Connecting with sharepoint site using CSOM

Question

my code is like below

  try
    {

        string strUserName="abc";
        string strPassword="123";
        ClientContext context = new ClientContext(siteurl);
        var credentials = new NetworkCredential(strUserName, strPassword,"Ext");


        context.Credentials = credentials;
        // The SharePoint web at the URL.
        Web web = context.Web;

        // We want to retrieve the web's properties.
        context.Load(web);

        // Execute the query to the server.
        context.ExecuteQuery();

        // Now, the web's properties are available and we could display 
        // web properties, such as title. 
        System.Console.WriteLine("Web Title");
        System.Console.WriteLine(web.Title);
    }
    catch (Exception ex)
    {
    }

it is giving error "unable to connect remote server"

Answer 1

First thing make sure that the following entities are correctly passed:

• siteurl
• strUserName
• strPassword
• "Ext"

If you're trying to connect to SharePoint Online 2013 then you have to replace, "NetworkCredential" with " SharePointOnlineCredentials ". Here's the code snippet for it:

    string strUserName="abc";
    string strPassword="123";
    SecureString ssPwd = new SecureString();
    strPassword.ToList().ForEach(ssPwd.AppendChar);
    ClientContext context = new ClientContext(siteurl);
    SharePointOnlineCredentials credentials = new SharePointOnlineCredentials(strUserName, ssPwd);

    context.Credentials = credentials;
    // The SharePoint web at the URL.
    Web web = context.Web;

    // We want to retrieve the web's properties.
    context.Load(web);

    // Execute the query to the server.
    context.ExecuteQuery();

Answer 2

接受自签名证书：

ServicePointManager.ServerCertificateValidationCallback += (sender, cert, chain, sslPolicyErrors) => true;