提取部分 JSON 内容（属性）并转换为 c# object？

Question

How to get part of json content and convert to c# object. API returning below JSON content. from that I need to get "ContentItems" part and convert to C# object. I already created the "ContentItems" Class.

I am using Newtonsoft.Json . It is hard to get to the part of it.

{
    "SubmissionId": 69,
    "SubmissionKey": "a1c78c25-b885-4ec0-8032-040fca6b447e",
    "CreatedUserId": 4,
    "ResourceType": "Article",
    "Files": [
       {
        "SubmissionFileId": 149,
        "FileName": "ARMA-81-0475.xml",
         "ContentItems": [
                {
                "ContentItemId": 132,
                "ContentKey": "8f8b2f74-ba29-4b7d-a44f-8d119dc2aab7",
                "SubmissionFile": null,                    
                }
           ]
        }
    ]
}

ContentItems.cs

public class ContentItems
{
    public int ContentItemId { get; set; }
    public string ContentKey { get; set; }
    public string SubmissionFile { get; set; }
}

Answer 1

Try this:

dynamic obj = JsonConvert.DeserializeObject(jsonContent);
var item = obj.Files[0].ContentItems[0].ToObject<ContentItems>();

Answer 2

Here is how you can extract just ContentItems from your JSON using JSONPath

var recs = JObject.Parse("*** JSON Text ***").SelectTokens("$..Files[*].ContentItems[*]")
    .Select(j => JsonConvert.DeserializeObject<ContentItems>(j.ToString()));

foreach (var rec in recs)
    Console.WriteLine(rec.ContentItemId);