/// <summary>
/// Tries to parse a string of json and determine is <see cref="JsonValue"/> type.
/// </summary>
/// <param name="json">A string of json that should be parsed.</param>
/// <param name="value">The output <see cref="JsonValue"/> created if successful. If not successful, a <see cref="JsonNull"/> se set to <paramref name="value"/>.</param>
/// <returns>Returns true if <see cref="JsonValue"/> was successfully created; otherwise false is returned.</returns>
public static bool TryParse(string json, out JsonValue value)
{
if (string.IsNullOrEmpty(json))
{
value = new JsonNull();
return true;
}
if (json.StartsWith("{", StringComparison.CurrentCulture) && json.EndsWith("}", StringComparison.Ordinal))
{
value = new JsonObject(json);
return true;
}
if (json.StartsWith("[") && json.EndsWith("]"))
{
value = new JsonArray(json);
return true;
}
if (json.StartsWith("\"") && json.EndsWith("\""))
{
json = json.Substring(1, json.Length - 2);
if (json.StartsWith("base64:"))
value = new JsonBinary(json);
else
value = new JsonString(json);
return true;
}
decimal v;
bool bv;
if (decimal.TryParse(json, out v))
{
value = new JsonNumber(v);
return true;
}
if (bool.TryParse(json, out bv))
{
value = new JsonBoolean(bv);
return true;
}
value = null;
return false;
}
/// <summary>
/// Creates a new instance of the specified type, provided by the constructor.
/// </summary>
/// <returns>Returns the newly created instance.</returns>
public object AddNew()
{
if (newPos != -1)
this.OnListChanged(ListChangedType.ItemAdded, newPos);
JsonValue newValue = null;
if (vtype == typeof(JsonString))
newValue = new JsonString();
else if (vtype == typeof(JsonNumber))
newValue = new JsonNumber();
else if (vtype == typeof(JsonBoolean))
newValue = new JsonBoolean();
else if (vtype == typeof(JsonObject))
{
JsonObject obj = new JsonObject();
foreach (PropertyDescriptor prop in props)
obj.Add(prop.Name, (JsonValue)Activator.CreateInstance(prop.PropertyType));
newValue = obj;
}
if (newValue != null)
{
newPos = List.Add(newValue);
this.Position = newPos;
}
return newValue;
}