SharePoint列表日期/時間字段轉換爲通用時間

Question

我想在午夜的日期/時間字段設置爲一個值：

# Tuesday, May 19, 2015 12:00:00 AM 
$Properties = @{CompletedDate = [DateTime]::Today} 
... 

$Payload = $Properties | ConvertTo-Json 

$headers = @{ 
    "X-HTTP-Method" = "MERGE"; 
    "If-Match" = "*" 
} 

Invoke-WebRequest -Uri $url -Method Post -UseDefaultCredentials -Headers $headers -ContentType "application/json" -Body $Payload 

它的出現，然而，該日期被調整爲通用時間：

<entry> 
    <content> 
    <m:properties> 
     ... 
     <d:CompletedDate m:type="Edm.DateTime">2015-05-19T04:00:00</d:CompletedDate> 

如果我想CompletedDate實際2015-05-19T00：00：00，什麼是保證這一目標的最佳方式是什麼？

我想，一個選擇是：

$today = Get-Date -Date ('{0}/{1}/{2} 00:00:00Z' -f (Get-Date).year, (Get-Date).month, (Get-Date).day) 

$Properties = @{CompletedDate = $today} 

有沒有更有效的方法是什麼？

Answer 1

由於的SharePoint期望在本地時間被指定的日期和時間值，下面的例子顯示瞭如何保存2015-05-19T00:00:00值：

$completedDate = Get-Date -Date "2015-05-19T00:00:00" #UTC 
$completedDate = $completedDate.ToLocalTime() 

$ItemProperties = @{ 
     Title = "Approval Task"; 
     CompletedDate = $completedDate}