[VB.Net] How to Read Text from a TextBox

Q

qiangqiang101

Newcomer
Joined
Nov 2, 2012
I have a module

PHP: 
Option Strict Off 
Option Explicit On 
Module TXTread 

    Public Function ReadTXTValue(ByRef KEY As String, ByRef Variable As String) As String 
        Dim NF As Short 
        Dim Temp As String 
        Dim LcaseTemp As String 
        Dim ReadyToRead As Boolean 

AssignVariables: 
        NF = FreeFile() 
        ReadTXTValue = "" 
        KEY = "[" & LCase(KEY) & "]" 
        Variable = LCase(Variable) 

EnsureFileExists: 
        FileOpen(NF, frmStart.txtMessage2.Text, OpenMode.Binary) 
        FileClose(NF) 
        SetAttr(frmStart.txtMessage2.Text, FileAttribute.Archive) 

LoadFile: 
        FileOpen(NF, frmStart.txtMessage2.Text, OpenMode.Input) 
        While Not EOF(NF) 
            Temp = LineInput(NF) 
            LcaseTemp = LCase(Temp) 
            If InStr(LcaseTemp, "[") <> 0 Then ReadyToRead = False 
            If LcaseTemp = KEY Then ReadyToRead = True 
            If InStr(LcaseTemp, "[") = 0 And ReadyToRead = True Then 
                If InStr(LcaseTemp, Variable & "=") = 1 Then 
                    ReadTXTValue = Mid(Temp, 1 + Len(Variable & "=")) 
                    FileClose(NF) : Exit Function 
                End If 
            End If 
        End While 
        FileClose(NF) 
    End Function 
End Module

And I put this on my form1
Me.txtCheck4Update.Text = ReadTXTValue("SERVER SET", "HttpAddressFile")

And My Setting in the txtMessage2.text is
[SERVER SET]
HttpAddressFile=http://www.something.com/server.txt

But when I debug my Application
A Warning Shows up
"ArgumentException was unhandled"
 
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