<#
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	program or service. The sample scripts are provided AS IS without warranty
	of any kind. Microsoft further disclaims all implied warranties including,
	without limitation, any implied warranties of merchantability or of fitness for
	a particular purpose. The entire risk arising out of the use or performance of
	the sample scripts and documentation remains with you. In no event shall
	Microsoft, its authors, or anyone Else involved in the creation, production, or
	delivery of the scripts be liable for any damages whatsoever (including,
	without limitation, damages for loss of business profits, business interruption,
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#>

$ErrorActionPreference = 'Stop'

Function Convert-CsvInBatch
{
	[CmdletBinding()]
	Param
	(
		[Parameter(Mandatory=$true)][String]$Folder
	)
	$ExcelFiles = Get-ChildItem -Path $Folder -Filter *.xlsx -Recurse

	$excelApp = New-Object -ComObject Excel.Application
	$excelApp.DisplayAlerts = $false

	$ExcelFiles | ForEach-Object {
		$workbook = $excelApp.Workbooks.Open($_.FullName)
		$csvFilePath = $_.FullName -replace "\.xlsx$", ".csv"
		$workbook.SaveAs($csvFilePath, [Microsoft.Office.Interop.Excel.XlFileFormat]::xlCSV)
		$workbook.Close()
	}

	# Release Excel Com Object resource
	$excelApp.Workbooks.Close()
	$excelApp.Visible = $true
	Start-Sleep 5
	$excelApp.Quit()
	[System.Runtime.Interopservices.Marshal]::ReleaseComObject($excelApp) | Out-Null
}

#
# 0. Prepare the folder path which contains all excel files
# $FolderPath = "D:\var\projects\OCOS\var\excelchange"

$FolderPath = "C:\Users\hy092524\Documents\email idd\tatareport"

Convert-CsvInBatch -Folder $FolderPath