Failed to connect to SharePoint by Client Object Model

Question

Hello,

 I write the following code to connect to share point by client object model :

  ClientContext context = new ClientContext("http://servername:8010");
   context.Credentials = new System.Net.NetworkCredential(@"admin", "123", "TestDomain");
    context.ExecutingWebRequest += clientContext_ExecutingWebRequest;

I get the following exception :

  Unhandled Exception: System.Net.WebException: Unable to connect to the remote se
rver ---> System.Net.Sockets.SocketException: A connection attempt failed becaus
e the connected party did not properly respond after a period of time, or establ
ished connection failed because connected host has failed to respond 

How Can I solve it ?

---

ASk

Answer 1

Hi Himo,

if you are connecting to office 365 then use the following code:

 using (srcContext = new ClientContext(txtUrlFrom.Text))
                {

                    SecureString passWord = new SecureString();
                    foreach (char c in txtPasswordFrom.Text.ToCharArray()) passWord.AppendChar(c);
                    srcContext.Credentials = new SharePointOnlineCredentials(txtUserNameFrom.Text, passWord);
                }

if you are using on premise SharePoint 2013 use this code:

 using (srcContext = new ClientContext(txtUrlFrom.Text))
                {

                    NetworkCredential credentials = new NetworkCredential(txtUserNameFrom.Text, txtPasswordFrom.Text);
                }

example for retrieving 

 Web srcWeb = srcContext.Web;
            List srcList = srcWeb.Lists.GetByTitle(srcLibrary);
            ListItemCollection col = srcList.GetItems(new CamlQuery());
            srcContext.Load(srcList.RootFolder);
            srcContext.Load(srcList.RootFolder.Folders);

            srcContext.Load(col);
            srcContext.ExecuteQuery();

Let me know if this helps

---

Kind Regards, John Naguib Technical Consultant/Architect MCITP, MCPD, MCTS, MCT, TOGAF 9 Foundation

Answer 2

Hi,

If you working SharePoint 2010 Client Object Model on an SSL enabled SharePoint 2010 site, here is a blog for your reference:

http://blogs.msdn.com/b/sridhara/archive/2010/10/19/working-with-sharepoint-2010-client-object-model-on-an-ssl-enabled-site.aspx

If you have a claims based site set up supporting both Windows and forms authentication, you can see the link below:

http://sharepointdragons.com/2012/04/20/authentication-when-using-the-sharepoint-client-object-model/

Best Regards

---

Dennis Guo
TechNet Community Support

Answer 3

Hi Himo,

Thanks for posting your issue, Below is the correct code to access SharePoint 2013 Site using Client Object Model.

ClientContext context = new ClientContext(lServerUrl);
        context.AuthenticationMode = ClientAuthenticationMode.Default;
        context.Credentials = new System.Net.NetworkCredential("user", "password", "domain");        

        Web web = context.Web;

Another code snippet 

using System.Net;
using Microsoft.SharePoint.Client;

using (ClientContext context = new ClientContext("http://yourserver/")) {
    context.Credentials = new NetworkCredential("user", "password", "domain");
    List list = context.Web.Lists.GetByTitle("Some List");
    context.ExecuteQuery();

    // Now update the list.
}

I hope this is helpful to you. If this works, Please mark it as Answered.

Regards,

Dharmendra Singh (MCPD-EA | MCTS)

Blog : http://sharepoint-community.net/profile/DharmendraSingh