C#•2y ago

❔ Json Deserialiser throws NullReferenceException when deserializing an array

36 Replies

FypurOP•2y 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•2y 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

FypurOP•2y ago

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

Angius•2y ago

If they're enums, they should serialize fine

FypurOP•2y ago

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

Angius•2y ago

How are you serializing it?

FypurOP•2y 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•2y ago

Well You're serializing them empty Ah, wait

FypurOP•2y ago

well it should work still

Angius•2y ago

Yeah

TheRanger•2y ago

are Keys, MouseButton and Buttons enum?

FypurOP•2y 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•2y 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•2y ago

It works

FypurOP•2y ago

huhh

Angius•2y ago

Maybe because it's a struct...?

TheRanger•2y ago

works here

MODiX•2y 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•2y ago

Yeah nah, works with a struct

FypurOP•2y ago

It's all enums

FypurOP•2y ago

This is the constructor

TheRanger•2y ago

Monogame?

FypurOP•2y ago

yup The Control class is a custom one I made

TheRanger•2y ago

i have monogame, i can test

FypurOP•2y ago

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

TheRanger•2y ago

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

FypurOP•2y ago

Custom enum

FypurOP•2y ago

bruh I just updated dotnet And now it works

FypurOP•2y ago

TheRanger•2y ago

yeah i just ran it right now and it works

FypurOP•2y 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•2y ago

weird

FypurOP•2y ago

yea Ig the small patches do matter

Accord•2y 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

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