NullReferenceException: Object reference not set to an instance of an object

How can i access the `public string lastMessage` in Foo.cs from Bar.js?

Foo.cs

Code:

// Requires: Barnamespace Oxide.Plugins
{
    [Info("Foo", "Game Limits", "1.0.6")]    public class Foo : RustPlugin
    {
        public Bar bar = new Bar();
        public string lastMessage = "";
       
        void Init()
        {
            bar.Setup(this);
        }
       
        public void Print()
        {
            Puts(lastMessage);
        }
    }
}

Bar.cs

Code:

namespace Oxide.Plugins
{
    [Info("Bar", "Game Limits", "1.0.0")]    public class Bar : RustPlugin
    {
        Foo foo;
       
        public void Setup(Foo foo)
        {
            this.foo = foo;
        }
       
        object OnPlayerChat(ConsoleSystem.Arg arg)
        {
            foo.lastMessage = "test";
            foo.Print();
           
            return false;
        }
    }
}

Code:

Failed to call hook 'OnPlayerChat' on plugin 'Bar v1.0.0' (NullReferenceException: Object reference not set to an instance of an object)
  at Oxide.Plugins.Bar.OnPlayerChat (.Arg arg) [0x00000] in <filename unknown>:0
  at Oxide.Plugins.Bar.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x00000] in <filename unknown>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00000] in <filename unknown>:0

 

It seems that foo is null when called from the event OnPlayerChat. I dont realy get what you mean that it needs to a method?

 

Do you mean this variable `foo.lastMessage = "test";` lastMessage or foo ?

 

I mean, even when i call just the mehods, this.foo is null when accessed from an event.

`Testing B wheeee` will get printed every 5 seconds. However, when typing it says `Is null`.

(I havent touched C# for like 6 years, i am more of a NodeJS guy, but still want to figure out what is happening).

Code:

namespace Oxide.Plugins
{
    [Info("Bar", "Game Limits", "1.0.2")]    public class Bar : RustPlugin
    {
        Foo foo;
      
        public void Setup(Foo foo)
        {
            this.foo = foo;
          
            timer.Repeat(5f, 0, () =>
            {
                if (foo == null) {
                    Puts("Is null");
                } else {
                    foo.Print("Testing B wheeee");
                }
            });
        }
      
        object OnPlayerChat(ConsoleSystem.Arg arg)
        {
            if (foo == null) {
                Puts("Is null");
                return false;
            }
          
            foo.Print("Testing A wheeee");
          
            return false;
        }
    }
}

 

Well, i have set it to `this`. That is why i am really confused about what is going on

See: bar.Setup(this);

Code:

// Requires: Barnamespace Oxide.Plugins
{
    [Info("Foo", "Game Limits", "1.0.0")]    public class Foo : RustPlugin
    {
        public Bar bar = new Bar();
      
        void Init()
        {
            bar.Setup(this);
        }
      
        public void Print(string str)
        {
            Puts("Message: " + str);
        }
    }
}

 

Make it static

 

Yep, that is what i did

Still wondering why it happens tho :/