客户端 SharePoint PowerShell - 获取列表项 - 集合尚未初始化

Question

在 SharePoint 2013 上，我尝试使用客户端 SharePoint PowerShell 获取列表项。即使对于字段 Id 或 Title，我也会遇到此错误：集合尚未初始化。我不知道如何包含字段。我在 C# 或 JavaScript 中找到许多示例，但在客户端 powershell 中找到 none。

这是我的代码（returns 正确的项目数）：

Function New-Context([String]$WebUrl) {
    $context = New-Object Microsoft.SharePoint.Client.ClientContext($WebUrl)
    $context.Credentials = [System.Net.CredentialCache]::DefaultNetworkCredentials
    $context
}

Function Get-List([Microsoft.SharePoint.Client.ClientContext]$Context, [String]$ListTitle) {
    $list = $context.Web.Lists.GetByTitle($ListTitle)
    $context.Load($list)
    $context.ExecuteQuery()
    $list 
}

$context = New-Context -WebUrl "http://mysharepoint.com/sites/qp"
$list = Get-List -Context $context -ListTitle "QP-Configuration"

$query = [Microsoft.SharePoint.Client.CamlQuery]::CreateAllItemsQuery()
$items = $list.GetItems($query)
$context.Load($items)
$context.ExecuteQuery()

$items.Count
$items[0]

foreach($item in $items)
{
   $item.Id
}

$context.Dispose()

Answer 1

错误是尝试获取完整的项目：$items[0] 或使用 $item.Title 而不是 $item["Title"]

的列值

正确的代码是：

#Import the required DLL
Add-Type -Path 'C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\ISAPI\Microsoft.SharePoint.Client.dll'

Function New-Context([String]$WebUrl) {
    $context = New-Object Microsoft.SharePoint.Client.ClientContext($WebUrl)
    $context.Credentials = [System.Net.CredentialCache]::DefaultNetworkCredentials
    $context
}

Function Get-List([Microsoft.SharePoint.Client.ClientContext]$Context, [String]$ListTitle) {
    $list = $context.Web.Lists.GetByTitle($ListTitle)
    $context.Load($list)
    $context.ExecuteQuery()
    $list 
}

$context = New-Context -WebUrl "http://mysharepointsite.com/sites/qp"
$list = Get-List -Context $context -ListTitle "QP-Configuration"

$query = [Microsoft.SharePoint.Client.CamlQuery]::CreateAllItemsQuery()
$items = $list.GetItems($query)
$context.Load($items)
$context.ExecuteQuery()

$items.Count

foreach($item in $items)
{
   $item["Title"]
}

$context.Dispose()

Answer 2

在行中按索引获取特定列表项时：

$items[0]

或遍历 Microsoft.SharePoint.Client.ListItemCollection:

的集合

foreach($item in $items)
{
   #...
}

每个属性对象都假定在 PowerShell 中初始化，但 Microsoft.SharePoint.Client.ListItem 情况并非如此，因为只能检索特定的属性子集，这就是为什么会出现此错误。

要检索列表项值，我建议通过 ListItem.FieldValues 属性:

访问它们

#get list items values
$dataValues = @()
$items.GetEnumerator() | % { 
    $dataValues += $_.FieldValues 
}

例子

$query = [Microsoft.SharePoint.Client.CamlQuery]::CreateAllItemsQuery()
$items = $list.GetItems($query)
$context.Load($items)
$context.ExecuteQuery()

$dataValues = @()
$items.GetEnumerator() | % { 
    $dataValues += $_.FieldValues 
}

$dataValues.Count #determine the amount of items
$dataValues[0]  #access item by index

#iterate through list items and print a specific field value, for example FileRef 
foreach($item in $dataValues)
{
   $item.FileRef
}

客户端 SharePoint PowerShell - 获取列表项 - 集合尚未初始化

Client-side SharePoint PowerShell - Get list items - The collection has not been initialized

powershell

sharepoint

sharepoint-clientobject

sharepoint-2013