Purse dynamic JSON with C#

First, let me explain what is we are trying to do in this post. Recently have a problem needed to parse a JSON to a C# object. Few of the fields are fixed whereas few are dynamic in nature. Like in the following JSON-

 
{
  "text": "TestallDay",
  "description": null,
  "recurrenceRule": null,
  "id": 238,
  "recurrenceException": null,
  "allDay": true,
  "startDate": "2020-07-07T05:00:00Z",
  "endDate": "2020-07-08T05:00:00Z",
  "resourceTypeId_52": [
    134
  ],
  "resourceTypeId_49": [
    118,
    124
  ]
}

There can be multiple such properties with resourceTypeId_* where * is a number and these properties contain an array of integers. Here is how we can solve this in one possible way. Declared a class like below-

 
    public class DataModel
    {
        [JsonProperty("text")]
        public string Text { get; set; }

        [JsonProperty("description")]
        public object Description { get; set; }

        [JsonProperty("recurrenceRule")]
        public object RecurrenceRule { get; set; }
        
        [JsonProperty("Id")]
        public int Id { get; set; }
        
        [JsonProperty("recurrenceException")]
        public object RecurrenceException { get; set; }
        
        [JsonProperty("allDay")]
        public bool AllDay { get; set; }
        
        [JsonProperty("startDate")]
        public DateTime StartDate { get; set; }
        
        [JsonProperty("endDate")]
        public DateTime EndDate { get; set; }
       
        [JsonProperty("ResourceTypeIds")]
        public Dictionary<string, int[]> ResourceTypeIds { get; set; }
    }

Here in the class you can see we have a property of type Dictionary where we need to fill in all such properties. We can use normal JSON conversion (in my case used JsonConvert from Newtonsoft) for other properties and we can use Newtonsoft.Json.Linq.JProperty to loop through all such properties - resourceTypeId_34, resourceTypeId_45 etc and fill in the values in integer dictionary. Here is the code-

 
            string json = "{\"text\":\"TestallDay\",\"description\":null,\"recurrenceRule\":null,\"id\":238,\"recurrenceException\":null,\"allDay\":true,\"startDate\":\"2020-07-07T05:00:00Z\",\"endDate\":\"2020-07-08T05:00:00Z\",\"resourceTypeId_52\":[134],\"resourceTypeId_49\":[118,124]}";
            
            var data = JsonConvert.DeserializeObject<DataModel>(json);
            data.ResourceTypeIds = new Dictionary<string, int[]>();
            JObject item = JObject.Parse(json);

            IEnumerable<JProperty> props = item.Properties().Where(p => p.Name.Contains("resourceTypeId"));
            foreach (var prop in props)
            {
                List<int> arrayItems = new List<int>();
                foreach (var arrItem in prop.Value)
                {
                    arrayItems.Add((int)arrItem);
                }
                data.ResourceTypeIds.Add(prop.Name, arrayItems.ToArray());
            }

The output looks like this screenshot-

 
IEnumerable<JProperty> props = item.Properties().Where(p => p.Name.Contains("resourceTypeId"));
            foreach (var (prop, arrayItems) in from prop in props
                                               let arrayItems = (from arrItem in prop.Value
                                                                 select (int)arrItem).ToList()
                                               select (prop, arrayItems))
            {
                data.ResourceTypeIds.Add(prop.Name, arrayItems.ToArray());
            }

Complete source code can be found here