Merged ValidateSet for Encoding and Extension

ImportExcel.psm1

@@ -2,6 +2,7 @@ Add-Type -Path "$($PSScriptRoot)\EPPlus.dll"
 
 . $PSScriptRoot\Export-Excel.ps1
 . $PSScriptRoot\New-ConditionalFormattingIconSet.ps1
+. $PSScriptRoot\Export-ExcelSheet.ps1
 
 function Import-Excel {
     param(
@@ -52,53 +53,6 @@ function Import-Excel {
     }
 }
 
-function Export-ExcelSheet {
-
-    [CmdletBinding()]
-    param
-    (
-        [Parameter(Mandatory = $true)]
-        [String]
-        $Path,
-        [String]
-        $OutputPath = '.\',
-        [String]
-        $SheetName,
-        [ValidateSet('ASCII', 'BigEndianUniCode','Default','OEM','UniCode','UTF32','UTF7','UTF8')]
-        [string]
-        $Encoding = 'UTF8',
-        [ValidateSet('.txt', '.log','.csv')]
-        [string]
-        $Extension = '.csv',
-        [ValidateSet(';', ',')]
-        [string]
-        $Delimiter = ';'
-    )
-
-    $Path = (Resolve-Path $Path).Path
-    $xl = New-Object -TypeName OfficeOpenXml.ExcelPackage -ArgumentList $Path
-    $workbook = $xl.Workbook
-
-    $targetSheets = $workbook.Worksheets | Where {$_.Name -Match $SheetName}
-
-    $params = @{} + $PSBoundParameters
-    $params.Remove("OutputPath")
-    $params.Remove("SheetName")
-    $params.Remove('Extension')
-    $params.NoTypeInformation = $true
-
-    Foreach ($sheet in $targetSheets)
-    {
-        Write-Verbose "Exporting sheet: $($sheet.Name)"
-
-        $params.Path = "$OutputPath\$($Sheet.Name)$Extension"
-
-        Import-Excel $Path -Sheet $($sheet.Name) | Export-Csv @params
-    }
-
-    $xl.Dispose()
-}
-
 function Add-WorkSheet {
     param(
         #TODO Use parametersets to allow a workbook to be passed instead of a package