Microcontroller to ASP.net Web Form through Serial Port

Imports System
Imports System.Data
Imports System.Configuration
Imports System.Collections
Imports System.Web
Imports System.Web.Security
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Web.UI.WebControls.WebParts
Imports System.Web.UI.HtmlControls
Imports System.IO.Ports

Partial Class Main
    Inherits System.Web.UI.Page

    Protected Sub form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles form1.Load

        Dim Serialport7 As New IO.Ports.SerialPort

        With Serialport7
            .PortName = "COM7"
            .BaudRate = 9600
            .Parity = Parity.None
            .DataBits = 8
            .StopBits = StopBits.One
        End With

        Try
            Serialport7.Open()
        Catch ex As Exception
            MsgBox(ex.ToString)
        End Try


        Dim ReceivedData As String

        ReceivedData = Serialport7.ReadLine()

        If ReceivedData.Substring(0, 1) = "T" Then

            TextBox1.Text = ReceivedData.Remove(0, 1)

        ElseIf ReceivedData.Substring(0, 1) = "H" Then

            TextBox2.Text = ReceivedData.Remove(0, 1)

        End If

        TextBox3.Text = System.DateTime.Now

        Serialport7.Close()

    End Sub

End Class