C#像JS一样操作JSON

DynamicJson

dynamic json structure for C# 4.0.

Info

Archive, import from Codeplex.

Features

• Intuitive operation by "dynamic".
• This library is only 1 class and written in 400 lines.
• Available in NuGet DynamicJson

Read and Access

// Parse (from JsonString to DynamicJson)
var json = DynamicJson.Parse(@"{""foo"":""json"", ""bar"":100, ""nest"":{ ""foobar"":true } }");

var r1 = json.foo; // "json" - dynamic(string)
var r2 = json.bar; // 100 - dynamic(double)
var r3 = json.nest.foobar; // true - dynamic(bool)
var r4 = json["nest"]["foobar"]; // can access indexer

Operate

var json = DynamicJson.Parse(@"{""foo"":""json"", ""bar"":100, ""nest"":{ ""foobar"":true } }");

// Check Defined Peroperty
// .name() is shortcut of IsDefined("name")
var b1_1 = json.IsDefined("foo"); // true
var b2_1 = json.IsDefined("foooo"); // false
var b1_2 = json.foo(); // true            
var b2_2 = json.foooo(); // false;

// Add
json.Arr = new string[] { "NOR", "XOR" }; // Add Array
json.Obj1 = new { }; // Add Object
json.Obj2 = new { foo = "abc", bar = 100 }; // Add and Init

// Delete
// ("name") is shortcut of Delete("name")
json.Delete("foo");
json.Arr.Delete(0);
json("bar");
json.Arr(1);

// Replace
json.Obj1 = 5000;

// Create New JsonObject
dynamic newjson = new DynamicJson();
newjson.str = "aaa";
newjson.obj = new { foo = "bar" };

// Serialize(to JSON String)
var jsonstring = newjson.ToString(); // {"str":"aaa","obj":{"foo":"bar"}}

Enumerate

// DynamicJson - (IsArray)
var arrayJson = DynamicJson.Parse(@"[1,10,200,300]");
foreach (int item in arrayJson)
{
    Console.WriteLine(item); // 1, 10, 200, 300
}

// DynamicJson - (IsObject)
var objectJson = DynamicJson.Parse(@"{""foo"":""json"",""bar"":100}");
foreach (KeyValuePair item in objectJson)
{
    Console.WriteLine(item.Key + ":" + item.Value); // foo:json, bar:100
}

Convert/Deserialize

public class FooBar
{
    public string foo { get; set; }
    public int bar { get; set; }
}

var arrayJson = DynamicJson.Parse(@"[1,10,200,300]");
var objectJson = DynamicJson.Parse(@"{""foo"":""json"",""bar"":100}");

// (type) is shortcut of Deserialize()
var array1 = arrayJson.Deserialize();
var array2 = (int[])arrayJson; // equals array1
int[] array3 = arrayJson; // equals array2

// mapping by public property name
var foobar1 = objectJson.Deserialize();
var foobar2 = (FooBar)objectJson;
FooBar foobar3 = objectJson;

// with linq
var objectJsonList = DynamicJson.Parse(@"[{""bar"":50},{""bar"":100}]");
var barSum = ((FooBar[])objectJsonList).Select(fb => fb.bar).Sum(); // 150
var dynamicWithLinq = ((dynamic[])objectJsonList).Select(d => d.bar);

Serialize (to JSON String from Object)

// Serialize (from Object to JsonString)
var obj = new
{
    Name = "Foo",
    Age = 30,
    Address = new
    {
        Country = "Japan",
        City = "Tokyo"
    },
    Like = new[] { "Microsoft", "Xbox" }
};
// {"Name":"Foo","Age":30,"Address":{"Country":"Japan","City":"Tokyo"},"Like":["Microsoft","Xbox"]}
var jsonStringFromObj = DynamicJson.Serialize(obj);

// [{"foo":"fooooo!","bar":1000},{"foo":"orz","bar":10}]
var foobar = new FooBar[] { 
        new FooBar { foo = "fooooo!", bar = 1000 }, 
        new FooBar { foo = "orz", bar = 10 } };
var jsonFoobar = DynamicJson.Serialize(foobar);

Notice: corner case

var nestJson = DynamicJson.Parse(@"{""tes"":10,""nest"":{""a"":0}");

nestJson.nest(); // This equals json.IsDefined("nest")
nestJson.nest("a"); // This equals json.nest.Delete("a")

// if name is C#'s reserved word then put prefix "@"
var json = DynamicJson.Parse(@"{""int"":10,""event"":null}");
var r1 = json.@int; // 10.0
var r2 = json.@event; // null

Example : TwitterAPI

static void Main()
{
    var publicTL = new WebClient().DownloadString(@"http://twitter.com/statuses/public_timeline.json");
    var statuses = DynamicJson.Parse(publicTL);
    foreach (var status in statuses)
    {
        Console.WriteLine(status.user.screen_name);
        Console.WriteLine(status.text);
    }
}

Example : TwitterAPI2

static void Main(string[] args)
{
    // fetch and flatten user_timeline
    var wc = new WebClient();
    var statuses = Enumerable.Range(1, 5)
        .Select(i =>
            wc.DownloadString("http://twitter.com/statuses/user_timeline/neuecc.json?page=" + i))
        .SelectMany(s => (dynamic[])DynamicJson.Parse(s))
        .OrderBy(j => j.id);

    foreach (var status in statuses)
    {
        Console.WriteLine(status.text);
    }
}