[英]How to automatically play next item of a listBox
我正在使用listBox從窗體上的媒體播放器播放文件,我正在使用下面的代碼在我的列表框中獲取文件,因為它重新調整了文件名,現在我可以從listBox播放文件,現在我想要下一個項目在列表框中有一個時間間隔后會自動播放。
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;
}
對於列表框,我正在使用以下代碼
private void listBox2_SelectedIndexChanged(object sender, EventArgs e)
{
Player.URL = Convert.ToString(listBox2.SelectedItem);
}
對於listBox1我正在使用代碼
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();
}
然后我使用一個按鈕將選定的listbox1文件傳輸到另一種表單上的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代碼。
您必須攔截播放器的PlayStateChange
。 獲得int
值8
(即MediaEnded
,您可以在所需的時間間隔后播放列表中的下一個視頻。
[更新]-這不適用於.NET 2.0,因此請在答案末尾的[編輯]中獲取Form3.cs
的正確版本。
這是Form3.cs
(.NET 4.5):
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();
}
}
}
這是Form1.cs
(.NET 4.5):
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();
}
}
}
[編輯]-這應該適用於.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();
}
}
}
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