使用C#在WPF中使用Media Player [英] Media Player in WPF using C#

问题描述

我正在WPF中创建一个应用程序，并希望有一个播放音频和视频文件的媒体播放器.我已经创建了一个.但是问题是它可以正确编译并执行，但不能给我音频或视频输出.
我还向您发送了XAML和C#编码.如果可以的话请帮助我.
提前谢谢...

XAML编码:

I am creating a an application in WPF and want to have a media player that plays audio and video files. I have created one. But the problem is that it compiles and executes properly but does not give me audio or video output.
I am also sending you the XAML and C# coding of it. Please help me if possible.
Thanks in advance...

XAML Coding:

<pre lang="xml"><Window x:Class="MediaPlayer.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        Title="MainWindow" Height="350" Width="525">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="226*" />
            <RowDefinition Height="36*" />
        </Grid.RowDefinitions>
        <MediaElement x:Name="MediaEL" Grid.RowSpan="1" LoadedBehavior="Manual" UnloadedBehavior="Close" />
        <StackPanel Orientation="Horizontal" Grid.Row="1" HorizontalAlignment="Center">
            <Button x:Name="btnPlay" Content="Play" Click="btnPlay_Click"
                    Width="50" Height="25"/>
            <Button x:Name="btnStop" Content="Stop" Click="btnStop_Click"
                        Width="50" Height="25"/>
            <Button x:Name="btnMoveBackward" Content="Back" Click="btnMoveBackward_Click"
                        Width="50" Height="25"/>
            <Button x:Name="btnMoveForward" Content="Forward" Click="btnMoveForward_Click"
                    Width="50" Height="25"/>
            <Button x:Name="btnOpen" Content="Open" Click="btnOpen_Click"
                    Width="50" Height="25"/>
        </StackPanel>
    </Grid>
</Window

>



C#代码:

>



C# Code:

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 System.Windows.Forms;

namespace MediaPlayer
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
   public partial class MainWindow : Window
    {
        
        
        #region Constructor
        public MainWindow()
        {
            InitializeComponent();
            IsPlaying(false);
        }
        #endregion



    //****************************************** 
    #region IsPlaying(bool)
	private void IsPlaying(bool bValue)
	{
	btnStop.IsEnabled = bValue;
    btnMoveBackward.IsEnabled = bValue;
	btnMoveForward.IsEnabled = bValue;
    btnPlay.IsEnabled = bValue;
    }
    #endregion
    //***************************************
    
    #region Open Media
	private void btnOpen_Click(object sender, RoutedEventArgs e)
	{
	    OpenFileDialog ofd = new OpenFileDialog();
        ofd.Filter = "Audio and Video (*.mp3,*.wav,*.mpeg,*.wmv,*.avi)|*.mp3;*.wav;*.mpeg;*.wmv;*.avi"; // Filter files by extension
	    if (ofd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
	    {
	        MediaEL.Source = new Uri(ofd.FileName);
            btnPlay.IsEnabled = true;
	    }
	}
	#endregion

    //***************************************

      private void btnPlay_Click(object sender, RoutedEventArgs e)
      {
        IsPlaying(true);
        if (btnPlay.Content.ToString() == "Play")
	    {
	        MediaEL.Play();
	        btnPlay.Content = "Pause";
	    }
	    else
	    {
	        MediaEL.Pause();
	        btnPlay.Content = "Play";
	    }
     }
    
    //***************************************
    #region Stop
	private void btnStop_Click(object sender, RoutedEventArgs e)
	{
	    MediaEL.Stop();
	    btnPlay.Content = "Play";
	    IsPlaying(false);
	    btnPlay.IsEnabled = true;
	}
	#endregion
    //***************************************

        private void btnMoveBackward_Click(object sender, RoutedEventArgs e)
        {
            MediaEL.Position = MediaEL.Position + TimeSpan.FromSeconds(10);
        }

        private void btnMoveForward_Click(object sender, RoutedEventArgs e)
        {
            MediaEL.Position = MediaEL.Position - TimeSpan.FromSeconds(10);
        }

        


    }
}

此外，在阅读了某些博客之后，我了解到必须将media元素的加载的行为属性设置为手动.我也将这些更改纳入其中.但这仍然没有给我收获任何成果.只需遍历这段代码即可指导我解决这个问题.

Further, after reading certain blogs, I have learnt that one has to set the loaded behavior property of the media element as manual. I have also incorporated these changes in it. But still it did not reap me any fruits. Just go through this code and guide me in this concern.

推荐答案

这里有一个博客，解释了如何在WPF中创建媒体播放器:

http://www.studentguru.gr/blogs/dante/archive/2011/01/03/121754.aspx [ ^ ]

请检查第二部分.

在快速浏览了您提供的代码后，
也添加这些事件:
1)MediaOpened:将isPlaying设置为true
2)MediaEnded:通过提供MediaEL.stop()来停止MediaElement 3)将LoadBehavior设置为手动"
4)UnloadedBehavior停止

该博客具有完整的解决方案，也请查看其第二部分: http://www.studentguru.gr/blogs/dante/archive/2011/01/12/122329.aspx [

There is a blog here which explained how to create a Media Player in WPF :

http://www.studentguru.gr/blogs/dante/archive/2011/01/03/121754.aspx[^]

Do check out its second part.

Also after having a quick review of the code that you provided,
Add these events too :
1) MediaOpened : to set the isPlaying to true
2) MediaEnded : to stop the MediaElement by providing MediaEL.stop()
3) Set the LoadBehavior to Manual
4) UnloadedBehavior to Stop

The blog has the complete solution, check out its second part too : http://www.studentguru.gr/blogs/dante/archive/2011/01/12/122329.aspx[^]

All the best.

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