“System.IO.IOException”的错误将在运行时发生。
出现的错误消息如下：
System.IO.IOException：参数不正确。
at Sysytem>IO.Ports.InternalResources.WinIOError(Int32 errorCode, String str)
at System.IO.Ports.SerialStream.BeginWriteCore(Byte[]array, Int32 offset, Int32 numbytes, AsyncCallback userCallback, Object stateObject)
at System.IO.Ports.SerialStream.Write(Byte[]array, Int32 offset, Int32 count, Int32 timeout)
at System.IO.Ports.Serialport.Write(String text)
at WindowsApplication1.Form1.Button3_Click(Object sender, EventArgs e) in C:\Documents and Settings\user\Desktop\Nikunj\data5\WindowsApplication1\Neuation.vb:Line 151
现在第151行是：SerialPort1.Write（“2）”＆amp; vbCrLf）
这是我的全部代码：
Public Class Form1
Private Sub Form1_Load( _
ByVal sender As System.Object, _
ByVal e As System.EventArgs) _
Handles MyBase.Load
For i As Integer = 0 To _
My.Computer.Ports.SerialPortNames.Count - 1
cbbCOMPorts.Items.Add( _
My.Computer.Ports.SerialPortNames(i))
Next
Button7.Enabled = False
Timer1.Enabled = False
End Sub
' Private Sub NumericUpDown1_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NumericUpDown1.ValueChanged
'End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
'While Button1.Enabled = True
If IsNumeric(Button1) = False Then
If NumericUpDown1.Value < 20000 Then
NumericUpDown1.Value = NumericUpDown1.Value + 10
TextBox1.Text = NumericUpDown1.Value
'If ProgressBar1.Value < 175 Then
'ProgressBar1.Value = ProgressBar1.Value + 4
'End If
End If
End If
Button1.Enabled = False
Button1.Enabled = True
'End While
End Sub
Private Sub TextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TextBox1.TextChanged
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
If IsNumeric(Button2) = False Then
If NumericUpDown1.Value > 10 Then
NumericUpDown1.Value = NumericUpDown1.Value - 10
'TextBox1.Text = "RCF"
'If ProgressBar1.Value < 175 Then
'ProgressBar1.Value = ProgressBar1.Value - 4
'End If
End If
End If
End Sub
' Private Sub Button5_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button5.Click
' Try
'SerialPort1.Write("2&" & RichTextBox2.Text & vbCrLf)
' If NumericUpDown1.Value < 100 Then
' SerialPort1.Write("2&000" & NumericUpDown1.Value & vbCrLf)
' End If
' If NumericUpDown1.Value < 1000 Then
' SerialPort1.Write("2&00" & NumericUpDown1.Value & vbCrLf)
' End If
' If NumericUpDown1.Value < 10000 Then
' SerialPort1.Write("2&0" & NumericUpDown1.Value & vbCrLf)
' End If
' If NumericUpDown1.Value > 9999 Then
' SerialPort1.Write("2&" & NumericUpDown1.Value & vbCrLf)
' End If
' SerialPort1.Write("2&" & NumericUpDown1.Value & vbCrLf)
' With RichTextBox1
' .SelectionColor = Color.Black
'.AppendText(RichTextBox2.Text & vbCrLf)
' .ScrollToCaret()
' End With
' RichTextBox2.Text = String.Empty
' Catch ex As Exception
' MsgBox(ex.ToString)
' End Try
' End Sub
Private Sub RichTextBox1_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs)
End Sub
Private Sub RichTextBox2_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles RichTextBox2.TextChanged
End Sub
Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
If SerialPort1.IsOpen Then
End If
Try
With SerialPort1
.PortName = cbbCOMPorts.Text
.BaudRate = 19200
.Parity = IO.Ports.Parity.None
.DataBits = 8
.StopBits = IO.Ports.StopBits.One
'.Encoding = System.Text.Encoding.Unicode
End With
SerialPort1.Open()
RichTextBox2.Text = cbbCOMPorts.Text & " connected."
Button4.Enabled = False
Button7.Enabled = True
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End Sub
Private Sub DataReceived( _
ByVal sender As Object, _
ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) _
Handles SerialPort1.DataReceived
' RichTextBox1.Invoke(New _
' myDelegate(AddressOf updateTextBox), _
' New Object() {})
End Sub
Public Delegate Sub myDelegate()
Public Sub updateTextBox()
'With RichTextBox1
'.Font = New Font("Garamond", 12.0!, FontStyle.Bold)
'.SelectionColor = Color.Red
' .AppendText(SerialPort1.ReadExisting)
'.ScrollToCaret()
'End With
End Sub
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Try
If NumericUpDown1.Value < 100 Then
SerialPort1.Write("2&000" & NumericUpDown1.Value & vbCrLf)
End If
If NumericUpDown1.Value < 1000 Then
SerialPort1.Write("2&00" & NumericUpDown1.Value & vbCrLf)
End If
If NumericUpDown1.Value < 10000 Then
SerialPort1.Write("2&0" & NumericUpDown1.Value & vbCrLf)
End If
If NumericUpDown1.Value > 9999 Then
SerialPort1.Write("2&" & NumericUpDown1.Value & vbCrLf)
End If
' SerialPort1.Write("2&" & NumericUpDown1.Value & vbCrLf)
SerialPort1.Write("2)" & vbCrLf)
'With RichTextBox1
' .SelectionColor = Color.Black
'.AppendText(RichTextBox2.Text & vbCrLf)
' .ScrollToCaret()
'End With
RichTextBox2.Text = cbbCOMPorts.Text & " connected."
Catch ex As Exception
MsgBox(ex.ToString)
End Try
' SerialPort1.Write("2)" & vbCrLf)
Timer1.Enabled = True
Button3.Enabled = False
Button6.Enabled = True
End Sub
Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button6.Click
SerialPort1.Write("2*" & vbCrLf)
Button3.Enabled = True
Button6.Enabled = False
Timer1.Enabled = False
End Sub
Private Sub Button7_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button7.Click
Try
SerialPort1.Close()
RichTextBox2.Text = SerialPort1.PortName & " disconnected."
Button4.Enabled = True
Button7.Enabled = False
Timer1.Enabled = False
Button3.Enabled = True
Button6.Enabled = False
Catch ex As Exception
MsgBox(ex.ToString)
End Try
End Sub
Private Sub cbbCOMPorts_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cbbCOMPorts.SelectedIndexChanged
End Sub
Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick
If NumericUpDown3.Value > 0 Then
NumericUpDown3.Value = NumericUpDown3.Value - 1
If NumericUpDown3.Value = 0 Then
' If NumericUpDown2.Value > 0 Then
'NumericUpDown2.Value = NumericUpDown2.Value - 1
'If NumericUpDown2.Value >= 0 And NumericUpDown3.Value = 0 Then
' NumericUpDown3.Value = 59
'End If
'End If
End If
Else 'NumericUpDown3.Value = 59
If NumericUpDown2.Value > 0 Then
NumericUpDown2.Value = NumericUpDown2.Value - 1
If NumericUpDown2.Value >= 0 And NumericUpDown3.Value = 0 Then
NumericUpDown3.Value = 59
End If
End If
End If
If NumericUpDown3.Value = 0 And NumericUpDown2.Value = 0 Then
Timer1.Enabled = False
SerialPort1.Write("2*" & vbCrLf)
Timer1.Enabled = False
Button3.Enabled = True
Button6.Enabled = False
End If
End Sub
Private Sub NumericUpDown2_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NumericUpDown2.ValueChanged
End Sub
Private Sub NumericUpDown3_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NumericUpDown3.ValueChanged
End Sub
Private Sub Label1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
End Sub
Private Sub Display_LinkClicked(ByVal sender As System.Object, ByVal e As System.Windows.Forms.LinkLabelLinkClickedEventArgs) Handles Display.LinkClicked
End Sub
Private Sub ContextMenuStrip1_Opening(ByVal sender As System.Object, ByVal e As System.ComponentModel.CancelEventArgs)
End Sub
Private Sub NumericUpDown1_ValueChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles NumericUpDown1.ValueChanged
End Sub
结束班
另一件事，只有当我尝试在Windows XP中运行该应用程序时才会出现此错误。它在Windows 7中没有任何错误。
请帮我解决异常错误。我的错误与串口1相关。它无法传输数据。
应用程序是运行电机。它很容易连接到COM端口但是当我点击START按钮时，应用程序停止并显示上面的错误消息。
请帮我解决此问题。提前谢谢。