Exception while accessing into flattened json object

I’m trying to access flattened json object by using json path:

using ChoETL;
using System.Linq;
using System.Collections;
using System.Collections.Generic;

public class Program
{
	public static void Main()
	{
		typeof(ChoJSONReader).GetAssemblyVersion().Print();
		"".Print();
		
		string json = @"{
  ""BrandId"": ""998877665544332211"",
  ""Categories"": [ ""112233445566778899"" ],
  ""Contact"": {
    ""Phone"": [
      {
        ""Value"": ""12346789"",
        ""Description"": { ""vi"": ""Phone"" },
        ""Type"": 1
      }
    ]
  }
}";
		using (var r = ChoJSONReader.LoadText(json)
			   .Configure(c => c.DefaultArrayHandling = false)
			   .Configure(c => c.FlattenNode = true)
			   .Configure(c => c.UseNestedKeyFormat = true)
			   .Configure(c => c.FlattenByNodeName = "Contact.Phone")
			   .Configure(c => c.NestedKeySeparator = '.')
			   .Configure(c => c.NestedColumnSeparator = '.')
			  )
		{
			//var dt = r.AsDataTable();
			//dt.DumpAsJson().Print();
			var a = r.WithField("Phone","$.[\"Contact.Phone.Value\"]");
			a.Print();
			
		}

	}
}

After running this code, it’s return this output:

ChoETL.JSON.Core v1.2.1.45

[
  [ ]
]

Expected output:

[
"12346789"
]

I’m using ChoETL.JSON.Core v1.2.1.45 beta1 https://dotnetfiddle.net/WJHC2P @Cinchoo

[zhenyuan0502]

I understand what you have done. But when I access to ""Description"": { ""vi"": ""Phone"" } by using

var a = r.WithField("Phone","$.[\'Contact.Phone.Description.vi\']", isArray: false);

it’s return null value @Cinchoo https://dotnetfiddle.net/1fGp7O

Because it was a key separator, if you change . to _ as .Configure(c => c.NestedKeySeparator = '_'), you don’t need to wrapper by brackets, so it is just simply var a = r.WithField("Phone","$.Contact_Phone_Description.vi", isArray: false);

[Cinchoo]

jsonpath contains special character, hence must be given in $.['valid.key.with.dot'] format.

Valid field spec

var a = r.WithField("Phone","$.[\'Contact.Phone.Value\']", isArray: false);

Sample fiddle: https://dotnetfiddle.net/B1BkFi