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vb.net播放器算法 vb如何做视频播放器

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简单的播放器用vb.net怎么做啊右击工具箱/部件/WindowsMediaPlayer
//类模块Mmedia
Option Explicit
'-----------------------------------------------------
'Name:MMedia.cls
'Author:Peter Wright, For BG2VB4BG2VB5
'
'Notes:A multimedia class, which when turned
':into an object lets you load and play
':multimedia files, such as sound and
':video.
'-----------------------------------------------------
' -=-=-=- PROPERTIES -=-=-=-
' FilenameDetermines the name of the current file
' LengthThe length of the file (Read Only)
' PositionThe current position through the file
' StatusThe current status of the object (Read Only)
' WaitTrue/False...tells VB to wait until play done
' -=-=-=- METHODS -=-=-=-=-
' mmOpen FilenameOpens the requested filename
' mmCloseCloses the current file
【vb.net播放器算法 vb如何做视频播放器】' mmPausePauses playback of the current file
' mmStopStops playback ready for closedown
' mmSeek PositionSeeks to a position in the file
' mmPlayPlays the open file
'-------------------------------------------------------------
' NOTES
' -----
'
' Open a file, then play it. Pause it in response to a request
' from the user. Stop if you intend to seek to the start and
' play again. Close when you no longer want to play the file
'--------------------------------------------------------------
Private sAlias As String' Used internally to give an alias name to
' the multimedia resource
Private sFilename As String' Holds the filename internally
Private nLength As Single' Holds the length of the filename
' internally
Private nPosition As Single' Holds the current position internally
Private sStatus As String' Holds the current status as a string
Private bWait As Boolean' Determines if VB should wait until play
' is complete before returning.
'------------ API DECLARATIONS -------------
'note that this is all one code line:
Private Declare Function mciSendString Lib "winmm.dll" _
Alias "mciSendStringA" (ByVal lpstrCommand As String, _
ByVal lpstrReturnString As String, ByVal uReturnLength As Long, _
ByVal hwndCallback As Long) As Long
Public Sub mmOpen(ByVal sTheFile As String)
' Declare a variable to hold the value returned by mciSendString
Dim nReturn As Long
' Declare a string variable to hold the file type
Dim sType As String
' Opens the specified multimedia file, and closes any
' other that may be open
If sAlias"" Then
mmClose
End If
' Determine the type of file from the file extension
Select Case UCase$(Right$(sTheFile, 3))
Case "WAV"
sType = "Waveaudio"
Case "AVI"
sType = "AviVideo"
Case "MID"
sType = "Sequencer"
Case Else
' If the file extension is not known then exit the subroutine
Exit Sub
End Select
sAlias = Right$(sTheFile, 3)Minute(Now)
' At this point there is no file open, and we have determined the
' file type. Now would be a good time to open the new file.
' Note: if the name contains a space we have to enclose it in quotes
If InStr(sTheFile, " ") Then sTheFile = Chr(34)sTheFileChr(34)
nReturn = mciSendString("Open "sTheFile" ALIAS "sAlias _
" TYPE "sType" wait", "", 0, 0)
End Sub
Public Sub mmClose()
' Closes the currently opened multimedia file
' Declare a variable to hold the return value from the mciSendString
' command
Dim nReturn As Long
' If there is no file currently open then exit the subroutine
If sAlias = "" Then Exit Sub
nReturn = mciSendString("Close "sAlias, "", 0, 0)
sAlias = ""
sFilename = ""
End Sub
Public Sub mmPause()
' Pause playback of the file
' Declare a variable to hold the return value from the mciSendString
' command
Dim nReturn As Long
' If there is no file currently open then exit the subroutine
If sAlias = "" Then Exit Sub
nReturn = mciSendString("Pause "sAlias, "", 0, 0)
End Sub
Public Sub mmPlay()
' Plays the currently open file, from the current position
' Declare a variable to hold the return value from the mciSendString
' command
Dim nReturn As Long
' If there is no file currently open, then exit the routine
If sAlias = "" Then Exit Sub
' Now play the file
If bWait Then
nReturn = mciSendString("Play "sAlias" wait", "", 0, 0)
Else
nReturn = mciSendString("Play "sAlias, "", 0, 0)
End If
End Sub
Public Sub mmStop()
' Stop using a file totally, be it playing or whatever
' Declare a variable to hold the return value from mciSendString
Dim nReturn As Long
' If there is no file currently open then exit the subroutine
If sAlias = "" Then Exit Sub
nReturn = mciSendString("Stop "sAlias, "", 0, 0)
End Sub
Public Sub mmSeek(ByVal nPosition As Single)
' Seeks to a specific position within the file
' Declare a variable to hold the return value from the mciSendString
' function
Dim nReturn As Long
nReturn = mciSendString("Seek "sAlias" to "nPosition, "", 0, 0)
End Sub
Property Get Filename() As String
' Routine to return a value when the programmer asks the
' object for the value of its Filename property
Filename = sFilename
End Property
Property Let Filename(ByVal sTheFile As String)
' Routine to set the value of the filename property, should the programmer
' wish to do so. This implies that the programmer actually wants to open
' a file as well so control is passed to the mmOpen routine
mmOpen sTheFile
End Property
Property Get Wait() As Boolean
' Routine to return the value of the object's wait property.
Wait = bWait
End Property
Property Let Wait(bWaitValue As Boolean)
' Routine to set the value of the object's wait property
bWait = bWaitValue
End Property
Property Get Length() As Single
' Routine to return the length of the currently opened multimedia file
' Declare a variable to hold the return value from the mciSendString
Dim nReturn As Long, nLength As Integer
' Declare a string to hold the returned length from the mci Status call
Dim sLength As String * 255
' If there is no file open then return 0
If sAlias = "" Then
Length = 0
Exit Property
End If
nReturn = mciSendString("Status "sAlias" length", sLength, 255, 0)
nLength = InStr(sLength, Chr$(0))
Length = Val(Left$(sLength, nLength - 1))
End Property
Property Let Position(ByVal nPosition As Single)
' Sets the Position property effectively by seeking
mmSeek nPosition
End Property
Property Get Position() As Single
' Returns the current position in the file
' Declare a variable to hold the return value from mciSendString
Dim nReturn As Integer, nLength As Integer
' Declare a variable to hold the position returned
' by the mci Status position command
Dim sPosition As String * 255
' If there is no file currently opened then exit the subroutine
If sAlias = "" Then Exit Property
' Get the position and return
nReturn = mciSendString("Status "sAlias" position", sPosition, 255, 0)
nLength = InStr(sPosition, Chr$(0))
Position = Val(Left$(sPosition, nLength - 1))
End Property
Property Get Status() As String
' Returns the playback/record status of the current file
' Declare a variable to hold the return value from mciSendString
Dim nReturn As Integer, nLength As Integer
' Declare a variable to hold the return string from mciSendString
Dim sStatus As String * 255
' If there is no file currently opened, then exit the subroutine
If sAlias = "" Then Exit Property
nReturn = mciSendString("Status "sAlias" mode", sStatus, 255, 0)
nLength = InStr(sStatus, Chr$(0))
Status = Left$(sStatus, nLength - 1)
End Property
//窗体fm
Dim m As New Mmedia
Dim fn
Private Sub Command1_Click()
On Error GoTo r
dlg.ShowOpen
fn = dlg.Filename
m.mmOpen fn
r:
If Err Then MsgBox Err.Description
End Sub
Private Sub Command2_Click()
On Error GoTo rp
m.mmPlay
rp:
If Err Then MsgBox Err.Description
End Sub
Private Sub Command3_Click()
On Error GoTo rap
m.mmPause
rap:
If Err Then MsgBox Err.Description
End Sub
Private Sub Command4_Click()
On Error GoTo racp
m.mmStop
racp:
If Err Then MsgBox Err.Description
End Sub
如何用vb.net实现视频播放器编写vb.net代码来实现 。
引用控件来进行实现vb.net播放器算法，如WMP控件 。
vb.net中如何播放声音，是要什么控件嘛？My.Computer.Audio.Play("SoundFile.wav")
SoundFile.wav是你要播放的声音文件的路径
如何在VB.NET中调用MP3播放器工具栏里选择"添加,删除组件"
选择com组件
选择"Windows Media Player "
然后在界面上加入这个组件
代码
Private Sub Button1_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles Button1.Click
Const DATA_FILE_EXTENSION As String = ".mp3"
Dim dlgFileDialog As New OpenFileDialog
With dlgFileDialog
.Filter = DATA_FILE_EXTENSION_
" files (*"DATA_FILE_EXTENSION"|*"DATA_FILE_EXTENSION
.FilterIndex = 1
.RestoreDirectory = True
If .ShowDialog() = DialogResult.OK Then
'Play the sound file
Me.AxWindowsMediaPlayer1.URL = dlgFileDialog.FileName
End If
End With
End Sub
参考资料中可以看到很详细的步骤
vb.net 中 如何实现 播放mp3文件在.NET里，没有托管的音乐播放器，用API只能播放WAV格式，对于MP3等形式的音频文件，就要依赖于其他控件了，常用的就是
MediaPlayer 。使用方法：
在工具箱上点右键，选择“选择项目(Choose Items)” ， 切到COM选项卡，找到 Windows Media Player，勾选，确定
在t工具箱上，把刚才加入的MediaPlayer控件，拖放到窗体上
代码：
WindowsMediaPlayer1.URL = "mp3文件路径 ， 支持网络路径"
WindowsMediaPlayer1.Ctlcontrols.play
基本就OK了，至于其他的操作诸如下一曲上一曲暂停停止，直接看 WindowsMediaPlayer1.Ctlcontrols. 里面的方法吧 。
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