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Visual Basic .net manipluating a csv file

Posted on 2010-11-27
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Last Modified: 2013-11-26
Hi
I need to manipulate a CSV file using visual basic .net, what options do I have and could you provide a sample of the code for connecting to the file or reading into an array?
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Question by:sykotex
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Expert Comment

by:alexey_gusev
ID: 34224971
in my view you have at least 2 options:

- read the file line by line and then use String.Split(delim) to get all fields in an array

- add a reference to Excel, create the app object etc and try to read the csv into the worksheet:
http://www.vbdotnetheaven.com/UploadFile/ggaganesh/ExcelSpreadsheet04182005093012AM/ExcelSpreadsheet.aspx
http://www.thescarms.com/dotnet/ExcelObject.aspx
http://www.gemboxsoftware.com/GBSpreadsheet.htm (commercial component)

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Expert Comment

by:James Murrell
ID: 34224985
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Accepted Solution

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hongjun earned 500 total points
ID: 34225028
Preparation
1. Create a file named "schema.ini" in the same directory of your executable and have the contents as follows (note we can specify the delimiter and in this case, I set it as %)

 
[NameList.csv]
Format=Delimited(%)

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2. Create the csv file (NameList.csv)

The first row is the column name.

 
UserID%"Username"
1%"user1"
2%"user2"

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Select code

 
Sub ReadCsv()
        Dim con As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Environment.CurrentDirectory & ";" + "Extended Properties='text;FMT=Delimited(;);HDR=YES'")
        Dim da As New OleDbDataAdapter("select * from [NameList.csv]", con)
        Dim dt As New DataTable
        da.Fill(dt)

        If dt IsNot Nothing AndAlso dt.Rows.Count > 0 Then
            For Each row As DataRow In dt.Rows
                'Read all
                Console.WriteLine(row("UserID").ToString() & ", " & row("Username").ToString())
            Next
        End If
    End Sub

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