Merge pull request #35 from francoislg/master

Allow reading a file already open in Excel

ImportExcel.psm1

@@ -2,18 +2,20 @@ Add-Type -Path "$($PSScriptRoot)\EPPlus.dll"
 
 function Import-Excel {
     param(
-        [Parameter(ValueFromPipelineByPropertyName=$true)]
-        $FullName,
+		[Alias("FullName")]
+        [Parameter(ValueFromPipelineByPropertyName=$true, ValueFromPipeline=$true, Mandatory)]
+        $Path,
         $Sheet=1,
         [string[]]$Header
     )
 
     Process {
 
-        $FullName = (Resolve-Path $FullName).Path
-        write-debug "target excel file $FullName"
-
-        $xl = New-Object OfficeOpenXml.ExcelPackage $FullName
+        $Path = (Resolve-Path $Path).Path
+        write-debug "target excel file $Path"
+		
+		$stream = New-Object -TypeName System.IO.FileStream -ArgumentList $Path,"Open","Read","ReadWrite"
+        $xl = New-Object -TypeName OfficeOpenXml.ExcelPackage -ArgumentList $stream
 
         $workbook  = $xl.Workbook
 
@@ -39,7 +41,9 @@ function Import-Excel {
             }
             [PSCustomObject]$h
         }
-
+		
+		$stream.Close()
+		$stream.Dispose()
         $xl.Dispose()
         $xl = $null
     }
@@ -324,6 +328,7 @@ function ConvertFrom-ExcelSheet {
     [CmdletBinding()]
     param
     (
+		[Alias("FullName")]
         [Parameter(Mandatory = $true)]
         [String]
         $Path,
@@ -340,7 +345,8 @@ function ConvertFrom-ExcelSheet {
     )
 
     $Path = (Resolve-Path $Path).Path
-    $xl = New-Object -TypeName OfficeOpenXml.ExcelPackage -ArgumentList $Path
+	$stream = New-Object -TypeName System.IO.FileStream -ArgumentList $Path,"Open","Read","ReadWrite"
+    $xl = New-Object -TypeName OfficeOpenXml.ExcelPackage -ArgumentList $stream
     $workbook = $xl.Workbook
 
     $targetSheets = $workbook.Worksheets | Where {$_.Name -like $SheetName}
@@ -358,7 +364,9 @@ function ConvertFrom-ExcelSheet {
 
         Import-Excel $Path -Sheet $($sheet.Name) | Export-Csv @params -Encoding $Encoding
     }
-
+	
+	$stream.Close()
+	$stream.Dispose()
     $xl.Dispose()
 }
 

TestImportExcel.ps1

@@ -0,0 +1,3 @@
+Import-Module "$PSScriptRoot/ImportExcel" -Force
+
+Import-Excel "$PSScriptRoot/test.xlsx" -ErrorAction Stop