(C# UWP/WinRT) JSON: Miscellaneous Operations

Demonstrates a variety of JSON API methods. This example uses the following JSON document:

{
   "alphabet": "abcdefghijklmnopqrstuvwxyz",
   "sampleData" : {
           "pi": 3.14,
	   "apple": "juicy",
	   "hungry": true,
	   "withoutValue": null,
           "answer": 42
          
	}
}

Chilkat Universal Windows Platform (UWP) / WinRT Downloads Chilkat for the Universal Windows Platform (UWP)

Chilkat.JsonObject json = new Chilkat.JsonObject();
json.EmitCompact = false;

// Assume the file contains the data as shown above..
bool success = json.LoadFile("qa_data/json/sample2.json");
if (success != true) {
    Debug.WriteLine(json.LastErrorText);
    return;
}

// First navigate to the "sampleData" object:
Chilkat.JsonObject sampleData = json.ObjectOf("sampleData");

// Demonstrate BoolAt and BoolOf
Debug.WriteLine("hungry: " + Convert.ToString(sampleData.BoolOf("hungry")));
Debug.WriteLine("hungry: " + Convert.ToString(sampleData.BoolAt(2)));

// StringOf returns the value as a string regardless of it's actual type:
Debug.WriteLine("pi: " + sampleData.StringOf("pi"));
Debug.WriteLine("answer: " + sampleData.StringOf("answer"));
Debug.WriteLine("withoutValue: " + sampleData.StringOf("withoutValue"));
Debug.WriteLine("hungry: " + sampleData.StringOf("hungry"));

// Demonstrate IsNullOf / IsNullAt
Debug.WriteLine("withoutValue is null? " + Convert.ToString(sampleData.IsNullOf("withoutValue")));
Debug.WriteLine("withoutValue is null? " + Convert.ToString(sampleData.IsNullAt(3)));
Debug.WriteLine("apple is null? " + Convert.ToString(sampleData.IsNullOf("apple")));
Debug.WriteLine("apple is null? " + Convert.ToString(sampleData.IsNullAt(1)));

// IntOf
Debug.WriteLine("answer: " + Convert.ToString(sampleData.IntOf("answer")));

// SetNullAt, SetNullOf
// Set "pi" to null
success = sampleData.SetNullAt(0);
// Set "answer" to null
success = sampleData.SetNullOf("answer");

// Show the changes:
Debug.WriteLine(json.Emit());

// Restore pi and apple:
success = sampleData.SetNumberAt(0,"3.14");
success = sampleData.SetNumberOf("answer","42");

// Show the changes:
Debug.WriteLine(json.Emit());

// Add a null value named "afterApple" just after "apple"
success = sampleData.AddNullAt(2,"afterApple");

// Add a boolean value just after "pi"
success = sampleData.AddBoolAt(1,"afterPi",false);

// Examine the changes..
Debug.WriteLine(json.Emit());