convert json string to c# list of objects (string comes from request as NULL)

Question

I have the following code to convert json string to list of objects:

 public class rest_all
 {
 public string restaurants { get; set; } 
 }
 public class rest_all_data
 {
 public string RestaurantName { get; set; }
 public string CategoryName { get; set; }
 public string FourSquareID { get; set; } 
 }
 public class rest_collection 
 {
 public IEnumerable<rest_all_data> rest_all_data { get; set; }
 }

and here is the main function:

public void AddRestaurantMultiple (rest_all rest_all)
 {
 JavaScriptSerializer serializer = new JavaScriptSerializer();
 rest_collection collection = serializer.Deserialize<rest_collection>(rest_all.restaurants);
 }

the problem is that when I make an http request with a json string like this:

{"restaurants" : [{"RestaurantName":"a","CategoryName":"b","FourSquareID":"c"},{"RestaurantName":"d","CategoryName":"e","FourSquareID":"f"}]

it always gives me null at the AddRestaurantMultiple function...what is it am i doing wrong??

• Dipen Shah: possible duplicate of Convert Json String to C# Object List
• Jon Skeet: What do you mean by "it always gives me a null"? That's very unclear. It would help if you could provide a short but complete program demonstrating the problem, ideally using idiomatic .NET naming...
• Karl Anderson: How are you "calling" to the class that contains the AddRestaurantMultiple function? Is this a client-side request for the JSON or server-side?
• Abdallah: I am using fiddler to generate the request...and by null i mean when i send a request to the input of AddRestaurantMultiple function the resaurant string in rest_all class is always NULL

Answer 1

Your model should be

public class Restaurant
{
 public string RestaurantName { get; set; }
 public string CategoryName { get; set; }
 public string FourSquareID { get; set; }
}
public class rest_collection
{
 public List<Restaurant> restaurants { get; set; }
}

---

var result = new JavaScriptSerializer().Deserialize<rest_collection>(yourjson);

• Abdallah: the problem is that when I do an http request using fiddler...the json string in the AddRestaurantMultiple always comes as null
• Eser: @Abdallah Given your json in question above code works correctly. I don't know what/how you are doing with fiddler.
• Abdallah: this is the message i send using fiddler.... {"restaurants:[{"RestaurantName":"a","CategoryName":"b","FourSquareID":"c"},{"RestaurantName":"d","CategoryName":"e","FourSquareID":"f"}]}
• Eser: @Abdallah I don't know your server, its API and what it expects as input to its methods. So I have no idea what you are doing...