C# 将json字符串转换为键值对形式，用于执行form表单形式的请求

需要添加引用：

System.Web

System.Web.Extensions

需要引入命名空间：

using System.Collections.Generic;

using System.Web;

using System.Web.Script.Serialization;

 

string KeyValueCombination(string str)
        {
            string paraUrlCoded = "";
            JavaScriptSerializer serializer = new JavaScriptSerializer();
            Dictionary<string, object> json = (Dictionary<string, object>)serializer.DeserializeObject(str);
            foreach (var j in json)
            {
                paraUrlCoded += System.Web.HttpUtility.UrlEncode(j.Key);
                if (j.Value.GetType() == typeof(object[]))
                {
                    paraUrlCoded += "=" + System.Web.HttpUtility.UrlEncode(jss.Serialize(j.Value)) + "&";
                }
                else
                {
                    paraUrlCoded += "=" + System.Web.HttpUtility.UrlEncode(j.Value.ToString()) + "&";
                }
            }


            if (!string.IsNullOrWhiteSpace(paraUrlCoded))
            {
                paraUrlCoded = paraUrlCoded.Substring(0, paraUrlCoded.Length - 1);
            }


            return paraUrlCoded;
        }