Common/JsonHelper.cs

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using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.IO;

namespace Common
{
    /// <summary>
    /// Josn操作
    /// </summary>
    public class JsonHelper
    {
        /// <summary>
        /// 将对象序列化为Json格式
        /// </summary>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static string SerializeObject(object obj)
        {
            return JsonConvert.SerializeObject(obj);
        }

        /// <summary>
        /// 根据KEY获取json的值
        /// </summary>
        /// <param name="jsonstr">json字符串</param>
        /// <param name="key">键</param>
        /// <returns></returns>
        public static string JsonToString(object jsonstr, string key)
        {
            try
            {
                JObject jo = (JObject)JsonConvert.DeserializeObject(jsonstr.ToString());
                return jo[key].ToString();
            }
            catch (Exception)
            {
                throw;
            }
        }

        /// <summary>
        /// 解析JSON字符串生成对象实体
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="jsonstr"></param>
        /// <returns></returns>
        public static T DeserializeJsonToObject<T>(string jsonstr) where T : class
        {
            JsonSerializer serializer = new JsonSerializer();
            StringReader sr = new StringReader(jsonstr);
            object obj = serializer.Deserialize(new JsonTextReader(sr), typeof(T));
            return (T)obj;
        }

        /// <summary>
        /// 解析JSON数组生成对象实体集合
        /// </summary>
        /// <typeparam name="T"></typeparam>