串口vb.net文本

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

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)

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click '发送指令

vb.net怎么实现串口传输文件

Imports System

Imports System.IO.Ports

Public Class Form1

Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

'获取计算机有效串口

Dim ports As String() = SerialPort.GetPortNames() '必须用命名空间,用SerialPort,获取计算机的有效串口

Dim port As String

For Each port In ports

portnamebox.Items.Add(port) '向combobox中添加项

Next port

'初始化界面

VB.net 读取文本文件?

①.、实现上传按钮方法代码.

如何用vb.net向串口发送十六位进制数据

Dim TestArray() As String = Split(TextBox1.Text)

Dim hexBytes() As Byte

ReDim hexBytes(TestArray.Length - 1)

Dim i As Integer

For i = 0 To TestArray.Length - 1

hexBytes(i) = Val("h" TestArray(i))

Next

SerialPort.Write(hexBytes, 0, hexBytes.Length)

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