Detect differences between two json files in c#

Question

For example, if I have the following json texts:

 object1{
     field1: value1;
     field2: value2;
     field3: value3;
 }

 object1{
     field1: value1;
         


        

Answer 1

I've constructed my own method for Json comparison. It uses Newtonsoft.Json.Linq.

    public static JObject FindDiff(this JToken Current, JToken Model)
    {
        var diff = new JObject();
        if (JToken.DeepEquals(Current, Model)) return diff;

        switch(Current.Type)
        {
            case JTokenType.Object:
                {
                    var current = Current as JObject;
                    var model = Model as JObject;
                    var addedKeys = current.Properties().Select(c => c.Name).Except(model.Properties().Select(c => c.Name));
                    var removedKeys = model.Properties().Select(c => c.Name).Except(current.Properties().Select(c => c.Name));
                    var unchangedKeys = current.Properties().Where(c => JToken.DeepEquals(c.Value, Model[c.Name])).Select(c => c.Name);
                    foreach (var k in addedKeys)
                    {
                        diff[k] = new JObject
                        {
                            ["+"] = Current[k]
                        };
                    }
                    foreach (var k in removedKeys)
                    {
                        diff[k] = new JObject
                        {
                            ["-"] = Model[k]
                        };
                    }
                    var potentiallyModifiedKeys = current.Properties().Select(c => c.Name).Except(addedKeys).Except(unchangedKeys);
                    foreach (var k in potentiallyModifiedKeys)
                    {
                        diff[k] = FindDiff(current[k], model[k]);
                    }
                }
                break;
            case JTokenType.Array:
                {
                    var current = Current as JArray;
                    var model = Model as JArray;
                    diff["+"] = new JArray(current.Except(model));
                    diff["-"] = new JArray(model.Except(current));
                }
                break;
            default:
                diff["+"] = Current;
                diff["-"] = Model;
                break;
        }

        return diff;
    }