We help IT Professionals succeed at work.

Merge two CSV Files Powershell

1,276 Views
Last Modified: 2012-05-10
Hi All,

I have the below script but am having some issues, i have two csv files

prods.csv:
partcode, manuf, desc, cost, rrp

stock.csv:
partcode, qty

i need to merge the qty column with the corolating partcode, the file stock.csv has more items in it than the prods.csv and neither files have a header in them so i need to match the partcodes and then on a match put the qty in the prods.csv or a new csv.

my current script only checks to make sure that the line number is the same which isnt good enough as the stock.csv has more lines in it.


Remove-Item E:\MergedData.txt

$prods = Get-Content "E:\prods.csv"

Write-Host "Ateam Product file read"

$data = Get-Content "E:\Stock.csv"

Write-Host "Both files read"

Clear-Host

[int] $i = 0
foreach($prod in $prods)
{
# split the current line from the genes.txt
# file into an array of 2 items using
# the tab character as the delimiter
$oneLineProds = $prod.Split(",")

# assign each of the 2 pieces of gene info
# to a variable

# $geneNumber would be "gene1" in first line
$prodNumber = $oneLineProds[0]

# $geneName would be "kinse_a" in first line
$prodName = $oneLineProds[1]
$prodDesc = $oneLineProds[2]
$prodCost = $oneLineProds[3]
$prodRRP = $oneLineProds[4]

# $data[$i] retrieves the correct line number from
# the data.txt file.
# split the current line from the data.txt
# file into an array of 2 elements using
# the tab character as the delimiter
$oneLineData = $data[$i].Split(",")

# $geneDataValue would be "+8.6" in first line
$prodStock = $oneLineData[1]

# build a variable that will look like this for the
# first line in both files:
# "gene1,kinse_a,+8.6"
$lineToWrite = "$prodNumber, $prodName, $prodDesc, $prodCost, $prodRRP, $prodStock"

# now write that variable out to a file
$lineToWrite | out-file E:\MergedData.txt -append

# increment $i so that we always retrieve the
# correct line number from the data.txt file
$i++

# for performance testing - comment out for production
if( ($i % 100) -eq 0 )
{
$i
}
}

Open in new window

Comment
Watch Question

Engineer
CERTIFIED EXPERT
Commented:
Unlock this solution and get a sample of our free trial.
(No credit card required)
UNLOCK SOLUTION

Author

Commented:
The script works fine, but when one of the products cant find a stock line for it the column isn't created as you will know this is not good for CSV as it cant tell where the column ends / finishes I am getting the following result:

partcode,manuf,desc,cost,rrp
partcode,manuf,desc,cost,rrp,qty
partcode,manuf,desc,cost,rrp,qty
partcode,manuf,desc,cost,rrp
partcode,manuf,desc,cost,rrp,qty
partcode,manuf,desc,cost,rrp


i need it to do this:

partcode,manuf,desc,cost,rrp,
partcode,manuf,desc,cost,rrp,qty
partcode,manuf,desc,cost,rrp,qty
partcode,manuf,desc,cost,rrp,
partcode,manuf,desc,cost,rrp,qty
partcode,manuf,desc,cost,rrp,


simply add a comma to the columns that dont have a qty of stock in order to make it look like the

Author

Commented:
Hi Sorry to be a pain i have got the script to work now but if the script is run more than once on a file then it will add the header again and again when the script is run, is it possible to add an if statement that will not add the header if it already exists.
Remove-Item "e:\csv\csv_suppliers\ateam\MergedData.csv"
$prodheader = "partcode,manuf,desc,cost,std"
$stockheader = "partcode,qty"
$combinedheader = "$($prodheader),qty"

$arrProd = @()
$arrProd += $prodheader
gc "e:\csv\csv_suppliers\ateam\Pricelist for Fms.csv" | % { $arrProd+=$_ }

Set-Content "e:\csv\csv_suppliers\ateam\Pricelist for Fms.csv" $arrProd
$arrProd = $null

$arrStock = @()
$arrStock += $stockheader
gc "e:\csv\csv_suppliers\ateam\stock feed.csv" | % { $arrStock+=$_}
Set-Content "e:\csv\csv_suppliers\ateam\stock feed.csv" $arrStock
$arrStock = $null

$arrProd = Import-Csv "e:\csv\csv_suppliers\ateam\Pricelist for fms.csv"
$arrStock = Import-Csv "e:\csv\csv_suppliers\ateam\stock feed.csv"

$hashProd = @{}
$arrProd | % {
	$hashProd.Add($_.partcode,$("$($_.manuf),$($_.desc),$($_.cost),$($_.std),"))
}

$hashStock = @{}
$arrStock | % {
	$hashStock.Add($_.partcode,$("$($_.qty)"))
}

$hashStock.Keys | % {
	if ($hashProd.ContainsKey($_)){
		$hashProd.Item($_) +=""+$hashStock.Item($_)
	}
}

New-Item -ItemType File -Path "e:\csv\csv_suppliers\ateam\MergedData.csv"
Add-content "e:\csv\csv_suppliers\ateam\MergedData.csv" $combinedheader
Add-Content "e:\csv\csv_suppliers\ateam\MergedData.csv" @($hashProd.Keys | % { "$($_),$($hashprod.item($_))" })

Open in new window

Unlock the solution to this question.
Thanks for using Experts Exchange.

Please provide your email to receive a sample view!

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

OR

Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.