system.text.json

Convert object to System.Text.Json.JsonElement

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In .NET 6 methods are being added to JsonSerializer to serialize an object directly to a JsonElement or JsonDocument: public static partial class JsonSerializer { public static JsonDocument SerializeToDocument<TValue>(TValue value, JsonSerializerOptions? options = null); public static JsonDocument SerializeToDocument(object? value, Type inputType, JsonSerializerOptions? options = null); public static JsonDocument SerializeToDocument<TValue>(TValue value, JsonTypeInfo<TValue> jsonTypeInfo); public static JsonDocument … Read more

System.Text.Json – Deserialize nested object as string

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Found a right way how to correctly read the nested JSON object inside the JsonConverter. The complete solution is the following: public class SomeModel { public int Id { get; set; } public string Name { get; set; } [JsonConverter(typeof(InfoToStringConverter))] public string Info { get; set; } } public class InfoToStringConverter : JsonConverter<string> { public … Read more

Is there a built in way of using snake case as the naming policy for JSON in ASP.NET Core 3?

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Just slight modification in pfx code to remove the dependency on Newtonsoft Json.Net. String extension method to convert the given string to SnakeCase. public static class StringUtils { public static string ToSnakeCase(this string str) { return string.Concat(str.Select((x, i) => i > 0 && char.IsUpper(x) ? “_” + x.ToString() : x.ToString())).ToLower(); } } Then in our … Read more

Parsing a JSON file with .NET core 3.0/System.text.Json

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Update 2019-10-13: Rewritten the Utf8JsonStreamReader to use ReadOnlySequences internally, added wrapper for JsonSerializer.Deserialize method. I have created a wrapper around Utf8JsonReader for exactly this purpose: public ref struct Utf8JsonStreamReader { private readonly Stream _stream; private readonly int _bufferSize; private SequenceSegment? _firstSegment; private int _firstSegmentStartIndex; private SequenceSegment? _lastSegment; private int _lastSegmentEndIndex; private Utf8JsonReader _jsonReader; private bool … Read more

JsonConverter equivalent in using System.Text.Json

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System.Text.Json now supports custom type converters in .NET 3.0 preview-7 and above. You can add converters that match on type, and use the JsonConverter attribute to use a specific converter for a property. Here’s an example to convert between long and string (because javascript doesn’t support 64-bit integers). public class LongToStringConverter : JsonConverter<long> { public … Read more

JsonConverter equivalent in using System.Text.Json

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System.Text.Json now supports custom type converters in .NET 3.0 preview-7 and above. You can add converters that match on type, and use the JsonConverter attribute to use a specific converter for a property. Here’s an example to convert between long and string (because javascript doesn’t support 64-bit integers). public class LongToStringConverter : JsonConverter<long> { public … Read more

Ignore property when null using the new Net Core 3.0 Json

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I’m looking at .Net Core 3.1, where this should ignore null values services.AddControllers().AddJsonOptions(options => { options.JsonSerializerOptions.IgnoreNullValues = true; }); While in .NET 5 and later, set JsonSerializerOptions.DefaultIgnoreCondition to JsonIgnoreCondition.WhenWritingNull: services.AddControllers().AddJsonOptions(options => { options.JsonSerializerOptions.DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull; }); Note, the above isn’t per property/attribute, although there is an attribute which may be helpful JsonIgnoreAttribute. An alternative, to … Read more

Equivalent of JObject in System.Text.Json

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As of Nov 2021, .NET 6 introduces the System.Text.Json.Nodes namespace which: Provides types for handling an in-memory writeable document object model (DOM) for random access of the JSON elements within a structured view of the data The four new types are JsonArray, JsonObject, JsonNode and JsonValue. The closest type to JObject is JsonObject which offers … Read more

System.Text.Json: Deserialize JSON with automatic casting

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Edit: You can use JsonNumberHandlingAttribute and it handles everything correctly in 1 line, no need to write any code: [JsonNumberHandling(JsonNumberHandling.AllowReadingFromString)] public string Id { get; set; } …. Original answer: The new System.Text.Json api exposes a JsonConverter api which allows us to convert the type as we like. For example, we can create a generic … Read more