Upload File To SharePoint Online(office 365) Library Invokes Error

Question

How can one resolve this runtime error?

Error

Could not load file or assembly 'Microsoft.SharePoint.Library, Version = 14.0.0.0, Culture = neutral, PublicKeyToken = 71e9bce111e9429c' or one of its dependencies. The system can not find the file specified.

CODE

string destUrl = "URL";
string destFileUrl = destUrl  + "biblioteca" + "/text.txt";
using(SPWeb site = new SPSite(destUrl).OpenWeb())
{
    site.AllowUnsafeUpdates = true;

    FileStream fileStream = File.Open("FILE" , FileMode.Open);

    site.Files.Add(destFileUrl, fileStream, true/*overwrite*/);

    fileStream.Close();
}

Answer 1

This works for me.

using (ClientContext clientContext = new ClientContext("SHAREPOINT URL")) {
    SecureString passWord = new SecureString();
    foreach (char c in "PASSWORD".ToCharArray()) passWord.AppendChar(c);
    clientContext.Credentials = new SharePointOnlineCredentials("ACOUNT.onmicrosoft.com", passWord);
    Web web = clientContext.Web; 
    FileCreationInformation newFile = new FileCreationInformation();
    newFile.Content = System.IO.File.ReadAllBytes(FILE);
    newFile.Url = NAMEFORTHEFILE;
    
    List docs = web.Lists.GetByTitle("LIBRARY NAME");
    Microsoft.SharePoint.Client.File uploadFile = docs.RootFolder.Files.Add(newFile);

    clientContext.ExecuteQuery();
}

Answer 2

string fileName = @"C:\AddUser.aspx";
using (var context = new   ClientContext("https://yourdomain.com")) {
    var passWord = new SecureString();
    foreach (var c in "YourPassword") passWord.AppendChar(c);
    context.Credentials = new SharePointOnlineCredentials("YourUsername", passWord);
    var web = context.Web;
    var newFile = new FileCreationInformation {
        Content = System.IO.File.ReadAllBytes(fileName),
        Url = Path.GetFileName(fileName)
    };
    var docs = web.Lists.GetByTitle("Pages");
    Microsoft.SharePoint.Client.File uploadFile = docs.RootFolder.Files.Add(newFile);
    context.ExecuteQuery();
}

Answer 3

You cannot use the server side object model to upload files to SharePoint Online.

One has to use the Client Object Model to upload files to SharePoint online.

More Info

Office 365 Sharepoint Upload Files to Documents Library

Answer 4

Have you encountered this error: The partner returned a bad sign-in name or password error. For more information, see Federation Error-handling Scenarios.

I have the following codes:

                NetworkCredential Cred = new NetworkCredential(ConfigurationManager.AppSettings["Username"], ConfigurationManager.AppSettings["Password"], ConfigurationManager.AppSettings["Domain"]);
                SecureString PassWord = new SecureString();

                foreach (char c in ConfigurationManager.AppSettings["Password"].ToCharArray()) PassWord.AppendChar(c);

                clientContext.Credentials = new SharePointOnlineCredentials(ConfigurationManager.AppSettings["Username"], PassWord);

                Web web = clientContext.Web;

                clientContext.Load(web);