Add ability to convert BinaryData into a dictionary or a dynamic type #113477
Labels
Milestone
Comments
|
Tagging subscribers to this area: @dotnet/area-system-text-json, @gregsdennis |
|
Tagging subscribers to this area: @dotnet/area-system-memory |
|
One option is to access content directly from JsonNode without making content copies, another option is to deserialize the JsonNode: using System;
using System.Text.Json;
using System.Text.Json.Nodes;
// <PackageReference Include="System.Memory.Data" Version="9.0.3" />
ReadOnlySpan<byte> json = """
{
"pets": [
{
"id": 1,
"name": "Buddy",
"type": "Dog",
"age": 5
},
{
"id": 2,
"name": "Mittens",
"type": "Cat",
"age": 3
}
],
"next": "https://api.example.com/pets?page=2"
}
"""u8;
BinaryData binaryData = new BinaryData(json.ToArray());
JsonNode? rootNode = JsonNode.Parse(binaryData.ToMemory().Span);
// optin 1: access JSON array via node
JsonArray? petsArray = rootNode?["pets"]?.AsArray();
if (petsArray is not null)
{
foreach (JsonNode? petNode in petsArray) Console.WriteLine(petNode);
}
// option 2: deserialize to concrete type
List<Pet>? pets = JsonSerializer.Deserialize<List<Pet>>(rootNode?["pets"]);
if (pets is not null)
{
foreach (var pet in pets) Console.WriteLine(pet);
}
file record Pet(int Id, string Name, string Type, int Age); |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
There are cases where you are dealing with a BinaryData instance which contains some data following a known JSON schema under a given property, e.g.
{ "pets": [ { "id": 1, "name": "Buddy", "type": "Dog", "age": 5 }, { "id": 2, "name": "Mittens", "type": "Cat", "age": 3 } ], "next": "https://api.example.com/pets?page=2" }I want to deserialize everything under "pets" into a
List<Pet>. There isn't a simple way to do this with the BinaryData API. In Azure, there is an extension method that allows you converting BinaryData to a dynamic type. There is also another extension method that allows converting to a dictionary of string, object here. Having this ability outside of Azure would be helpful.Ultimately, I'd like to be able to do this:
or how it would look with the Azure extension method:
As a workaround, I was able to use
JsonNode, but it feels like there is something missing from the BinaryData API:The text was updated successfully, but these errors were encountered: