SharePoint Pals
 | Sign In
Implementing Multi-Threading with MaxDegreeOfParallelism in SharePoint using CSOM – An Insight
by Sathish Nadarajan 21 Nov 2016
SharePoint MVP
Today  :   19     Total  :    1083

In the last article we saw how to use Multi Threading in SharePoint using CSOM. But, I felt some what we don’t have control over the thread in the last implementation. i.e., If we have 1000 files in the source and by the previous code, all the 1000 files may try to upload simultaneously. That may cause definitely an impact over the tenant. (Yes, we faced the request time out, forbidden exceptions etc., )

So, I want the batches to be splitted and then upload the files. i.e., very simple. There should be multi threading. But, I will be deciding my thread count.

 namespace Console.Office365
     using Microsoft.SharePoint.Client;
     using Newtonsoft.Json.Linq;
     using System;
     using System.Collections.Generic;
     using System.IO;
     using System.Linq;
     using System.Threading.Tasks;
     class Program
         static void Main(string[] args)
         public static void UploadFilesMultiThread()
             string[] filePaths = System.IO.Directory.GetFiles("D:\\Temp\\UploadFiles");
             OfficeDevPnP.Core.AuthenticationManager authMgr = new OfficeDevPnP.Core.AuthenticationManager();
             string siteUrl = "https://******";
             string userName = "Sathish@******";
             string password = "**********";
             List<Action> actionsArray = new List<Action>();
             foreach (var filePath in filePaths)
                 actionsArray.Add(new Action(() => UpLoadFiles(authMgr, siteUrl, userName, password, filePath)));
             Action[] array = actionsArray.ToArray();
             System.Threading.Tasks.Parallel.Invoke(new System.Threading.Tasks.ParallelOptions { MaxDegreeOfParallelism = 2 }, array);
             System.Console.WriteLine("Process Completed");
         private static void UpLoadFiles(OfficeDevPnP.Core.AuthenticationManager authMgr, string siteUrl, string userName, string password, string filePath)
             using (var ctx = authMgr.GetSharePointOnlineAuthenticatedContextTenant(siteUrl, userName, password))
                 Web web = ctx.Web;
                 List list = web.Lists.GetByTitle("MyDocumentsLibrary");
                 if (System.IO.File.Exists(filePath))
                     System.Console.ForegroundColor = ConsoleColor.Green;
                     System.Console.WriteLine("Entered into : " + Path.GetFileName(filePath));
                     Folder folder = web.GetFolderByServerRelativeUrl(list.RootFolder.ServerRelativeUrl);
                     folder.UploadFile(Path.GetFileName(filePath), filePath, true);

On the below line, the MaxDegreeOfParallelism Parameter is the one, which decides how many items in the array to be taken at a time simultaneously.

System.Threading.Tasks.Parallel.Invoke(new System.Threading.Tasks.ParallelOptions { MaxDegreeOfParallelism = 2 }, array);

Happy Coding,

Sathish Nadarajan.

blog comments powered by Disqus

SharePoint Pals

SharePoint Pals, a community portal for SharePoint developers, Administrators and End Users. Let's join hands and share the point together.
Read this on mobile


Angular Js Training In Chennai
Advanced Angular Js training with real world developer scenarios
Angular Js, Web Api and Ionic for .Net Developers
All in one client side application development for .Net developers
Angular Js For SharePoint Developers
Get ready for the future. Its no more just C#

Get Connected

SharePoint Resources

SharePoint 2013 and 2010 Web Parts
Free Web Parts with Source Code for SharePoint Community

SharePoint 2013 Books and Tutorials
Collection of free SharePoint 2013 books and tutorials (eBooks, pdfs)

Supported By

Contribute your article and be eligible for a one month Free Subscription for Plural Sight. The Author of the most popular New Article (published in the previous month) will be awarded with a Free One month Plural Sight Subscription. Article can be sent to in a word document.

Related Resources

Recent Tweets

Twitter November 21, 21:08
Implementing Multi-Threading with MaxDegreeOfParallelism in SharePoint using CSOM – An Insight -

Twitter November 21, 12:48
Configure Windows Firewall for SQL Server Analysis Service (SSAS) -

Twitter November 21, 12:46
Implementing Multi-Threading in SharePoint To Upload Files using CSOM C# – An Insight -

Twitter November 20, 21:48
How to Get the Client Context Using App Access token, by passing Client ID using CSOM in SharePoint Office 365 -

Twitter November 18, 21:30
How to Enable Auto Approval For Permission Requests in Community Site Template – Office 2013 using Client Side Object Model (CSOM) C#

Follow us @SharePointPals
Note: For Customization and Configuration, CheckOutRecent Tweets Documentation