SharePoint concurrent document upload to Document Library

This post shows the code to simulate the concurrent upload to SharePoint document library using a single account.


1. You have installed SharePoint SDK to your development environment

2. You have Office 365 SharePoint online.

3. You know C#.

In my Documents document library, I have a folder named TopFolder.

static void Main(string[] args)


    string filename = “”;

    Thread t = new Thread(Go);


    Thread t1 = new Thread(Go1);


    Thread t2 = new Thread(Go2);


    Thread t3 = new Thread(Go3);


    Thread t4 = new Thread(Go4);









static void Go()




static void Go1()




static void Go2()




static void Go3()




static void Go4()




public static void UploadFile(string filename)


    string siteUrl =”;

    ClientContext clientContext = new ClientContext(siteUrl);

    clientContext.Credentials = SignIn.GetPassword();

    Web rootWeb = clientContext.Web;

    string filePath = filename;

    FileCreationInformation newFile = new FileCreationInformation();

    newFile.Content = System.IO.File.ReadAllBytes(filePath);

    newFile.Url = System.IO.Path.GetFileName(filePath);

    SP.List oList = clientContext.Web.Lists.GetByTitle(@”Documents”);

    var folders = oList.RootFolder.Folders;



    var folder = folders.Where(r => r.Name == “TopFolder”);

    var folder1 = folder.FirstOrDefault();

    Microsoft.SharePoint.Client.File uploadFile = folder1.Files.Add(newFile);



    SP.ListItem item = uploadFile.ListItemAllFields;

    string docTitle = string.Empty;

    item[“Title”] = docTitle;



    Console.WriteLine(“Done {0}”, filename);


For the SignIn method is as below.

public static SharePointOnlineCredentials GetPassword()


    string password = “password”;

    SecureString securePassword = new SecureString();

    foreach(char c in password)




    return (new SharePointOnlineCredentials(“”, securePassword));


About chanmingman

Since March 2011 Microsoft Live Spaces migrated to Wordpress ( till now, I have is over 1 million viewers. This blog is about more than 50% telling you how to resolve error messages, especial for Microsoft products. The blog also has a lot of guidance teaching you how to get stated certain Microsoft technologies. The blog also uses as a help to keep my memory. The blog is never meant to give people consulting services or silver bullet solutions. It is a contribution to the community. Thanks for your support over the years. Ming Man is Microsoft MVP since year 2006. He is a software development manager for a multinational company. With 25 years of experience in the IT field, he has developed system using Clipper, COBOL, VB5, VB6, VB.NET, Java and C #. He has been using Visual Studio (.NET) since the Beta back in year 2000. He and the team have developed many projects using .NET platform such as SCM, and HR based applications. He is familiar with the N-Tier design of business application and is also an expert with database experience in MS SQL, Oracle and AS 400.
This entry was posted in .Net, Cloud, Community, Computers and Internet, Office 365, sharepoint and tagged , . Bookmark the permalink.

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