使用json.net 组件 生成JSON字符串，自定义日期格式

public static string ToJson(object obj,bool formatjson)
{
StringBuilder sb = new StringBuilder();
StringWriter sw = new StringWriter(sb);

IsoDateTimeConverter idtc = new IsoDateTimeConverter();
idtc.DateTimeFormat = "yyyy-MM-dd hh:mm:ss";

JsonSerializer serializer = new JsonSerializer();
serializer.Converters.Add(idtc);
JsonWriter jw = new JsonTextWriter(sw);

if (formatjson)
{
jw.Formatting = Formatting.Indented;
}

serializer.Serialize(jw, obj);

return sb.ToString();
}