CODEWITHSUNDEEP
c#.netjsonserializationdeserialization
Bmoe
Bmoe

Reputation: 978

Convert Key-Value Pair String to .NET Object

I have a json string like so (there are many properties but just including few values): [{"Key":"ID","Value":"123"},{"Key":"Status","Value":"New"},{"Key":"Team","Value":"South"}]

I have a class representing the values

    public class CustomObject
        {
            public string ID { get; set; }
            public string Status { get; set; }
            public string Team { get; set; }
//Other props

        }

So even though the JSON is an array of these objects containing Key:x, Value:y, the whole structure is really just an instance of my CustomObject class. This is the way the json is given to me. How can I convert this to a type of CustomObject?

Upvotes: 1

Views: 1588

Answers (1)

Jawad
Jawad

Reputation: 11364

You can do something like this. Create a new class that deserializes the JSON you get to a class of KeyValue pairs. Then take the values from this class based on the Keys you are interested in.


public class CustomObject
{
    public CustomObject() { }

    public CustomObject(List<KeyValueClass> jsonObject) // Use of Reflection here
    {
        foreach (var prop in typeof(CustomObject).GetProperties())
        {
            prop.SetValue(this, jsonObject.FirstOrDefault(x => x.Key.Equals(prop.Name))?.Value, null);
        }
    }

    public string ID { get; set; }
    public string Status { get; set; }
    public string Team { get; set; }

}

public class KeyValueClass
{
    [JsonProperty("Key")]
    public string Key { get; set; }

    [JsonProperty("value")]
    public string Value { get; set; }
}

and following is how you'd deserialize it.


var obj = JsonConvert.DeserializeObject<List<KeyValueClass>>(json);
var customObj = new CustomObject()
{
    ID = obj.FirstOrDefault(x => x.Key.Equals("ID"))?.Value,
    Status = obj.FirstOrDefault(x => x.Key.Equals("Status"))?.Value,
    Team = obj.FirstOrDefault(x => x.Key.Equals("Team"))?.Value
};

var customObj2 = new CustomObject(obj); // Using constructor to build your object.

Note: Based on convention, you should use UpperCase first letter for the variable names in the class. Use of JsonProperty helps in conforming to that standard.

Upvotes: 1

Related Questions