Subscript out of Range Error when searched for string and its line number in Text File

gmayor · #1 01-11-2021, 11:07 PM

Your code is only programmed to find the first instance and then read the following line, hence your observation.
If you want to read all the values and then read the values on the lines that reflect the 'WhatToFind' text then you need a different and simpler approach e.g.

Code:

Option Explicit
'Graham Mayor - https://www.gmayor.com - Last updated - 12 Jan 2021
Private Sub UserForm_Initialize()
Dim WhatToFind As String, FromFile As String

    WhatToFind = "DOB"
    FromFile = "C:\Working with Textfiles\Original2-Name-Age.txt"
    MsgBox FileSearch(WhatToFind, FromFile)
    '''''MSGBOX DISPLAYS DATES OF BIRTH
End Sub

Private Function FileSearch(ByVal WhatToFind As String, ByVal FromFile As String) As String
Dim FileNum As Integer
Dim DataLine As String
Dim strFound As String
Dim vLine As Variant
Dim strList As String

    FileNum = FreeFile()
    Open FromFile For Input As #FileNum
    Do While Not EOF(FileNum)
        Line Input #FileNum, DataLine    ' read in data 1 line at a time'
        If InStr(1, DataLine, WhatToFind) > 0 Then    'the string is found'
            If InStr(1, DataLine, Chr(34)) > 0 Then
                strFound = DataLine
                vLine = Split(strFound, Chr(34))    'split the line at the " symbol'
                strList = strList & vbCr & vLine(1)     'read and output the second value'
            End If
        End If
    Loop
    If strList = "" Then
        FileSearch = "Not Found"
    Else
        FileSearch = strList
    End If
    Close #FileNum    'close the file
lbl_Exit:
    Exit Function
End Function

Given the reference to a userform then surely this code is intended to do something more useful than pop up a message box e.g. list the items in a list box? In that case set the FileSearch to output the items directly to a list box (here ListBox1) e.g.

Code:

Option Explicit
'Graham Mayor - https://www.gmayor.com - Last updated - 12 Jan 2021 
Const FromFile As String = "C:\Working with Textfiles\Original2-Name-Age.txt"
Const WhatToFind As String = "DOB"

Private Sub UserForm_Initialize()
    ListBox1.Clear
    FileSearch WhatToFind, FromFile
End Sub

Private Function FileSearch(ByVal WhatToFind As String, ByVal FromFile As String)
Dim FileNum As Integer
Dim DataLine As String
Dim strFound As String
Dim bFound As Boolean
Dim vLine As Variant

    FileNum = FreeFile()
    Open FromFile For Input As #FileNum
    Do While Not EOF(FileNum)
        Line Input #FileNum, DataLine    ' read in data 1 line at a time'
        If InStr(1, DataLine, WhatToFind) > 0 Then    'the string is found'
            If InStr(1, DataLine, Chr(34)) > 0 Then
                strFound = DataLine
                vLine = Split(strFound, Chr(34))    'split the line at the " symbol'
                ListBox1.AddItem vLine(1)     'read and output the second value to the listbox'
            End If
        End If
    Loop
    Close #FileNum    'close the file
lbl_Exit:
    Exit Function
End Function

SamDsouza · #2 01-12-2021, 07:08 PM

GMayor Sir,

Indeed valuable inputs. Thank you so much for the help you have provided and derive the results in two different objects.

Last question How can i define a blank line as string. Although vbCr , vbCrlf are predefined. One can see the 1st and 2nd Structure of text file in #3

Thank you so much

SamD

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Declare wBk as workbook. Set wBk = workbooks("NewBook.xls") gives error: Subscript out of range.	Syed Shabbir	Excel Programming	1	09-27-2020 09:35 AM
replace with text contains a group number which is out of range Error Message	raghugada	Word	6	05-30-2017 02:09 PM
Runtime error '9': Subscript out of Range	KingoftheKassel	Excel Programming	1	06-13-2016 08:00 PM
VBA Conditional Formatting Error (Subscript out of Range))	tinfanide	Excel Programming	1	05-15-2015 08:12 AM
Subscript out of range error	KHTAY	Excel	6	03-28-2009 11:18 PM