如何使用 PowerShell 从 SharePoint 下载文件？

Question

我使用以下网站来帮助我实现这一目标并进行故障排除。

1. Download file from SharePoint
2. How to download newest file from SharePoint using PowerShell
3. Mike Smith's Tech Training Notes SharePoint, PowerShell and .Net!
4. Upload file to a SharePoint doc library via PowerShell
5. Download latest file from SharePoint Document Library
6. How to iterate each folders in each of the SharePoint websites using PowerShell
7. PowerShell's Get-ChildItem on SharePoint Library

我正在尝试从 SharePoint 文件夹下载随机文件，并且当我真正知道文件名和扩展名时，它就可以正常工作。

带有名称和扩展名的工作代码：

$SharePoint = "https://Share.MyCompany.com/MyCustomer/WorkLoad.docx"
$Path = "$ScriptPath\$($CustomerName)_WorkLoad.docx"

#Get User Information
$user = Read-Host "Enter your username"
$username = "$user@MyCompany"
$password = Read-Host "Enter your password" -AsSecureString

#Download Files
$WebClient = New-Object System.Net.WebClient
$WebClient.Credentials = New-Object System.Net.Networkcredential($UserName, $Password)
$WebClient.DownloadFile($SharePoint, $Path)

但是，我似乎无法弄清楚如何处理多个未知名称或扩展名的文件。

我已尝试映射驱动器，但结果是“驱动器映射失败”和“找不到网络路径”。错误：

$SharePoint  = Read-Host 'Enter the full path to Delivery Site'
$LocalDrive  = 'P:'
$Credentials = Get-Credential


if (!(Test-Path $LocalDrive -PathType Container)) {
    $retrycount = 0; $completed = $false
    while (-not $completed) {
        Try {
            if (!(Test-Path $LocalDrive -PathType Container)) {
                (New-Object -ComObject WScript.Network).MapNetworkDrive($LocalDrive,$SharePoint,$false,$($Credentials.username),$($Credentials.GetNetworkCredential().password))
            }
            $Completed = $true
        }
        Catch {
            if ($retrycount -ge '5') {
                Write-Verbose "Mapping SharePoint drive failed the maximum number of times"
                throw "SharePoint drive mapping failed for '$($SharePoint)': $($Global:Error[0].Exception.Message)"
            } else {
                Write-Verbose "Mapping SharePoint drive failed, retrying in 5 seconds."
                Start-Sleep '5'
                $retrycount++
            }
        }
    }
}

我也使用了以下代码，结果相似或根本没有结果。

#Get User Information
$user = Read-Host "Enter your username"
$username = "$user@MyCompany"
$password = Read-Host "Enter your password" -AsSecureString

#Gathering the location of the Card Formats and Destination folder
$Customer = "$SharePoint\MyCustomer"
$Products = "$Path\$($CustomerName)\Products\"

#Get Documents from SharePoint
$credential = New-Object System.Management.Automation.PSCredential($UserName, $Password)
New-PSDrive -Credential $credential -Name "A" -PSProvider "FileSystem" -Root "$SharePoint"
net use $spPath #$password /USER:$user@corporate

#Get PMDeliverables file objects recursively
Get-ChildItem -Path "$Customer" | Where-Object { $_.name -like 'MS*' } | Copy-Item -Destination $Products  -Force -Verbose

Answer 1

如果没有定义“输入参数”，您需要的完整解决方案并不完全清楚，因此我将提供一些 PowerShell 的 sn-ps，根据您所描述的内容应该可以使用。

我将为您提供各种 OOTB 功能（即 Get-SPWeb 等）的基础知识，但如果需要，我也可以提供这些详细信息。我在脚本中也过于明确了，尽管我知道其中一些行可以被链接、管道等以变得更短、更高效。

此示例将遍历 SharePoint 库的内容并将其下载到您的本地计算机：

$Destination = "C:\YourDestinationFolder\ForFilesFromSP"
$Web = Get-SPWeb "https://YourServerRoot/sites/YourSiteCollection/YourSPWebURL"
$DocLib = $Web.Lists["Your Doc Library Name"]
$DocLibItems = $DocLib.Items

foreach ($DocLibItem in $DocLibItems) {
    if($DocLibItem.Url -Like "*.docx") {
        $File = $Web.GetFile($DocLibItem.Url)
        $Binary = $File.OpenBinary()
        $Stream = New-Object System.IO.FileStream($Destination + "\" + $File.Name), Create
        $Writer = New-Object System.IO.BinaryWriter($Stream)
        $Writer.write($Binary)
        $Writer.Close()
    }
}

这是非常基本的；顶部的变量是您希望在本地计算机上存储下载文件的位置 ($Destination)、您的 SharePoint 站点/Web 的 URL ($Web) 和文档库的名称 (Your Doc Library Name)。

然后，该脚本会遍历库 (foreach ($DocLibItem in $DocLibItems) {}) 中的项目，可选择过滤带有 .docx 文件扩展名的项目并将每个项目下载到您的本地计算机。

您可以通过定位文档库中的特定子文件夹来进一步自定义此设置，按文档的元数据或属性进行过滤，甚至在一个脚本中迭代多个站点、网站和/或库，可选择基于类似的过滤器属性。