كود:
Imports WaveStreamVB
Public Class frmWaveStreamSample
Inherits System.Windows.Forms.Form
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
'Required by the Windows Form Designer
Private components As System.ComponentModel.IContainer
'NOTE: The following procedure is required by the Windows Form Designer
'It can be modified using the Windows Form Designer.
'Do not modify it using the code editor.
Friend WithEvents prgSave As System.Windows.Forms.ProgressBar
Friend WithEvents grpProperties As System.Windows.Forms.GroupBox
Friend WithEvents txtFrequency As System.Windows.Forms.TextBox
Friend WithEvents txtBitsPerSample As System.Windows.Forms.TextBox
Friend WithEvents txtChannels As System.Windows.Forms.TextBox
Friend WithEvents txtLength As System.Windows.Forms.TextBox
Friend WithEvents label4 As System.Windows.Forms.Label
Friend WithEvents label3 As System.Windows.Forms.Label
Friend WithEvents label2 As System.Windows.Forms.Label
Friend WithEvents label1 As System.Windows.Forms.Label
Friend WithEvents btnSave As System.Windows.Forms.Button
Friend WithEvents btnOpenSource As System.Windows.Forms.Button
Friend WithEvents txtSourceFile As System.Windows.Forms.TextBox
Friend WithEvents lblInput As System.Windows.Forms.Label
<System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
Me.prgSave = New System.Windows.Forms.ProgressBar()
Me.grpProperties = New System.Windows.Forms.GroupBox()
Me.txtFrequency = New System.Windows.Forms.TextBox()
Me.txtBitsPerSample = New System.Windows.Forms.TextBox()
Me.txtChannels = New System.Windows.Forms.TextBox()
Me.txtLength = New System.Windows.Forms.TextBox()
Me.label4 = New System.Windows.Forms.Label()
Me.label3 = New System.Windows.Forms.Label()
Me.label2 = New System.Windows.Forms.Label()
Me.label1 = New System.Windows.Forms.Label()
Me.btnSave = New System.Windows.Forms.Button()
Me.btnOpenSource = New System.Windows.Forms.Button()
Me.txtSourceFile = New System.Windows.Forms.TextBox()
Me.lblInput = New System.Windows.Forms.Label()
Me.grpProperties.SuspendLayout()
Me.SuspendLayout()
'
'prgSave
'
Me.prgSave.Location = New System.Drawing.Point(172, 224)
Me.prgSave.Name = "prgSave"
Me.prgSave.Size = New System.Drawing.Size(184, 24)
Me.prgSave.TabIndex = 13
'
'grpProperties
'
Me.grpProperties.Controls.AddRange(New System.Windows.Forms.Control()
{Me.txtFrequency, Me.txtBitsPerSample, Me.txtChannels, Me.txtLength,
Me.label4, Me.label3, Me.label2, Me.label1})
Me.grpProperties.FlatStyle = System.Windows.Forms.FlatStyle.System
Me.grpProperties.Location = New System.Drawing.Point(84, 64)
Me.grpProperties.Name = "grpProperties"
Me.grpProperties.Size = New System.Drawing.Size(276, 152)
Me.grpProperties.TabIndex = 12
Me.grpProperties.TabStop = False
Me.grpProperties.Text = "&Properties"
'
'txtFrequency
'
Me.txtFrequency.Location = New System.Drawing.Point(92, 96)
Me.txtFrequency.Name = "txtFrequency"
Me.txtFrequency.ReadOnly = True
Me.txtFrequency.Size = New System.Drawing.Size(180, 21)
Me.txtFrequency.TabIndex = 8
Me.txtFrequency.Text = ""
'
'txtBitsPerSample
'
Me.txtBitsPerSample.Location = New System.Drawing.Point(92, 72)
Me.txtBitsPerSample.Name = "txtBitsPerSample"
Me.txtBitsPerSample.ReadOnly = True
Me.txtBitsPerSample.Size = New System.Drawing.Size(180, 21)
Me.txtBitsPerSample.TabIndex = 7
Me.txtBitsPerSample.Text = ""
'
'txtChannels
'
Me.txtChannels.Location = New System.Drawing.Point(92, 48)
Me.txtChannels.Name = "txtChannels"
Me.txtChannels.ReadOnly = True
Me.txtChannels.Size = New System.Drawing.Size(180, 21)
Me.txtChannels.TabIndex = 6
Me.txtChannels.Text = ""
'
'txtLength
'
Me.txtLength.Location = New System.Drawing.Point(92, 20)
Me.txtLength.Name = "txtLength"
Me.txtLength.ReadOnly = True
Me.txtLength.Size = New System.Drawing.Size(180, 21)
Me.txtLength.TabIndex = 5
Me.txtLength.Text = ""
'
'label4
'
Me.label4.Location = New System.Drawing.Point(8, 100)
Me.label4.Name = "label4"
Me.label4.Size = New System.Drawing.Size(80, 20)
Me.label4.TabIndex = 4
Me.label4.Text = "&Frequency"
'
'label3
'
Me.label3.Location = New System.Drawing.Point(8, 76)
Me.label3.Name = "label3"
Me.label3.Size = New System.Drawing.Size(80, 20)
Me.label3.TabIndex = 3
Me.label3.Text = "&Bits/Sample"
'
'label2
'
Me.label2.Location = New System.Drawing.Point(8, 48)
Me.label2.Name = "label2"
Me.label2.Size = New System.Drawing.Size(80, 20)
Me.label2.TabIndex = 2
Me.label2.Text = "&Channels"
'
'label1
'
Me.label1.Location = New System.Drawing.Point(8, 24)
Me.label1.Name = "label1"
Me.label1.Size = New System.Drawing.Size(80, 20)
Me.label1.TabIndex = 1
Me.label1.Text = "&Length"
'
'btnSave
'
Me.btnSave.FlatStyle = System.Windows.Forms.FlatStyle.System
Me.btnSave.Location = New System.Drawing.Point(84, 224)
Me.btnSave.Name = "btnSave"
Me.btnSave.Size = New System.Drawing.Size(80, 24)
Me.btnSave.TabIndex = 11
Me.btnSave.Text = "&Save..."
'
'btnOpenSource
'
Me.btnOpenSource.FlatStyle = System.Windows.Forms.FlatStyle.System
Me.btnOpenSource.Location = New System.Drawing.Point(84, 32)
Me.btnOpenSource.Name = "btnOpenSource"
Me.btnOpenSource.Size = New System.Drawing.Size(80, 24)
Me.btnOpenSource.TabIndex = 10
Me.btnOpenSource.Text = "&Open..."
'
'txtSourceFile
'
Me.txtSourceFile.Location = New System.Drawing.Point(84, 4)
Me.txtSourceFile.Name = "txtSourceFile"
Me.txtSourceFile.Size = New System.Drawing.Size(276, 21)
Me.txtSourceFile.TabIndex = 9
Me.txtSourceFile.Text = ""
'
'lblInput
'
Me.lblInput.Location = New System.Drawing.Point(8, 8)
Me.lblInput.Name = "lblInput"
Me.lblInput.Size = New System.Drawing.Size(80, 20)
Me.lblInput.TabIndex = 8
Me.lblInput.Text = "&Source File:"
'
'frmWaveStreamSample
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 14)
Me.ClientSize = New System.Drawing.Size(368, 258)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.prgSave,
Me.grpProperties, Me.btnSave, Me.btnOpenSource, Me.txtSourceFile,
Me.lblInput})
Me.Font = New System.Drawing.Font("Tahoma", 8.25!,
System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point,
CType(0, Byte))
Me.Name = "frmWaveStreamSample"
Me.Text = "WaveStream Sample"
Me.grpProperties.ResumeLayout(False)
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub btnOpenSource_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles btnOpenSource.Click
Dim f As OpenFileDialog = New OpenFileDialog()
f.Filter = "Wave Files (*.WAV)|*.WAV|All Files (*.*)|*.*"
f.DefaultExt = "WAV"
If (f.ShowDialog(Me) = DialogResult.OK) Then
OpenFile(f.FileName)
End If
f.Dispose()
End Sub
Private Sub OpenFile(ByVal fileName As String)
txtSourceFile.Text = ""
btnSave.Enabled = False
Dim reader As WaveStreamReader = Nothing
Dim ex As Exception
Try
reader = New WaveStreamReader(fileName)
Dim lengthSeconds As Double = ((reader.Channels *
reader.BitsPerSample) / 8)
lengthSeconds = reader.Length / (reader.SamplingFrequency *
lengthSeconds)
txtLength.Text = lengthSeconds.ToString("#0.00") + "s"
txtChannels.Text = reader.Channels.ToString()
txtBitsPerSample.Text = reader.BitsPerSample.ToString()
txtFrequency.Text = reader.SamplingFrequency.ToString()
txtSourceFile.Text = fileName
btnSave.Enabled = True
Catch ex
MessageBox.Show(Me, String.Format("Could not open file {0}: {1}",
fileName, ex), _
Text, MessageBoxButtons.OK, MessageBoxIcon.Information)
Finally
If Not (reader Is Nothing) Then
reader.Dispose()
End If
End Try
End Sub
Private Sub btnSave_Click(ByVal sender As Object, ByVal e As
System.EventArgs) Handles btnSave.Click
Dim f As SaveFileDialog = New SaveFileDialog()
f.Filter = "Wave Files (*.WAV)|*.WAV|All Files (*.*)|*.*"
f.DefaultExt = "WAV"
If (f.ShowDialog(Me) = DialogResult.OK) Then
SaveFile(f.FileName)
End If
f.Dispose()
End Sub
Private Sub SaveFile(ByVal fileName As String)
Enabled = False
Dim reader As WaveStreamReader = Nothing
Dim writer As WaveStreamWriter = Nothing
Dim ex As Exception
Try
reader = New WaveStreamReader(txtSourceFile.Text)
writer = new WaveStreamWriter(fileName, _
reader.SamplingFrequency, reader.Channels, reader.BitsPerSample)
prgSave.Maximum = reader.Length
Dim readSize As Integer = 65536
Dim buffer(readSize - 1) As Byte
Dim size As Integer = 0
Dim complete As Boolean = False
Do
size = reader.Read(buffer, 0, readSize)
If (size > 0) Then
writer.Write(buffer, 0, readSize)
If (prgSave.Value + readSize < prgSave.Maximum) Then
prgSave.Value += readSize
End If
'better to multi-thread
Application.DoEvents()
End If
Loop While (size > 0)
Catch ex
MessageBox.Show(Me, String.Format("Failed to save to file {0}: {1}",
fileName, ex), _
Text, MessageBoxButtons.OK, MessageBoxIcon.Information)
Finally
If Not (writer Is Nothing) Then
writer.Dispose()
End If
If Not (reader Is Nothing) Then
reader.Dispose()
End If
Enabled = True
End Try
End Sub
End Class
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