C#•9mo ago

❔ Json Deserialiser throws NullReferenceException when deserializing an array

36 Replies

Fypur•9mo ago

cs here has a value of

"[{\"Key\":null,\"MouseButton\":null,\"ControllerButton\":null},{\"Key\":null,\"MouseButton\":null,\"ControllerButton\":null}]"

"[{\"Key\":null,\"MouseButton\":null,\"ControllerButton\":null},{\"Key\":null,\"MouseButton\":null,\"ControllerButton\":null}]"

Im literally serializing something and deserializing it and it throws an error, Im so confused this works fine with an int instead of a Control, or with the c array set to be empty

Angius•9mo ago

I mean, yes it works with an int Because it's a simple type I don't suppose those... Winforms controls or whatever they are will be easily serializeable

Fypur•9mo ago

They're a custom class It's basically just 3 enums It serializes just fine, it just doesn't work deserializing

Angius•9mo ago

If they're enums, they should serialize fine

Fypur•9mo ago

that's what Im saying but it ain't working

Angius•9mo ago

How are you serializing it?

Fypur•9mo ago

Control[] c = new Control[] { new Control(), new Control() };
string cs = JsonSerializer.Serialize(c);
c = JsonSerializer.Deserialize<Control[]>(cs);

Control[] c = new Control[] { new Control(), new Control() };
string cs = JsonSerializer.Serialize(c);
c = JsonSerializer.Deserialize<Control[]>(cs);

that's the whole code no more no less

Angius•9mo ago

Well You're serializing them empty Ah, wait

Fypur•9mo ago

well it should work still

Angius•9mo ago

Yeah

TheRanger•9mo ago

are Keys, MouseButton and Buttons enum?

Fypur•9mo ago

yes the serializing part goes fine, and then it just doesn't wanna work on deserializing shit you can compile on discord now?

MODiX•9mo ago

Angius

REPL Result: Success

using System.Text.Json;

enum Foo {A, B, C}
class Control {
    public Foo? Foo { get; set; }
}

Control[] c = new Control[] { new Control(), new Control() };
string cs = JsonSerializer.Serialize(c);
c = JsonSerializer.Deserialize<Control[]>(cs);

new { cs, c }

using System.Text.Json;

enum Foo {A, B, C}
class Control {
    public Foo? Foo { get; set; }
}

Control[] c = new Control[] { new Control(), new Control() };
string cs = JsonSerializer.Serialize(c);
c = JsonSerializer.Deserialize<Control[]>(cs);

new { cs, c }

Result: <>f__AnonymousType0#1<string, Control[]>

{
  "cs": "[{\"Foo\":null},{\"Foo\":null}]",
  "c": [
    {
      "foo": null
    },
    {
      "foo": null
    }
  ]
}

{
  "cs": "[{\"Foo\":null},{\"Foo\":null}]",
  "c": [
    {
      "foo": null
    },
    {
      "foo": null
    }
  ]
}

Compile: 621.427ms | Execution: 108.342ms | React with ❌ to remove this embed.

Angius•9mo ago

It works

Fypur•9mo ago

huhh

Angius•9mo ago

Maybe because it's a struct...?

TheRanger•9mo ago

works here

MODiX•9mo ago

Angius

REPL Result: Success

using System.Text.Json;

enum Foo {A, B, C}
struct Control {
    public Foo? Foo { get; set; }
}

Control[] c = new Control[] { new Control(), new Control() };
string cs = JsonSerializer.Serialize(c);
c = JsonSerializer.Deserialize<Control[]>(cs);

new { cs, c }

using System.Text.Json;

enum Foo {A, B, C}
struct Control {
    public Foo? Foo { get; set; }
}

Control[] c = new Control[] { new Control(), new Control() };
string cs = JsonSerializer.Serialize(c);
c = JsonSerializer.Deserialize<Control[]>(cs);

new { cs, c }

Result: <>f__AnonymousType0#1<string, Control[]>

{
  "cs": "[{\"Foo\":null},{\"Foo\":null}]",
  "c": [
    {
      "foo": null
    },
    {
      "foo": null
    }
  ]
}

{
  "cs": "[{\"Foo\":null},{\"Foo\":null}]",
  "c": [
    {
      "foo": null
    },
    {
      "foo": null
    }
  ]
}

Compile: 644.121ms | Execution: 104.912ms | React with ❌ to remove this embed.

Angius•9mo ago

Yeah nah, works with a struct

Fypur•9mo ago

It's all enums

Fypur•9mo ago

This is the constructor

TheRanger•9mo ago

Monogame?

Fypur•9mo ago

yup The Control class is a custom one I made

TheRanger•9mo ago

i have monogame, i can test

Fypur•9mo ago

well yeah but it doesn't have anything to do with it it should be basic c#

TheRanger•9mo ago

in case whats Fiourp.MouseButton ? probably an enum u made

Fypur•9mo ago

Custom enum

Fypur•9mo ago

bruh I just updated dotnet And now it works

Fypur•9mo ago

TheRanger•9mo ago

yeah i just ran it right now and it works

Fypur•9mo ago

thank you all for the help the problem was me running dotnet 6.2 and i needed dotnet 6.4 yay defnitly not frustrated lol

TheRanger•9mo ago

weird

Fypur•9mo ago

yea Ig the small patches do matter

Accord•9mo ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ Json Deserialiser throws NullReferenceException when deserializing an array