How check data existing or not in c# and data valid json or not

Question

Hi All,

      I am creating on web API for client using complex Model. Structure of model i am giving below

Public Class Organization

{

public Int Id{get; set;}

public string Name {get; set;}

public string ?website { get; set; }

public IEnumerable<Location> get; set; }

public IEnumerable<Contact> get; set; }

}

public class Location

{

public Int Id{get; set;}

public string Name {get; set;}

}

public class Contact

{

public Int Id{get; set;}

public string Name {get; set;}

}

As you can see Organization is my main class inside that i am using location and contact classes as list. In foreach loop i am checking condition like below

if (OrgData.contact.Count() > 0)

{

}

But user not passing any location or contact information how i manage while retrieving data. The above condition will fail. These location and contact is not mandatory. And also possibility in valid json data. How can i check data is valid or not?

Answer 1

you need to decide if contact defaults to empty collection, or can be null. if you want a default, then create an instance of the collection in Organization constructor. if not test for null:

if (OrgData.contact != null && OrgData.contact.Count() > 0)

or

if (OrgData.contact?.Count() > 0)