WP read user_id from JSON and show it - json

Question

I want to show user_id from the following JSON:
[{"username":"Kac26","email":"xklemenx#gmail.com","city":"Slovenj Gradec","id":"15"}]
So I save this JSON to class. I get JSON from my webpage.
My class:
public class Class2
{
public string username{ get; set; }
public string email { get; set; }
public string city { get; set; }
public int id { get; set; }
}
Saving JSON to class:
private async void Login_Tapped(object sender, TappedRoutedEventArgs e)
{
string str = user.Text; //get user name from textbox
HttpClient http = new HttpClient();
var response= await http.GetStringAsync("http://mywebpage.com/events/apis/user.php/user=" + str);
}
Then I want to show user id in textbox_id when i press button.
private void Button_Tapped(object sender, TappedRoutedEventArgs e)
{
textbox_id.Text = Class2.id;
}
But error shows up when I try to reach Class2.id
Anyone know how to do that? And do I save json to class correct?
Thanks!!!

Answer 1

In "Saving JSON to class", I don't see where you are actually doing that. Here's how you would deserialize the string returned by the service:
private async void Login_Tapped(object sender, TappedRoutedEventArgs e)
{
string str = user.Text; //get user name from textbox
HttpClient http = new HttpClient();
var response = await http.GetStringAsync("http://mywebpage.com/events/apis/user.php/user=" + str);
Class2 myClass2 = null;
try
{
var jsonSerializer = new DataContractJsonSerializer(typeof(Class2));
using (var stream = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(response)))
{
myClass2 = jsonSerializer.ReadObject(stream) as Class2;
}
}
catch
{
// serialization error occurred
}
// do something with myClass2
}
Also, FYI if you don't want the property names on your response class to match the JSON properties (for example, not be lower case), you can use DataContractAttribute and DataMemberAttribute on your class like so:
[DataContract]
public class Class2
{
[DataMember(name = "username")]
public string UserName { get; set; }
[DataMember(name = "email")]
public string EMail { get; set; }
[DataMember(name = "city")]
public string SomeCompletelyDifferentNameForCity { get; set; }
[DataMember(name = "id")]
public int Id { get; set; }
}

Answer 2

Class2.id is a static access to a non-static property of Class2. You have to create an instance of Class2 with new Class2(); at some point and then you can access the property.