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？
最新回答
碎雨带风
2024-10-03 00:12:03
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
乖我要你平安
2024-10-03 00:23:26
追问
如何检测我发送出去的信息发送成功？例如我通过 SerialPort1.Write(“123”)向串口发送了字符串“123”，可是在SerialPort1_DataReceived（）事件中仍然接收不到我发送的字符
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