Linq to json

添加引用：

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

操作json字符串方法

    /// <summary>
    /// linq操作json
    /// </summary>
    public void OpearteJson()
    {
        string jsonStr = "{"name":"小明","age":"20","phone":[{"type":"phone"},{"type":"huawei"}]}";
        var jsonObject = JObject.Parse(jsonStr);
        var name = jsonObject["name"].ToString();//根据对象key获取value
        var phoneArr = jsonObject["phone"] as JArray;//获取数组key键的值
        foreach (JObject item in phoneArr)//遍历json对象数组
        {
            foreach (var keyValue in item)//循环遍历json对象键值对
            {
                var key = keyValue.Key;
                var value = keyValue.Value.ToString();
            }
        }
    }

遍历json字符串的key value值:

/// <summary>
    /// 获取json字符串的键值对,不包含数组json
    /// </summary>
    /// <param name="jsonStr">json字符串,例如:"{"name":"szl","age":"20"}"</param>
    /// <returns></returns>
    public Dictionary<string, List<string>> GetJsonKeyValue(string jsonStr)
    {
        JObject jsonObj = JObject.Parse(jsonStr);//将json字符串转换成json对象
        Dictionary<string, List<string>> result = new Dictionary<string, List<string>>();
        List<string> key = new List<string>();
        List<string> value = new List<string>();
        foreach (var item in jsonObj)//遍历json对象的所有键值对
        {
            key.Add(item.Key);
            value.Add(item.Value.ToString());
        }
        result.Add("key", key);
        result.Add("value", value);
        return result;
    }