I'm looking for an example code/lib to decode a JSON string using C#.
To encode I can do this:
var data = new Dictionary<string,string>();
data.Add("..", "...");
var json_encoded = new JavaScriptSerializer().Serialize(data);
but how do I decode?
var json_decoded = ??
You can do this:
var data = new Dictionary<string, string>();
data.Add("foo", "baa");
JavaScriptSerializer ser = new JavaScriptSerializer();
var JSONString = ser.Serialize(data); //JSON encoded
var JSONObj = ser.Deserialize<Dictionary<string, string>>(JSONString); //JSON decoded
Console.Write(JSONObj["foo"]); //prints: baa
This will take JSON and convert it to a strongly typed class of which you specify (T)
public static T Deserialize<T>(string json)
{
var obj = Activator.CreateInstance<T>();
using(var ms = new MemoryStream(Encoding.Unicode.GetBytes(json)))
{
var serializer = new DataContractJsonSerializer(obj.GetType());
obj = (T) serializer.ReadObject(ms);
return obj;
}
}
This will take a class and serialize it as JSON
public static string Serialize<T>(T obj)
{
var serializer = new DataContractJsonSerializer(obj.GetType());
using (var ms = new MemoryStream())
{
serializer.WriteObject(ms, obj);
return Encoding.Default.GetString(ms.ToArray());
}
}
Note: In the first example you will need to have a backing class to specify what type T is. So if you told it that T is of type User you would need to have this specified somewhere:
public class User
{
public string Username { get; set; }
public string Firstname { get; set; }
}
DataContractJsonSerializer object (per serialisable type) instead of constructing a new one for each serialisation?