public ActionResult CreateTask(SPTask task, string SPHostUrl)
{
var spContext = SharePointContextProvider.Current.GetSharePointContext(HttpContext);
using (var ctx = spContext.CreateUserClientContextForSPHost())
{
if (ctx != null)
{
TaskHelper.Addtask(ctx, task);
}
}
return(RedirectToAction("Alltasks", new { SPHostUrl = SPHostUrl }));
}