JsonHelper（C#）

最新推荐文章于 2022-09-29 11:33:04 发布

转载最新推荐文章于 2022-09-29 11:33:04 发布 · 1.1k 阅读

本文介绍了一个实用的JSON帮助类，提供了对象序列化、反序列化、数组解析等功能，并展示了如何使用这些方法来处理JSON数据。

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/// <summary>
    /// Json帮助类
    /// </summary>
    public static class JsonHelper
    {
        /// <summary>
        /// 将对象序列化为JSON格式
        /// </summary>
        /// <param name="o">对象</param>
        /// <returns>json字符串</returns>
        public static string ToJson(this object o)
        {
            string json = JsonConvert.SerializeObject(o);
            return json;
        }

        /// <summary>
        /// 解析JSON字符串生成对象实体
        /// </summary>
        /// <typeparam name="T">对象类型</typeparam>
        /// <param name="json">json字符串(eg.{"ID":"112","Name":"石子儿"})</param>
        /// <returns>对象实体</returns>
        public static T JsonToObject<T>(this string json) where T : class
        {
            JsonSerializer serializer = new JsonSerializer();
            StringReader sr = new StringReader(json);
            object o = serializer.Deserialize(new JsonTextReader(sr), typeof(T));
            T t = o as T;
            return t;
        }

        /// <summary>
        /// 解析JSON数组生成对象实体集合
        /// </summary>
        /// <typeparam name="T">对象类型</typeparam>
        /// <param name="json">json数组字符串(eg.[{"ID":"112","Name":"石子儿"}])</param>
        /// <returns>对象实体集合</returns>
        public static List<T> JsonToList<T>(this string json) where T : class
        {
            JsonSerializer serializer = new JsonSerializer();
            StringReader sr = new StringReader(json);
            object o = serializer.Deserialize(new JsonTextReader(sr), typeof(List<T>));
            List<T> list = o as List<T>;
            return list;
        }

        /// <summary>
        /// 反序列化JSON到给定的匿名对象.
        /// </summary>
        /// <typeparam name="T">匿名对象类型</typeparam>
        /// <param name="json">json字符串</param>
        /// <param name="anonymousTypeObject">匿名对象</param>
        /// <returns>匿名对象</returns>
        public static T DeserializeAnonymousType<T>(string json, T anonymousTypeObject)
        {
            T t = JsonConvert.DeserializeAnonymousType(json, anonymousTypeObject);
            return t;
        }

        /// <summary>
        /// 获取JSON格式的值，只支持.NET3.5+
        /// </summary>
        /// <param name="input">JSON文本</param>
        /// <param name="getkey">已知的KEY</param>
        /// <returns>获取已知KEY的值</returns>
        public static string getJsonval(string input, string key)
        {
            if (string.IsNullOrEmpty(input) || string.IsNullOrEmpty(key)) return string.Empty;
            JsonSerializer serializer = new JsonSerializer();
            StringReader sr = new StringReader(input);
            Dictionary<string, object> json = serializer.Deserialize(new JsonTextReader(sr), typeof(Dictionary<string, object>)) as Dictionary<string, object>;
            object value;
            json.TryGetValue(key, out value);
            return value as string;
        }
    }