JSON Library for C#

JSON library for C#

JSON.Net

Easy to use strongly-typed JSON library for C#

http://james.newtonking.com/projects/json-net.aspx is the usual answer but there are many more.

        List<string> names = new List<string>() {"Mike","Joe","Jane"};
        Dictionary<string, int> ids = new Dictionary<string, int>()
                                          {
                                              {"Mike",1},
                                              {"Joe",2},
                                              {"Jane",3},
                                          };

        // ["Mike","Joe","Jane"]
        string nameJson = Newtonsoft.Json.JsonConvert.SerializeObject(names);

        //{"Mike":1,"Joe":2,"Jane":3}
        string idsJSon = Newtonsoft.Json.JsonConvert.SerializeObject(ids);

How to parse JSON without JSON.NET library?

You can use the classes found in the System.Json Namespace which were added in .NET 4.5. You need to add a reference to the System.Runtime.Serialization assembly

The JsonValue.Parse() Method parses JSON text and returns a JsonValue:

JsonValue value = JsonValue.Parse(@"{ ""name"":""Prince Charming"", ...");

If you pass a string with a JSON object, you should be able to cast the value to a JsonObject:

using System.Json;

JsonObject result = value as JsonObject;

Console.WriteLine("Name .... {0}", (string)result["name"]);
Console.WriteLine("Artist .. {0}", (string)result["artist"]);
Console.WriteLine("Genre ... {0}", (string)result["genre"]);
Console.WriteLine("Album ... {0}", (string)result["album"]);

The classes are quite similar to those found in the System.Xml.Linq Namespace.

C# library for converting json schema to sample JSON

Ok, it is super simplistic and doesn't take into account many factors of JSON schema, but it might be a good enough starting point for you. It also depends on the JsonSchema library from Newtonsoft.

   public class JsonSchemaSampleGenerator
    {
        public JsonSchemaSampleGenerator()
        {
        }

        public static JToken Generate(JsonSchema schema)
        {
            JToken output;
            switch (schema.Type)
            {
                case JsonSchemaType.Object:
                    var jObject = new JObject();
                    if (schema.Properties != null)
                    {
                        foreach (var prop in schema.Properties)
                        {
                            jObject.Add(TranslateNameToJson(prop.Key), Generate(prop.Value));
                        }
                    }
                    output = jObject;
                    break;
                case JsonSchemaType.Array:
                    var jArray = new JArray();
                    foreach (var item in schema.Items)
                    {
                        jArray.Add(Generate(item));
                    }
                    output = jArray;
                    break;

                case JsonSchemaType.String:
                    output = new JValue("sample");
                    break;
                case JsonSchemaType.Float:
                    output = new JValue(1.0);
                    break;
                case JsonSchemaType.Integer:
                    output = new JValue(1);
                    break;
                case JsonSchemaType.Boolean:
                    output = new JValue(false);
                    break;
                case JsonSchemaType.Null:
                    output = JValue.CreateNull();
                    break;

                default:
                    output = null;
                    break;

            }

            return output;
        }

        public static string TranslateNameToJson(string name)
        {
            return name.Substring(0, 1).ToLower() + name.Substring(1);
        }
    }

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