Styjun

How can I call my class list from controller?

Here are my models:

public class AuthJsonResponses

 public int Code get; set; 
 public string Jwt get; set; 
 //public string[] Message get; set; 
 public List<RootObject> Message get; set; 


public class RootObject

 public string msg get; set; 
 public string code get; set; 

This is what I call in the controller:

List<RootObject> rootObj = new List<RootObject>();
rootObj[0].code = "success_04";
rootObj[0].msg = "Access granted";
JsonRes.Message = rootObj;

However there it seems there is a problem with the range which I don't know.
What's wrong with my code?

Thanks in advance.

You are handling the list like an array, which will not work, you need to make use of the Add method, for example

rootObj.Add(new RootObj
 code = "success_04",
 msg = "Access granted"
);

You can also make use of the AddRange method to add multiple objects, for example

rootObj.AddRange(new List<RootObj>new RootObj
 code = "success_04",
 msg = "Access granted"
, new RootObj
 code = "success_05",
 msg = "Access denied"
);

You can do one of the things below :

 List<RootObject> rootObj = new List<RootObject>();
 var newObj=new RootObject()
 
 code = "success_04",
 msg = "Access granted"
 ;
 rootObj.Add(newObj);
 List<RootObject> rootObj1 = new List<RootObject>()
 
 new RootObject()
 
 code = "success_04",
 msg = "Access granted"
 
 ;

and then

JsonRes.Message = rootObj;

As you are using List actually you can use methods inherited from IEnumerable class, as List is an implementation of IEnumerable.

You can do this:

List<RootObject> rootObj = new List<RootObject>();
//delete this---- rootObj[0].code = "success_04";
//delete this---- rootObj[0].msg = "Access granted";
//use this
rootObj.Add(new RootObject
code = "success_04",
msg = "Access Granted"
)
JsonRes.Message = rootObj;

Access your AuthJsonResponses instance directly. First, update that class to make Message have a private setter and instantiate it as a List<RootObject>

public class AuthJsonResponses

 public int Code get; set; 
 public string Jwt get; set; 
 public List<RootObject> Messages get; private set; = new List<RootObject>();


public class RootObject

 public string msg get; set; 
 public string code get; set; 

In your code, directly add the object to the Message property. I suggest renaming it to Messages to indicate it's a collection

jsonRes.Messages.Add(new RootObjectmsg ="Access granted", code="success_04");

The problem you are facing is that your are refernecing first element of a list right afeter initializing the list! Initialization itself just creates the object of List class, it does not create any elements!

So, you have to create objects of RootObject class yourself and then add it to list:

// create object
var r = new RootObject();
r.code = "success_04";
r.msg = "Access granted";
// add it to list
rootObj.Add(r);