C# 如何自动播放列表框的下一项

我正在使用列表框在我的表单上播放媒体播放器中的文件，我正在使用下面的代码获取列表框中的文件，因为它会重新运行文件名，现在我可以播放列表框中的文件，现在我希望列表框中的下一项在一段时间间隔后自动播放。如何做到这一点

this.listBox1.DisplayMember = "Name";/*to display name on listbox*/
this.listBox1.ValueMember = "FullName";/*to fetch item value on listbox*/
listBox1.DataSource = GetFolder("..\\video\\"); /*gets folder path*/ 

private static List<FileInfo> GetFolder(string folder)
{
    List<FileInfo> fileList = new List<FileInfo>();

    foreach (FileInfo file in new DirectoryInfo(folder)
                                 .GetFiles("*.mpg",SearchOption.AllDirectories))
    {
        fileList.Add(file);
    }

    return fileList;
}

对于listBox1，我使用的是代码

    private void listBox1_SelectedIndexChanged(object sender, EventArgs e )
    {

        StreamWriter sw = new StreamWriter("..\\Debug\\List.txt", true);
        //Player.URL = Convert.ToString(listBox1.SelectedItem);
        string selectedItem = listBox1.Items[listBox1.SelectedIndex].ToString();


        //listView1.Items.Add(listBox1.SelectedItem.ToString());

        foreach (object o in listBox1.SelectedItems)
            sw.WriteLine(DateTime.Now + " - " + o);

        sw.Close();


    }

然后，我使用一个按钮将选定的listbox1文件传输到另一个表单上的listBox2

   private void button1_Click_1(object sender, EventArgs e)
    {

        System.Text.StringBuilder sb = new System.Text.StringBuilder();
        foreach (object item in listBox1.Items)
        {
            sb.Append(item.ToString());
            sb.Append(" ");

        }


       string selectedItem = listBox1.Items[listBox1.SelectedIndex].ToString();


            //listBox2.Items.Add(listBox1.SelectedItem.ToString());
            Form3 frm = new Form3();

            foreach (int i in listBox1.SelectedIndices)
            {

                    frm.listBox2.Items.Add(listBox1.Items[i].ToString());


                frm.Show();
                this.Hide();

            }

        }

上面提到了listbox2代码。

您必须拦截播放器的输入。一旦获得

int

值

8

，即

MediaEnded

，您就可以在所需的时间间隔后播放列表中的下一个视频

[UPDATE]-这不适用于.NET 2.0，因此从答案末尾的[EDIT]获取

Form3.cs

的正确版本

以下是

Form3.cs

（.NET4.5）：

[编辑]-这应该适用于.NET 2.0

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using WMPLib;

namespace WindowsFormsApplication10
{
    public partial class Form3 : Form
    {
        System.Timers.Timer _timer = new System.Timers.Timer();
        object _locker = new object();

        public Form3()
        {
            InitializeComponent();

            this.listBox2.DisplayMember = "Name";/*to display name on listbox*/
            this.listBox2.ValueMember = "FullName";/*to fetch item value on listbox*/
            Player.PlayStateChange += Player_PlayStateChange;

            _timer.Elapsed += _timer_Elapsed;
            _timer.Interval = 3000;

        }

        void _timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            _timer.Stop();
            lock (_locker)
            {
                this.Invoke((MethodInvoker)delegate
                {
                    if (listBox2.SelectedIndex + 1 < listBox2.Items.Count)
                    {
                        listBox2.SelectedItem = listBox2.Items[listBox2.SelectedIndex + 1];
                    }
                });
            }
        }

        void Player_PlayStateChange(object sender, AxWMPLib._WMPOCXEvents_PlayStateChangeEvent e)
        {
            if ((WMPLib.WMPPlayState)e.newState == WMPLib.WMPPlayState.wmppsMediaEnded)
            {
                _timer.Start();
            }
            else if ((WMPLib.WMPPlayState)e.newState == WMPLib.WMPPlayState.wmppsReady)
            {
                Player.Ctlcontrols.play();
            }
        }

        private void listBox2_SelectedIndexChanged(object sender, EventArgs e)
        {
            Player.URL = Convert.ToString(listBox2.SelectedItem.GetType().GetProperty("FullName").GetValue(listBox2.SelectedItem, null)).ToString();
        }
    }
}

使用系统；
使用System.Collections.Generic；
使用系统组件模型；
使用系统数据；
使用系统图；
使用系统文本；
使用System.Windows.Forms；
使用WMPLib；
命名空间Windows窗体应用程序10
{
公共部分类表单3：表单
{
System.Timers.Timer _Timer=新的System.Timers.Timer（）；
对象_locker=新对象（）；
公共表格3（）
{
初始化组件（）；
this.listBox2.DisplayMember=“Name”/*在列表框上显示名称*/
this.listBox2.ValueMember=“FullName”/*获取列表框上的项目值*/
Player.PlayStateChange+=Player\u PlayStateChange；
_timer.appeated+=\u timer\u appeated；
_定时器间隔=3000；
}
无效_timer_已过（对象发送器，System.Timers.ElapsedEventArgs e）
{
_timer.Stop（）；
锁（储物柜）
{
此.Invoke（（MethodInvoker）委托
{
如果（listBox2.SelectedIndex+1

您使用的播放器是什么？您能简单地挂接一些事件，让您知道何时完成再次更改

.URI

吗？我正在使用axWindowsMediaPlayerAlex我尝试了您的代码，但它显示了一些错误错误错误1类中的无效标记“void”，struct，或接口成员声明D:\.net\WindowsApplication1\WindowsApplication1\Form3.cs 52 15 WindowsApplication1当我将async更改为private时，它显示错误1方法“GetValue”没有重载接受“1”参数D:\.net\WindowsApplication1\WindowsApplication1\Form3.cs 45 43 WindowsApplication1，并且在等待的行上也有错误..什么错误？你是否通过表单的设计器添加了播放器？好的，我将发布整个文件内容。可能有一些不匹配的偏执。好的，发布了

Form3.cs

的代码，还添加了

Form1.cs

的代码。Alex该代码不适用于我bro..System.Linq和System.Threading显示名称空间错误..我想告诉大家我正在使用visual studio 2005进行此操作。这是一个问题吗？

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using WMPLib;

namespace WindowsFormsApplication10
{
    public partial class Form3 : Form
    {
        public Form3()
        {
            InitializeComponent();

            this.listBox2.DisplayMember = "Name";/*to display name on listbox*/
            this.listBox2.ValueMember = "FullName";/*to fetch item value on listbox*/
            Player.PlayStateChange += Player_PlayStateChange;
        }

        async void Player_PlayStateChange(object sender, AxWMPLib._WMPOCXEvents_PlayStateChangeEvent e)
        {
            if ((WMPLib.WMPPlayState)e.newState == WMPLib.WMPPlayState.wmppsMediaEnded)
            {
                if (listBox2.SelectedIndex + 1 < listBox2.Items.Count)
                {
                    await System.Threading.Tasks.Task.Delay(3000);
                    listBox2.SelectedItem = listBox2.Items[listBox2.SelectedIndex + 1];
                }
            }
        }

        private void listBox2_SelectedIndexChanged(object sender, EventArgs e)
        {
            Player.URL = Convert.ToString(listBox2.SelectedItem.GetType().GetProperty("FullName").GetValue(listBox2.SelectedItem)).ToString();
            Player.Ctlcontrols.play();
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
//using System.Linq;
using System.Text;
//using System.Threading.Tasks;
using System.Windows.Forms;

namespace WindowsFormsApplication10
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.listBox1.DisplayMember = "Name";/*to display name on listbox*/
            this.listBox1.ValueMember = "FullName";/*to fetch item value on listbox*/
            listBox1.DataSource = GetFolder("..\\video\\"); /*gets folder path*/ 
        }

        private static List<FileInfo> GetFolder(string folder)
        {
            List<FileInfo> fileList = new List<FileInfo>();
            foreach (FileInfo file in new DirectoryInfo(folder)
                                         .GetFiles("*.mpg", SearchOption.AllDirectories))
            {
                fileList.Add(file);
            }
            return fileList;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Form3 frm = new Form3();
            frm.FormClosed += frm_FormClosed;

            foreach (int i in listBox1.SelectedIndices)
            {
                frm.listBox2.Items.Add(new 
                { 
                    Name = ((FileInfo)listBox1.Items[i]).Name, 
                    FullName = ((FileInfo)listBox1.Items[i]).FullName 
                });
                frm.Show();
                this.Hide();
            }
        }

        void frm_FormClosed(object sender, FormClosedEventArgs e)
        {
            this.Show();
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using WMPLib;

namespace WindowsFormsApplication10
{
    public partial class Form3 : Form
    {
        System.Timers.Timer _timer = new System.Timers.Timer();
        object _locker = new object();

        public Form3()
        {
            InitializeComponent();

            this.listBox2.DisplayMember = "Name";/*to display name on listbox*/
            this.listBox2.ValueMember = "FullName";/*to fetch item value on listbox*/
            Player.PlayStateChange += Player_PlayStateChange;

            _timer.Elapsed += _timer_Elapsed;
            _timer.Interval = 3000;

        }

        void _timer_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            _timer.Stop();
            lock (_locker)
            {
                this.Invoke((MethodInvoker)delegate
                {
                    if (listBox2.SelectedIndex + 1 < listBox2.Items.Count)
                    {
                        listBox2.SelectedItem = listBox2.Items[listBox2.SelectedIndex + 1];
                    }
                });
            }
        }

        void Player_PlayStateChange(object sender, AxWMPLib._WMPOCXEvents_PlayStateChangeEvent e)
        {
            if ((WMPLib.WMPPlayState)e.newState == WMPLib.WMPPlayState.wmppsMediaEnded)
            {
                _timer.Start();
            }
            else if ((WMPLib.WMPPlayState)e.newState == WMPLib.WMPPlayState.wmppsReady)
            {
                Player.Ctlcontrols.play();
            }
        }

        private void listBox2_SelectedIndexChanged(object sender, EventArgs e)
        {
            Player.URL = Convert.ToString(listBox2.SelectedItem.GetType().GetProperty("FullName").GetValue(listBox2.SelectedItem, null)).ToString();
        }
    }
}