How to get all the sharepoint 2013 site groups using C# client side object model

Question

How to get all the SharePoint 2013 Site Groups using C# Client Side Object Model

1. I am using VS 2013 on my laptop and SP 2013 is on the network

2. I read that I have to use Credentials or equivalent but dont know how

   namespace ConsoleApplication5
   {
       class Program
       {
           static void Main(string[] args)
           {
               // ClientContext - Get the context for the SharePoint Site
               // SharePoint site URL - http://servername/sites/CSOM
               ClientContext clientContext = new
               ClientContext("http://sp2013/");
               // Get the SharePoint web
               Web web = clientContext.Web;
               // Get all the site groups
               GroupCollection groupColl = web.SiteGroups;
               clientContext.Load(groupColl);
               // Execute the query to the server
               clientContext.ExecuteQuery();
   
               foreach (Group group in groupColl)
               {
               // Display the group name
               Console.WriteLine(group.Title);
               }
               Console.ReadLine();
           }
       }
   }   
   

Answer 1

You can do this by Passing NetworkCredentials as below

ClientContext clientContext = new ClientContext("http://sp2013/");
clientContext.Credentials = new NetworkCredential("UserName", "Password","Domain");

Answer 2

to answer my own question SP2010 is by default windows authentication and SP2013 is claims based the below code worked for me

       ClientContext clientContext = new ClientContext("http://sp2013:27898");
        clientContext.ExecutingWebRequest += clientContext_ExecutingWebRequest;
        Web web = clientContext.Web;
        GroupCollection groupColl = web.SiteGroups;
        UserCreationInformation userInfo = new UserCreationInformation();

        clientContext.Load(groupColl);
        clientContext.ExecuteQuery();
        foreach (Group group in groupColl)
        {
            // Display the group name
            Console.WriteLine(group.Title);
        }
        Console.ReadLine();





    }


    static void clientContext_ExecutingWebRequest(object sender, WebRequestEventArgs e)
    {
        try
        {
            e.WebRequestExecutor.WebRequest.Headers.Add("X-FORMS_BASED_AUTH_ACCEPTED", "f");
        }
        catch
        {
            throw;
        }
    }

Answer 3

The only possible issue may be that SharePoint site will have different authentication configured.

Use below code and replace the authenticationMethod with your authentication method and it will work.

In my case authenticationMethod was NTLM

using (ClientContext clientContext = new ClientContext(siteUrl))
{
    CredentialCache myCache = new CredentialCache();
    myCache.Add(new Uri(siteUrl), "authenticationMethod", new NetworkCredential(userName, password));
    clientContext.Credentials = myCache;
    Group grp = null;
    GroupCollection groupColl = clientContext.Web.SiteGroups;
    clientContext.Load(groupColl,
    groups => groups.Include(
    group => group.Title,
    group => group.Id));
    clientContext.ExecuteQuery();
    foreach (Group siteGroup in groupColl)
    {
        console.writeLine(siteGroup.Title);
    }
}