Service Error when accessing windows azure DB from windows phone - web-services

Question

receiving the error:
The EntitySet 'User' is not defined in the EntityContainer 'festDBEntities'. Near simple identifier, line 1, column 46.
my app code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using FestCloud.festDBService;
namespace FestCloud
{
public partial class MainPage : PhoneApplicationPage
{
private Service1Client _serviceClient;
// Constructor
public MainPage()
{
InitializeComponent();
_serviceClient = new Service1Client();
_serviceClient.LoginUserCompleted += new EventHandler<LoginUserCompletedEventArgs>(_serviceClient_LoginUserCompleted);
}
void _serviceClient_LoginUserCompleted(object sender, LoginUserCompletedEventArgs e)
{
if ((e.Error == null) && (e.Result != null))
{
MessageBox.Show("Welcome " + e.Result + " !");
}
else
{
MessageBox.Show("Could not log in. Please check user name/password and try again.");
}
}
private void logInButton_Click(object sender, RoutedEventArgs e)
{
_serviceClient.LoginUserAsync(userNameTextBox.Text, passwordTextBox.Text);
}
private void newAccountButton_Click(object sender, RoutedEventArgs e)
{
NavigationService.Navigate(new Uri("/Register.xaml", UriKind.Relative));
}
}
}
and my service code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
using System.Data.Objects;
namespace CloudServiceRole
{
// NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "Service1" in code, svc and config file together.
public class Service1 : IService1
{
public void AddUser(string userName, string password)
{
using (var context = new festDBEntities())
{
context.AddToUsers(new User()
{
UserName = userName,
Password = password,
});
context.SaveChanges();
}
}
public string LoginUser(string username, string password)
{
string query = #"SELECT value User.UserName FROM festDBEntities.User AS User WHERE User.UserName = #username AND User.Password = #password";
ObjectParameter[] parameters = new ObjectParameter[2];
parameters[0] = new ObjectParameter("username", username);
parameters[1] = new ObjectParameter("password", password);
using (var context = new festDBEntities())
{
ObjectQuery<string> results = context.CreateQuery<string>(query, parameters);
foreach (string result in results)
{
if (result != null)
{
return result;
}
}
}
return null; ;
}
}
}
my IService.cs file:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.ServiceModel;
using System.ServiceModel.Web;
using System.Text;
namespace CloudServiceRole
{
// NOTE: You can use the "Rename" command on the "Refactor" menu to change the interface name "IService1" in both code and config file together.
[ServiceContract]
public interface IService1
{
[OperationContract]
void AddUser(string userName, string password);
[OperationContract]
string LoginUser(string userName, string password);
// TODO: Add your service operations here
}
}
My DB contains UserId(int)-PK, UserName(nvarchar), Password(nvarchar)
with others to be added after I get basics working.
any ideas on whats causing the error or my code in general?
Many thanks,MH

Answer 1

That doesn't sound like a problem with the phone calling it, have you tried calling it from something else? Have you tried calling a web service without parameters to see if that works?
You may want to check out this sample to get you started:
http://www.c-sharpcorner.com/uploadfile/dhananjaycoder/hosting-wcf-service-in-windows-azure-and-consuming-in-window-7-phone-app/
Also, I would suggest WCF REST and returning JSON like:
http://www.c-sharpcorner.com/UploadFile/dhananjaycoder/how-to-consume-wcf-rest-service-returning-json-in-windows-ph/

Answer 2

This looks like an Entity Framework issue. The most likely cause is the festDBEntities class doesn’t contain a property named User(Perhaps it is named Users?). Please check your object model first. From my experience, you can also write a LINQ query instead of an object query. LINQ query is strongly typed, and can help us to remove such errors at compile time.
In addition, please also add Entity Framework to the tags so more Entity Framework experts will involve in this thread to provide further suggestions.
Best Regards,
Ming Xu.