powershell - SharePoint CSOM PowerShell不返回Web.Folders属性

Question

此处的目标是从此PowerShell代码开始访问Web.Folders属性。

Connect-SPOnline –Url https://mysite.sharepoint.com;
$web = Get-SPOWeb;
$web | Get-Member | sort name

从该列表成员中，我可以看到具有以下内容的“文件夹”属性

Definition:
----------                                                                                                                                                  
Microsoft.SharePoint.Client.FolderCollection, 
Microsoft.SharePoint.Client, 
Version=16.1.0.0, 
Culture=neutral, 
PublicKeyToken=71e9bce111e9429c Folders {get;}

因此，我是否应该能够使用以下代码片段检索“文件夹属性”？

$ctx = Get-SPOContext;
$folders = $web.Folders;
$ctx.Load($folders);
$ctx.ExecuteQuery();
$folders;

$folders仅返回以下未初始化的消息。

format-default : The collection has not been initialized. It has not been requested or the request has not been
executed. It may need to be explicitly requested.
    + CategoryInfo          : NotSpecified: (:) [format-default], CollectionNotInitializedException
    + FullyQualifiedErrorId : Microsoft.SharePoint.Client.CollectionNotInitializedException,Microsoft.PowerShell.Comma
   nds.FormatDefaultCommand

Answer 1

不要让此错误消息使您感到困惑。即使未从服务器请求客户端对象(文件夹集合)时，通常会发生此错误，但在以下特定情况下，由于以下原因会发生此错误:

$folders

因此，使用指定的代码片段文件夹集合可以从服务器正确检索:

$web = $ctx.Web
$folders = $web.Folders
$ctx.Load($folders)
$ctx.ExecuteQuery()

为了确定是否已从服务器请求客户端对象，请使用 ClientObject.IsObjectPropertyInstantiated method ，例如:

if ($web.IsObjectPropertyInstantiated('Folders') -eq $true)
{
   Write-Host "Folder collection has been loaded"
   #... 

}

以下示例演示如何访问collection中的文件夹及其属性。

示例1.如何迭代文件夹集合并打印其名称:

$folders.GetEnumerator() | % { 
    Write-Host "Folder name: $($_.Name)" 
}

示例2.如何通过索引访问文件夹并打印其名称:

if($folders.Count -gt 0){
    $folder = $folders[0] #get first item
    Write-Host "Folder name: $($folder.Name)" 
}