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How to Deserialize a JSON Array of Mixed Data into Strongly Typed C# Classes?
How to Deserialize a JSON Array of Mixed Data into Strongly Typed C# Classes?
Jan 24, 2025 am 04:06 AM
This article demonstrates how to deserialize a JSON array containing mixed data types into strongly-typed C# classes. The challenge lies in the inconsistent schema of the JSON, where a dictionary's values are arrays of unnamed elements.
The example JSON looks like this:
{
"timestamp": 1473730993,
"total_players": 945,
"max_score": 8961474,
"players": {
"Player1Username": [
121,
"somestring",
679900,
5,
4497,
"anotherString",
"thirdString",
"fourthString",
123,
22,
"YetAnotherString"],
"Player2Username": [
886,
"stillAstring",
1677,
1,
9876,
"alwaysAstring",
"thirdString",
"fourthString",
876,
77,
"string"]
}
}
The solution uses Newtonsoft.Json and a custom converter, ObjectToArrayConverter<T>, to map the unnamed array elements to properties in a Player class. The JsonProperty attribute with the Order parameter is crucial for correctly mapping array elements to class properties based on their position.
Here's a simplified representation of the key classes:
Player Class:
[JsonConverter(typeof(ObjectToArrayConverter<Player>))]
public class Player
{
[JsonProperty(Order = 1)]
public int UniqueID { get; set; }
[JsonProperty(Order = 2)]
public string PlayerDescription { get; set; }
// ... other properties ...
}
The ObjectToArrayConverter<T> class (implementation omitted for brevity) handles the conversion logic. The root object, ScoreboardResults, is defined to hold the entire JSON structure:
ScoreboardResults Class:
public class ScoreboardResults
{
public int timestamp { get; set; }
public int total_players { get; set; }
public int max_score { get; set; }
public Dictionary<string, Player> players { get; set; }
}
Alternatively, DataContract and DataMember attributes can achieve similar results by specifying the order of properties. The article suggests exploring demo fiddles (links not included here) for complete code examples. This approach effectively handles the deserialization of complex, inconsistently structured JSON data into strongly-typed C# objects.
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