vStationURM/Tools/DownloadImagesTool/ImageConvert/JsonHelper.cs

using System;
using System.IO;
using System.Text.Json;

namespace DownloadImagesTool
{
    /// <summary>
    /// This is a utilities class for json serializer and deserializer.
    /// </summary>
    public class JsonHelper
    {
        /// <summary>
        /// Deserializer from json result.
        /// </summary>
        /// <typeparam name="T">Type of object.</typeparam>
        /// <param name="jsonResult">Json string</param>
        /// <returns>Instance of T.</returns>
        public static T DeserializerJson<T>(string jsonResult, JsonSerializerOptions jsonSerializerOptions = null) where T : class
        {
            return JsonSerializer.Deserialize(jsonResult, typeof(T), jsonSerializerOptions) as T;
        }

        /// <summary>
        /// Deserializer from object result.
        /// </summary>
        /// <typeparam name="T">Type of object.</typeparam>
        /// <param name="jsonResult">Json string</param>
        /// <returns>Instance of T.</returns>
        public static T DeserializerObject<T>(object jsonObj, JsonSerializerOptions jsonSerializerOptions = null) where T : class
        {
            var jsonDoc = JsonDocument.Parse(SerializerToJson(jsonObj));
            return DeserializerJson<T>(jsonDoc.RootElement.GetRawText(), jsonSerializerOptions);
        }

        /// <summary>
        /// Serialize from instance to json string
        /// </summary>
        /// <typeparam name="T">Type of object.</typeparam>
        /// <param name="instance">Instance need to serialize.</param>
        /// <param name="useJsonFormatter"></param>
        /// <returns>The json string</returns>
        public static string SerializerToJson<T>(T instance, JsonSerializerOptions jsonSerializerOptions = null)
        {
            return JsonSerializer.Serialize(instance, jsonSerializerOptions);
        }

        /// <summary>
        /// Deserializer json to object with json file
        /// </summary>
        /// <typeparam name="T">Convert type</typeparam>
        /// <param name="jsonFilePath">Json file path</param>
        /// <returns></returns>
        public static T DeserializerJsonFile<T>(string jsonFilePath, JsonSerializerOptions jsonSerializerOptions = null) where T : class
        {
            try
            {
                using (var stream = new FileStream(jsonFilePath, FileMode.Open, FileAccess.Read, FileShare.Read))
                {
                    using (var sr = new StreamReader(stream))
                    {
                        return DeserializerJson<T>(sr.ReadToEnd(), jsonSerializerOptions);
                    }
                }
            }
            catch (Exception exception)
            {
                Console.WriteLine($"JsonHelper_DeserializerJsonFile error:{exception}");
                return default(T);
            }
        }
    }
}