vb.net程序如何实现向电脑的Com口发送一段字符串信息，之后再接收显示发送的字符串信息？

'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

vb.net 获取局域网计算机的当前用户名和计算机型号等信息

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

VB.Net如何查看计算机硬件的详细属性(如:查看U盘的位置)?

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

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