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商城网站建设因基本功能的需求不同费用上面也有很大的差别...
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'vb.net的串口接收数据要用到委托
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Delegate Sub SetTextCallback(ByVal InputString As String) '声明一个委派类,并声明符合函数参数有一个,而其型态是字符串
Private Sub ShowString(ByVal comData As String)
txt_Re.Text = comData '将收到的数据入接收文字框中--- txt_Re.Text 是接收用的文本框
txt_Re.SelectionStart = txt_Re.Text.Length
txt_Re.ScrollToCaret()
End Sub
Private Sub SerialPort1_DataReceived(ByVal sender As Object, ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) Handles SerialPort1.DataReceived‘自动接收事件
Dim inData As String = SerialPort1.ReadExisting
Dim d As New SetTextCallback(AddressOf ShowString)
Invoke(d, inData)
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click '发送指令
SerialPort1.Write("123")
End Sub
Private Declare Function GetComputerName Lib "kernel32" Alias "GetComputerNameA" (ByVal lpBuffer As String, nSize As Long) As Long
Private Declare Function GetUserName Lib "advapi32.dll" Alias "GetUserNameA" (ByVal lpBuffer As String, nSize As Long) As Long
Private Sub GetName()
Dim sJM As String
Dim sMC As String
Dim sIP As String
Dim s As String
s = String(128, Chr(0))
GetComputerName s, Len(s)
s = UCase(Left(s, InStr(1, s, Chr(0)) - 1))
sJM = s'计算机名称
s = String(128, Chr(0))
GetUserName s, Len(s)
s = UCase(Left(s, InStr(1, s, Chr(0)) - 1))
sMC = s‘当前用户名称
End Sub
'用这种方法在远程获得再发回本机就可以吧
'取计算机型号暂时不会
先引用system.io
之后声明类型为 DriveInfo 的变量
声明的对象中包含 一些方法