How to Efficiently Read and Parse JSON Files in C#?

C# efficiently reads and parses JSON files

In C#, the process of reading and parsing JSON files can be simplified by using third-party libraries. It is recommended to use the Json.NET library.

Use the JsonTextReader class to read JSON files into an array. However, for large files, this approach may run into problems due to memory consumption.

A better way is to use the JsonConvert class in Json.NET:

using Newtonsoft.Json;

public void LoadJson()
{
    using (StreamReader r = new StreamReader("file.json"))
    {
        string json = r.ReadToEnd();
        List<Item> items = JsonConvert.DeserializeObject<List<Item>>(json);
    }
}

public class Item
{
    public int millis;
    public string stamp;
    public DateTime datetime;
    public string light;
    public float temp;
    public float vcc;
}

This code will deserialize a JSON string into a list of Item objects. The individual values ​​can then be accessed as needed.

For example, to extract a specific value without creating a custom class, you can use the following method:

dynamic array = JsonConvert.DeserializeObject(json);
foreach (var item in array)
{
    Console.WriteLine("{0} {1}", item.temp, item.vcc);
}

This dynamic approach provides a flexible way to handle specific properties of JSON objects without explicitly defining a class structure.

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