Users/Feller/Desktop/Test/");

            Uri first = new Uri(Documents[0], UriKind.RelativeOrAbsolute);

            mediaPlayer.Source = first;

            mediaPlayer.MediaOpened += media_MediaOpened;       

        }

        private void media_MediaOpened(object sender, RoutedEventArgs e)

        {

            Console.WriteLine("Video opened");

        }

    }

}

另一个问题是图像会在大约 5 秒后自动关闭。谁能帮我解决这些问题？非常感谢！

Answer 1

MediaOpened 事件被订阅了两次。从 xaml 中删除或从代码中删除。&nbsp;&nbsp;&nbsp;&nbsp;//mediaPlayer.MediaOpened&nbsp;+=&nbsp;media_MediaOpened;