How to obtain a list of dynamic object keys/values from NewtonSoft Deserialised into Dynamic var-CodePudding

I have a C# class that receives a JSON string, and deserialises it into a dynamic.

json = @"{  
    "Id": "97dc4a96-43cf-48bd-9358-8f33e910594e",  
    "RepId": 90037,  
    "Something": true, 
    "SomethingElse": "abcdefg",
    "Thing_1_of_MaybeDozens": 55
}";

dynamic jsonData = JsonConvert.DeserializeObject(json);

I can't deserialse into a class because while each JSON string will always have two known data elements (Id, and RepId), the rest of the string may have many elements that I do not know ahead of time their names, or how many of them there are.

I can always ask for jsonData.Id, or jsonData.RepId, but I do not know how many other elements there may be, nor how to refer to them.

I need something similar to JavaScript's Object.Keys(myObject).

Anyone knows how to do similar in C# with a Newtonsoft Deserialised JSON string?

CodePudding user response：

You can use Reflection:

public Dictionary<string, object> DynamicToDictionary(dynamic obj)
{
     var dict = new Dictionary<string, object>();
     foreach (PropertyDescriptor pd in TypeDescriptor.GetProperties(obj))
     {
        object obj2 = propertyDescriptor.GetValue(obj);
        dict.Add(propertyDescriptor.Name, obj2);
     }
     return dict;
}

Now you may use the dictionary's TryGetValue(), and ContainsKey().

CodePudding user response：

try to use Newtonsoft.Json extensions

var data = JsonConvert.DeserializeObject<Data>(json);

list of keys

List<string> additionalKeys=data.AdditionalData.Select(ad => ad.Key).ToList();

output

["Something","SomethingElse","Thing_1_of_MaybeDozens"]

how to use

var id = data.Id;  //97dc4a96-43cf-48bd-9358-8f33e910594e

var somethingElse = data.AdditionalData["SomethingElse"]; // abcdefg

class

public class Data
{
    // normal deserialization
    public string Id { get; set; }
    public long RepId { get; set; }

    //additional data
    [JsonExtensionData]
    public Dictionary<string, object> AdditionalData {get;set;}
}