[RESOLVED] How to retrieve value from RFID card.

[nUflAvOrS]

Hi all,

I'm using RFID Reader to read the data from RFID Card.

The code using as below

Dim WithEvents serialPort As New IO.Ports.SerialPort
    Public Event onComm(ByVal sender As Object, ByVal e As System.EventArgs)
    Private psInput As String
 
 
 Private Sub DataReceived( _
   ByVal sender As Object, _
   ByVal e As System.IO.Ports.SerialDataReceivedEventArgs) _
   Handles serialPort.DataReceived
        Dim strv As String
        strv = serialPort.ReadExisting
        If strv <> "" Then
            psInput = strv
            Session("InputRFID") = psInput
           
        End If
    End Sub
 
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
 
        If Me.IsPostBack = False Then
            With serialPort
                .PortName = "COM" & "4"
                .BaudRate = 9600
                .Parity = IO.Ports.Parity.None
                .DataBits = 8
                .StopBits = IO.Ports.StopBits.One
                .ReceivedBytesThreshold = 11
                Try
                    If .IsOpen = False Then .Open()
                Catch ex As Exception
 
                End Try
 
 
            End With
        End If
 
    End Sub

Now My Problem is when the card was scanned, It will firing DataReceived event. I successfully get the data and try to display data on a textbox.

The page do not postback after DataReceived event so the textbox cannot display.

How do I accomplish it ?

Thanks in advance