QuickJson

QuickJson is a very basic JSON parser, distributed as a source-only package that can be referenced without imposing any run-time dependencies.

Terms of use[?]

By using this project or its source code, for any purpose and in any shape or form, you grant your implicit agreement to all the following statements:

• You condemn Russia and its military aggression against Ukraine
• You recognize that Russia is an occupant that unlawfully invaded a sovereign state
• You support Ukraine's territorial integrity, including its claims over temporarily occupied territories of Crimea and Donbas
• You reject false narratives perpetuated by Russian state propaganda

To learn more about the war and how you can help, click here. Glory to Ukraine! 🇺🇦

Install

• 📦 NuGet: dotnet add package QuickJson

Warning: To use this package, your project needs to target C# 10 or later. You can ensure this by setting <LangVersion>latest</LangVersion> in the project file.

Usage

To parse a JSON string, call Json.TryParse(...) or Json.Parse(...):

// This returns null on invalid JSON
var json = Json.TryParse(
    """
    {
        "foo": [
            69,
            true,
            "bar"
        ]
    }
    """
);

// This throws on invalid JSON
var json = Json.Parse("...");

To retrieve a nested node in the parsed JSON, use [Try]GetChild(...):

// May return null if the property doesn't exist
// or if the referenced node is not an object
var foo = json.TryGetChild("foo");

// May return null if the child doesn't exist
// or if the referenced node is not an array
var child1 = foo?.TryGetChild(0);
var child2 = foo?.TryGetChild(1);
var child3 = foo?.TryGetChild(2);

Alternatively, you can also enumerate all object properties using EnumerateProperties() or all array children using EnumerateChildren():

// Returns an empty enumerator if the referenced node is not an object
foreach (var prop in json.EnumerateProperties())
{
    var name = prop.Name; // string
    var value = prop.Value; // JsonNode

    // ...
}

// Returns an empty enumerator if the referenced node is not an array
foreach (var child in json.EnumerateChildren())
{
    // ...
}

In order to extract values from nodes, use [Try]GetNumber(), [Try]GetBool(), or [Try]GetString():

// May return null if the node contains a value of a different kind
var value1 = child1?.TryGetNumber(); // double
var value2 = child2?.TryGetBool(); // bool
var value3 = child3?.TryGetString(); // string