MyMusic Player, How to implement a simple MP3 Player Options

[AdamSpeight2008]

MyMusic Player

Modification: You'll need to add a COM Reference Windows Media Player (the one with path that ends InterOp.WMPLib.dll)

Start a new Windows Form Application project
Ingredients
3 x Buttons
But_Play
But_Pause
But_Stop
2 x Textboxes
Txt_TrackName
Txt_Progress
These need to be readonly
2 x TrackBar
TrackPosition
Volume (Vertical orientation, Minimum =0. Maximum=100)
1 x Timer
Timer1
1 x Listview (Multi Select = False, View=Details, HeaderStyle None)
Add one column called TrackCol


The code
View the code for Form1 and insert the following code

vb

Public Class Form1
#Region "Color Settings"
    Dim CurrentTrackColor As System.Drawing.Color = Color.Red
    Dim PausedTrackColor As System.Drawing.Color = Color.LightYellow
#End Region
    Dim WithEvents Player As New WMPLib.WindowsMediaPlayer
    Dim files As Collections.ObjectModel.ReadOnlyCollection(Of String)
    Dim titles As New List(Of String)
    Dim CurrentPlaying As Integer = 0
    Dim PreviouslyPlaying As Integer = 0

    Private Sub Form1_FormClosed(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosedEventArgs) Handles Me.FormClosed
        ' Dispose of player
        Player = Nothing
    End Sub

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        TrackCol.Width = TrackList.Width - 20
        But_Pause.Enabled = False
        But_Stop.Enabled = False
        files = FileIO.FileSystem.GetFiles(My.Computer.FileSystem.SpecialDirectories.MyMusic, FileIO.SearchOption.SearchAllSubDirectories, "*.mp3")
        For Each a As String In files
            Me.TrackList.Items.Add(FileIO.FileSystem.GetName(a))
        Next
        Volume.Value = Player.settings.volume
        Me.Txt_TrackName.Text = Player.URL
        Player.settings.autoStart = False
        Player.URL = files(0)
        Player.enableContextMenu = False
        With Me.Timer1
            .Interval = 500
            .Start()
            .Enabled = True
        End With
    End Sub

    Private Sub Form1_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
        ' Form is closing, so shutdown player
        Player.close()
    End Sub

    Private Sub ClickedOnPlayButton(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles But_Play.Click
        GUIMode("Play")
        updatePlayer()
        Player.controls.play()
    End Sub

    Private Sub ClickedOnStopNutton(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles But_Stop.Click
        Player.controls.stop()
        GUIMode("Stopped")
    End Sub

    Private Sub ClickedOnPauseButton(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles But_Pause.Click
        If Player.playState = WMPLib.WMPPlayState.wmppsPaused Then
            GUIMode("Play")
        Else
            GUIMode("Paused")
        End If
    End Sub

    Private Sub GUIMode(ByRef Guimode As String)
        Select Case Guimode
            Case "Play"
                ' Put GUI in playing mode guise
                Player.controls.play()
                But_Pause.BackColor = System.Drawing.SystemColors.Control
                But_Pause.Enabled = True
                But_Stop.Enabled = True
                But_Play.Enabled = True
            Case "Paused"
                ' put gui in paused mode guise
                But_Pause.Enabled = True
                But_Stop.Enabled = False
                But_Play.Enabled = False
                But_Pause.BackColor = PausedTrackColor
                Player.controls.pause()
            Case "Stopped"
                But_Pause.Enabled = False
                But_Stop.Enabled = False

        End Select
    End Sub

    Private Sub ScrollingVolume(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Volume.Scroll
        ' Change the player's volume
        Player.settings.volume = Volume.Value
    End Sub

    Private Sub Player_MediaError(ByVal pMediaObject As Object) Handles Player.MediaError
        MessageBox.Show("Unrecoverable Problem. Shutting Down", "MyMusic Player")
        Me.Close()
    End Sub

    Private Sub Player_PlayStateChange(ByVal NewState As Integer) Handles Player.PlayStateChange
        Static Dim PlayAllowed As Boolean = True
        Select Case CType(NewState, WMPLib.WMPPlayState)
            Case WMPLib.WMPPlayState.wmppsReady
                If PlayAllowed Then
                    Player.controls.play()
                End If
            Case WMPLib.WMPPlayState.wmppsMediaEnded
                ' Reach end of track move onto next, looping around
                PreviouslyPlaying = CurrentPlaying
                CurrentPlaying = (CurrentPlaying + 1) Mod files.Count
                ' Start protection (without it next wouldn't play
                PlayAllowed = False
                ' Play track
                Player.URL = files(CurrentPlaying)
                Player.controls.play()
                ' End Protection
                PlayAllowed = True
                updatePlayer()
        End Select

    End Sub

    Private Sub updatePlayer()
        ' Display track name
        Txt_TrackName.Text = Player.currentMedia.name
        ' Update TrackPostion
        With TrackPosition
            .Minimum = 0
            .Maximum = CInt(Player.currentMedia.duration)
            .Value = CInt(Player.controls.currentPosition())
        End With
        ' Display Current Time Position and Duration
        Txt_Progress.Text = Player.controls.currentPositionString & vbTab & Player.currentMedia.durationString
        ' Set Volume slide to match current volume
        Volume.Value = Player.settings.volume
        ' Is the CurrentPlaying Track No. is different to the Previous Track number.
        If CurrentPlaying <> PreviouslyPlaying Then
            ' Yes, 
            ' Set the forecolor of the corrisponding track, assiociated with the previous playing track, with the control color
            TrackList.Items(PreviouslyPlaying).ForeColor = System.Drawing.SystemColors.ControlText
        End If
        ' Set the forecolor of the corrisponding track, assiociated with the currently playing track, with the current track color
        TrackList.Items(CurrentPlaying).ForeColor = CurrentTrackColor

    End Sub

    Private Sub Tracks_MouseDoubleClick(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles TrackList.MouseDoubleClick
        GUIMode("Play")

        ' A track in the tracklisting has been double clicked on
        PreviouslyPlaying = CurrentPlaying
        ' Set CurrentPlaying to position of selected track.
        CurrentPlaying = TrackList.SelectedIndices(0)
        ' Play the track
        Player.URL = files(CurrentPlaying)
        updatePlayer()
        Player.controls.play()
    End Sub

    Private Sub ScrollingTrackPosition(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TrackPosition.Scroll
        ' Seek the through track
        Player.controls.pause()
        Player.controls.currentPosition = TrackPosition.Value
        Player.controls.play()
        updatePlayer()
        ' Allow the app to do some processing
        Application.DoEvents()
    End Sub

    Private Sub UpdatePlayerTimer(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
        updatePlayer()
    End Sub

End Class

Bake in a preheated over a gas mark 6 for 1 hour.

Here one I made earlier
 MediaPlayer.zip ( 923.23k ) Number of downloads: 1333

Run

Now enjoy!

This post has been edited by AdamSpeight2008: 15 Jul, 2008 - 03:03 AM

[jagatworld]

Hi,
Everything looks fine, but only for that , I'm unable to find this library / control ......

Dim WithEvents Player As New WMPLib.WindowsMediaPlayer
Error : Type 'WMPLib.WindowsMediaPlayer' is not defined.

it is giving error.
Should I import some control or add any reference?

I use VS 2005 Team Suite.

Thanks and Regards.

Jagat.

[AdamSpeight2008]

Hi,
Everything looks fine, but only for that , I'm unable to find this library / control ......

Dim WithEvents Player As New WMPLib.WindowsMediaPlayer
Error : Type 'WMPLib.WindowsMediaPlayer' is not defined.

it is giving error.
Should I import some control or add any reference?

I use VS 2005 Team Suite.

Thanks and Regards.

Jagat.

You'll need to add a COM Reference Windows Media Player (the one with path that ends InterOp.WMPLib.dll)

[Speedular]

Big thanks to you; it was very helpful;
I'm just wondering it there a way for example to make the player start at a certain position that I specify; let us say I've got the current position " position = player.Ctlcontrols.currentPosition" and I closed the player app and when I start it again I want it to start from that "position" is this possible?

[juunas]

Hey, I have a question about this part:

CODE

CurrentPlaying = (CurrentPlaying + 1) Mod files.Count

How exactly does that work? From what I know, modulus would do the job if it was the last song, returning 0. But what if say, you're at index 4 of the playlist, and theres a total of 10 songs, last index being 9. So, the calculation would be:

(4+1) Mod 10

5 Mod 10

Basically 5/10 is 0,5 so I dont know whats the remainder of that, care to explain? I know it works, its just that I want to understand it.

[AdamSpeight2008]

5 / 10 = 0 remainder 5
MOD is simply, give me the remainder from the division.

It simple way to implement continuous looping of all the songs.

[juunas]

Of course!! Dumb me!

Thanks, now I got it.

[hayt777]

So i downloaded your MediaPlayer.zip file.
I'm having the problem that it reads the mp3 files properly and places the track names and all that, then crashes with "unrecoverable error" msgbox.

MSVC Debugger says that

Player.URL = files(0)

Is at fault, and says index is out of range must be non-negative and less than the size of the collection.

The folder that is targeted for the player to read for mp3 files has only 1 mp3 file.

Any ideas why this is happening?

Edit: Ok, It appears to work fine on another one of my computers, just on the developing computer it has the index out of range issue.

However on another computer when you click the 'X' button to close the form, it closes and restarts the current track over again, and that track keeps playing over and over, and you cant stop it since the form was destroyed, if you open the form again, it will just start playing the first track again, mixing that with the already playing track.

I'm really confused now, any ideas would be greatly appreciated, thanks.

Another Quick Edit: Just Noticed that the player autostarts playing even though in the code the player settings are set to autostart = false


This post has been edited by hayt777: 27 May, 2009 - 11:17 PM

[AdamSpeight2008]

So i downloaded your MediaPlayer.zip file.
I'm having the problem that it reads the mp3 files properly and places the track names and all that, then crashes with "unrecoverable error" msgbox.

MSVC Debugger says that

Player.URL = files(0)

Is at fault, and says index is out of range must be non-negative and less than the size of the collection.

The folder that is targeted for the player to read for mp3 files has only 1 mp3 file.

Any ideas why this is happening?

It couldn't find the file!. Correction in code that follows.

Another Quick Edit: Just Noticed that the player autostarts playing even though in the code the player settings are set to autostart = false

Added a new constant at start

CODE

Const CONST_AutoPlayFirst As Boolean = False

Alter Form Load

CODE

If files.Count = 0 Then
   MessageBox.Show("No Music Files Found", My.Application.Info.Title, MessageBoxButtons.OK, MessageBoxIcon.Information)
   Me.Close()
   Exit Sub
  End If
  Player.settings.autoStart = CONST_AutoPlayFirst
  Player.enableContextMenu = False
  Player.settings.invokeURLs = False
  Player.URL = files(0)

Comment out the code

CODE

   Case WMPLib.WMPPlayState.wmppsReady
    'If PlayAllowed Then
    ' Player.controls.play()
    'End If

Edit: Ok, It appears to work fine on another one of my computers, just on the developing computer it has the index out of range issue.

However on another computer when you click the 'X' button to close the form, it closes and restarts the current track over again, and that track keeps playing over and over, and you cant stop it since the form was destroyed, if you open the form again, it will just start playing the first track again, mixing that with the already playing track.

I'm really confused now, any ideas would be greatly appreciated, thanks.

Try adding corrections.See what happens.