How to Read a text file and replace multiple keywords...

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I am trying to read a text file that contain some distinctive keywords, so far I am able to read and replace the keywords on 1 line, but I don't know how to read and replace all the keywords in the text file..?

My text file looks like this, where $name, $lastname & $dob are the keywords to be replaced:

=================================
The persons name is: $name
The lastname is: $lastname
Date of Birth: $dob
=================================

My code so far is:

VB

Dim strFile As String = "c:\test.txt"
Dim strRead As StreamReader = File.OpenText(strFile)
Dim strX As String

        Do Until strRead.Peek = -1

            strX = strRead.ReadToEnd.Replace("$name", dt.Rows(0)("name"))
           ' strX = strRead.ReadToEnd.Replace("$lastname", dt.Rows(0)("lastname"))

            tbConfig.Text = strX

        Loop

Posted 24-Apr-15 4:25am

grandanet

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grandanet 24-Apr-15 12:18pm

Awesome, Yes! Thank you guys, both solutions work but the one provided by duDE makes it easier to the eyes.

2 solutions

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OriginalGriff · Accepted Answer · 2015-04-24T04:38:00

Solution 1

To do multiple changes, you would need to do something like this:

VB

strX = strRead.ReadToEnd.Replace("$name", dt.Rows(0)("name"))
strX = strX.Replace("$lastname", dt.Rows(0)("lastname"))
strX = strX.Replace("$dob", dt.Rows(0)("dob"))

Posted 24-Apr-15 4:38am

OriginalGriff

Leo Chapiro · Accepted Answer · 2015-04-24T04:41:00

Instead of

VB

'strX = strRead.ReadToEnd.Replace("$name", dt.Rows(0)("name"))

use something like:

VB

strX = strRead.ReadToEnd()
strX = strx.Replace("$name", dt.Rows(0)("name"))
strX = strx.Replace("$lastname", dt.Rows(0)("lastname"))
strX = strx.Replace("$dob", dt.Rows(0)("dob"))

Another one possibility (if text is very long for example) is to read it line-by-line like this:

VB

Dim line As String = Nothing

Do Until strRead.Peek = -1
        line = reader.ReadLine()
        ' and so long