Office365 SharePoint Online Add User To Role Using CSOM

Microsoft introduced a new functionality to interact with CSOM. It has SharePointOnlineCredentials, which will handle any authentication; you should need to do.

This class is included in version 15 of Microsoft.SharePoint.Client dll.

Method

Using this method, it is a simple way to connect to Sharepoint Online sites.

var onlineCredentials = new SharePointOnlineCredentials(Configuration.ServiceUserName, securePassword);

Configure your credentials in a separate configuration class.

private class Configuration
        {
  public static string ServiceSiteUrl = "https:// https://gowthamr.sharepoint.com";
  public static string ServiceUserName = "[email protected]";
  public static string ServicePassword = "xxxxxxxxxx";
        }


//Create new Context with interating SharePoint Online sites,
static ClientContext GetonlineContext()
        {
            var securePassword = new SecureString();
            foreach (char c in Configuration.ServicePassword)
            {
                securePassword.AppendChar(c);
            }

            var onlineCredentials = new SharePointOnlineCredentials(Configuration.ServiceUserName, securePassword);

            var context = new ClientContext(Configuration.ServiceSiteUrl);
            context.Credentials = onlineCredentials;

            return context;
        }

//Now we will see about Create A SharePoint List using CSOM method,
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint.Client;

namespace O365SPAddUsertoRole
{
    class Program
    {


     private class Configuration
        {
                public static string ServiceSiteUrl = "https:// https://gowthamr.sharepoint.com";
                public static string ServiceUserName = "[email protected]";
                public static string ServicePassword = "xxxxxxxxxx";
        }

                 static ClientContext GetonlineContext()
                          {
                                    var securePassword = new SecureString();
                                    foreach (char c in Configuration.ServicePassword)
                                    {
                                        securePassword.AppendChar(c);
                                    }
                                    var onlineCredentials = new SharePointOnlineCredentials(Configuration.ServiceUserName, securePassword);
                                    var context = new ClientContext(Configuration.ServiceSiteUrl);
                                    context.Credentials = onlineCredentials;
                                    return context;
                          }


        static void Main(string[] args)
        {
            var context=GetonlineContext();
            Web web = context.Web;
            Principal user = context.Web.SiteUsers.GetByLoginName(@"X");
            RoleDefinition readDef = context.Web.RoleDefinitions.GetByName("Read");
            RoleDefinitionBindingCollection roleDefCollection = new RoleDefinitionBindingCollection(context);
            roleDefCollection.Add(readDef);
            RoleAssignment newRoleAssignment = context.Web.RoleAssignments.Add(user, roleDefCollection);
            context.ExecuteQuery();

        }
    }
}

Run this code and check your SharePoint Site. New Site list is created successfully.

 

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