Opening an Excel document from SharePoint using PowerShell

问题

I'm trying to open an Excel workbook from SharePoint using PowerShell. I'm not loading the SharePoint snap-in—I do not have it.

When PowerShell tries to launch the workbook, SharePoint prompts for credentials. The problem is that we're trying to schedule the script, and we would like the script to have an SSO-like experience.

Here's the MWE:

$Excel = New-Object -ComObject Excel.Application
$Workbook = $Excel.Workbooks.Open(http://site/file.xlsx)
$Worksheet = $Workbook.Sheets.Item($WorksheetName)
$Excel.Visible = $false

# some Excel manipulation

$Workbook.Close($false)
$Excel.Quit()
[System.Runtime.Interopservices.Marshal]::ReleaseComObject($Excel) | Out-Null
Remove-Variable Excel

回答1:

First, download the SharePoint file locally, then open, manipulate, etc.

The example below uses the default creds of the user running the script/PowerShell session.

$fromfile = "http://site/file.xlsx"
$tofile   = "c:\somedirectory\file.xlsx"

$webclient = New-Object System.Net.WebClient
$webclient.UseDefaultCredentials = $true
$webclient.DownloadFile($fromfile, $tofile)

$Excel = New-Object -ComObject Excel.Application
$Workbook = $Excel.Workbooks.Open($tofile)
$Worksheet = $Workbook.Sheets.Item($WorksheetName)
$Excel.Visible = $false

# some Excel manipulation

$Workbook.Close($false)
$Excel.Quit()
[System.Runtime.Interopservices.Marshal]::ReleaseComObject($Excel) | Out-Null
Remove-Variable Excel

回答2:

I have recently run into the same issue. I solved it without saving it to the local machine.

The COM Excel object's WorkBook property has a method so called CheckIn and CheckOut. You will need to use both.

Also, to directly open a file from Sharepoint, just go for the library on the Sharepoint page, open it in explorer. You will get something like this:

http://sitename/sites/TeamSite/FileLibrary/

You only need to replace the path for an UNC path like this:

\\sitename\sites\TeamSite\FileLibrary\

(With Double backslash at the begininning)

$ExcelObject = New-Object -ComObject Excel.Application

$ExcelWorkBook = $ExcelObject.Workbooks.Open("\\sitename\sites\TeamSite\FileLibrary\test.xlsx")
$ExcelObject.Workbooks.CheckOut("\\sitename\sites\TeamSite\FileLibrary\test.xlsx")

$ExcelWorkSheet = $ExcelWorkBook.Sheets.Item(1)

#This part selects the A:1 cell and changes it's value.
$ExcelWorkSheet.Cells.Item(1,1) = "Edited text"

$ExcelWorkBook.Save()
$ExcelWorkBook.CheckIn()

来源：https://stackoverflow.com/questions/42676858/opening-an-excel-document-from-sharepoint-using-powershell