CamlQuery對SharePointOnline List 發起查詢請求

最近的項目中遇到了一個需求，須要向SharePointList 查詢Item是否存在，找到了CamlQuery這樣一個方法,可是沒有找到使用這個接口的頻率限制說明文檔，因而就有了這篇隨筆。

新接觸這個方向，請你們多多指教。

 

	#Load SharePoint CSOM Assemblies
	Add-Type -Path "F:\Microsoft.SharePoint.Client.dll"
	Add-Type -Path "F:\Microsoft.SharePoint.Client.Runtime.dll"
	Add-Type -Path "F:\Microsoft.SharePoint.Client.Publishing.dll"
	#Variables for Processing
	$SiteUrl = "<app web url>"
	$ListName="<ListTitle>"
	 
	$UserName="<account>"
	$Password ="<password>"
	  
	#Setup Credentials to connect
	$Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($UserName,(ConvertTo-SecureString $Password -AsPlainText -Force))
	  
	#Set up the context
	$Context = New-Object Microsoft.SharePoint.Client.ClientContext($SiteUrl) 
	$Context.Credentials = $credentials

	
	$List = $Context.web.Lists.GetByTitle('<ListTitle>')

	$Title="Test"
	$start = Get-Date
	for($i=0;$i -le 1000;$i++)
	{
		try 
		{     
		
		$Query = New-Object Microsoft.SharePoint.Client.CamlQuery;
		$Query.ViewXml = "<View><Query><Where><Eq><FieldRef Name='Title' /><Value Type='Text'>"+$Title+"</Value></Eq></Where></Query></View>"
		$ListItems = $list.GetItems($Query);
		$Context.Load($ListItems)
		$Context.ExecuteQuery()
		$midend = Get-Date
		write-host "Test"+$i+"Do"+($midend - $start).TotalSeconds

		"Test"+$i+"Do"+($midend - $start).TotalSeconds | Out-File -Append d:\PsTest.txt
		} 
		catch [System.Exception] 
		{ 
		$midend = Get-Date
		# write-host "Test"$i "Error" ($midend - $start).TotalSeconds
		"Test"+$i+"Error"+($midend - $start).TotalSeconds | Out-File -Append d:\PsTest.txt
        write-host -f red $_.Exception.ToString()    
		}     
	}
		$end = Get-Date
		write-host "Test"$i "Console"($end - $start).TotalSeconds
		"Test"+$i+"Console"+($end - $start).TotalSeconds| Out-File -Append d:\PsTest.txt

　　根據返回的結果統計來看，1000次順序Query請求成功率爲100%，曲線以下

1000次的Query查詢大概用時238.46秒，曲線中縱軸爲響應的返回時間，總體看來曲線還不錯，回來進行一下並行測試的的狀況。