How Can I Parse a Stream of Concatenated JSON Objects into an IEnumerable Collection Using JSON.NET?

Efficiently Parsing Concatenated JSON Objects using JSON.NET

JSON.NET offers robust tools for handling JSON data. This guide focuses on parsing a stream of concatenated JSON objects into an IEnumerable collection.

The core strategy involves using a JsonSerializer with CheckAdditionalContent set to false, allowing for multiple object parsing. The stream is wrapped in a StreamReader, feeding a JsonTextReader for JSON data ingestion.

To process the continuous stream, setting SupportMultipleContent to true is critical. A common pitfall is failing to properly advance the reader after deserialization. The solution lies in a carefully structured loop:

while (jsonReader.Read())
{
    yield return serializer.Deserialize<TResult>(jsonReader);
}

This loop ensures each JSON object is read and deserialized into a TResult object, efficiently yielding each object within the IEnumerable collection.

Crucially, remember that the IEnumerable should be iterated while the stream remains open. The following example illustrates this:

using (var stream = /* your stream */)
{
    IEnumerable<MyClass> result = ReadJson<MyClass>(stream);

    foreach (var item in result)
    {
        Console.WriteLine(item.MyProperty);
    }
}

For detailed information and further examples, refer to the following resources:

• JSON.NET Documentation on Reading Multiple Fragments: https://www.newtonsoft.com/json/help/html/JsonReader.htm#TocPath__JsonTextReader_SupportMultipleContent_2
• DotNetFiddle Example: https://www.php.cn/link/b0a3f2a0d6f86051e6ab6c49d6d99e75

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