windows phone 8 sdk cannot connect

Question

I downloaded the windows phone 8 sdk and the sharepoint windows phone sdk.

Both installed fine.

But whenever I try to create a clientcontext and connect to a sharepoint (on premise and online) I just get the message in the execute query failed: Unable to connect to the site 'my url'. Please check that the network is available and the url is correct.

I tried both sharepoint online and on premise. Has anybody experience with the windows phone sharepoint sdk and can tell me why i cannot get a connection?

here is my code:

ClientContext ctx = new ClientContext("https://url/");

Authenticator auth = new Authenticator();
ctx.Credentials = auth;

web = ctx.Web;
ctx.Load(web);
ctx.ExecuteQueryAsync(LoadOK, LoadFailed);

Answer 1

If you have SharePoint on-premises this code should work:

ClientContext m_Context = new ClientContext(SiteUrl);
NetworkCredential credentials = new NetworkCredential(Username, Password);
m_Context.Credentials = credentials;

If you would like to connect to SharePoint Online, the code should look like this (this will popup Office 365 login screen for user):

ClientContext m_Context = new ClientContext(SiteUrl);
Authenticator at = new Authenticator();
// Allows authenticator to save cookies for future usage
at.CookieCachingEnabled = true;                 
// In case of Microsoft Online federated authentication, set ADFS authentication scheme preference for passive authentication
// Example, to set client preference for SAML 2.0 username-password authentication scheme: 
at.FederationPassiveAuthUri = "urn:oasis:names:tc:SAML:2.0:ac:classes:Password"; 
m_Context.Credentials = at;

Answer 2

The Windows SDK is installed as part of the Desktop development with C++ workload in the Visual Studio Installer. A standalone version is available at Windows SDK. Open the shortcut menu for the project node, and choose Retarget projects. (In earlier versions of Visual Studio, choose Retarget SDK Version.)

Regards, Peter