How to Deserialize JSON with Dynamic Keys into a C# Object Using Json.NET?

Handling dynamic key JSON deserialization in C#

When receiving a JSON response with dynamic keys, deserializing it into a C# object with a predefined data model can be tricky. This article discusses a specific scenario where the JSON response contains objects with dynamic keys.

The following JSON response illustrates the problem:

<code>{
"nasdaq_imbalance": 
{
    "name": "nasdaq_imbalance", 
    "group": "Market Data", 
    "description": null
},
"DXOpen IM": 
{
    "name": "DXOpen IM", 
    "group": "Daily",
    "description": null
}, 
"Float Shares": 
{
    "name": "Float Shares", 
    "group": "Daily", 
    "description": null
}, 
}</code>

The goal is to deserialize this JSON into a list of Dataset objects with name, group, and description properties.

Solution: Use Json.NET and dictionary

Json.NET provides a solution for deserializing JSON with dynamic keys to C# objects. By using JsonConvert.DeserializeObject<Dictionary<string, Dataset>>(json) you can deserialize JSON into a dictionary where the keys are dynamic keys from the JSON response and the values ​​are Dataset objects.

The following code demonstrates this solution:

<code class="language-csharp">using Newtonsoft.Json;

...

// 将JSON反序列化到一个包含动态键和Dataset对象的字典中
var json = @"{
""nasdaq_imbalance"": 
{
    ""name"": ""nasdaq_imbalance"", 
    ""group"": ""Market Data"", 
    ""description"": null
},
""DXOpen IM"": 
{
    ""name"": ""DXOpen IM"", 
    ""group"": ""Daily"",
    ""description"": null
}, 
""Float Shares"": 
{
    ""name"": ""Float Shares"", 
    ""group"": ""Daily"", 
    ""description"": null
}, 
}";
var datasetDictionary = JsonConvert.DeserializeObject<Dictionary<string, Dataset>>(json);

// 使用动态键作为字典键访问Dataset对象
foreach (var dataset in datasetDictionary.Values)
{
    Console.WriteLine($"Dataset: {dataset.name}, Group: {dataset.group}, Description: {dataset.description}");
}</code>

This solution allows you to deserialize JSON with dynamic keys to a C# object while preserving the original key-value structure.

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