ASP.NET --> สอบถามปัญหาการเช็คค่าที่ได้จาก StreamReader ทีละบรรทัด

Imports System
Imports System.IO

Partial Class checkbookingday
    Inherits System.Web.UI.Page

    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load


        Dim StrWer As StreamReader
        Try
            StrWer = File.OpenText(Server.MapPath("File/") & "bookingday.txt") '("D:\user profile\user\Desktop\AirBusBooking\File\bookingday.txt")
            Do Until StrWer.EndOfStream
                Check(StrWer.ReadLine()) 
            Loop
            StrWer.Close()
        Catch ex As Exception
            Me.Label1.Text = "Read failed. (" & ex.Message & ")"
        End Try

    End Sub

Protected Function Check(ByVal Text As String) As Boolean
'do something
End Sub
End Class