How to read from JSON dynamic content into an object?

Question

I need to define in a json file bands containing a dynamic value ranges configuration. They might change in future, so I would like it to look like this:

"Bands": {
    "5-15": [ 5000, 15000 ],
    "15-30": [ 15000, 30000 ],
    "30-45": [ 30000, 45000 ],
    "45-60": [ 45000, 60000 ],
    "60-100": [ 60000, 100000 ]
}

Is it possible to read with this json format and store it in an object?

I tried this:

public class BandsMapping
{
    public List<Bands> Bands { get; set; }
}

public class Bands
{
    public string Name { get; set; }
    public List<int> ValueRanges { get; set; }
}

But it fails because there's no Name neither ValueRanges in the json file. But I would like the json file to look something like this.

Any idea on how can I achieve that?

I suspect you can deserialize the JSON for Bands into a Dictionary<string, int[]> and then convert it to the mapping you want. — Jon Skeet
– Jon Skeet, Commented Jun 17, 2020 at 11:42

Pavel Anikhouski · Accepted Answer · 2020-07-05 19:33:54Z

1

You can use Dictionary<string, List<int>> or Dictionary<string, int[]> for Bands content instead of just List<int>

public class BandsMapping
{
    public Dictionary<string, List<int>> Bands { get; set; }
}

Dictionary key represents a string with range, dictionary value is an array or list of integer values. You can also easily convert the dictionary into list of Bands items using Select method

var result = JsonConvert.DeserializeObject<BandsMapping>(jsonString);
var bandsList = result.Bands
    .Select(kvp => new Bands { Name = kvp.Key, ValueRanges = kvp.Value })
    .ToList();

edited Jul 5, 2020 at 19:33

answered Jun 17, 2020 at 11:46

Pavel Anikhouski

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2 Comments

Sonhja Over a year ago

It wasn't me! And it did work :) Thanks ^^ They are also downvoting my question and don't understand the reason...

Drag and Drop Over a year ago

I swear I thougth this was an old post. Exact same type of dupe exact same comment.

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