如何使用正则表达式规则从json数据响应中检索值？

Question

根据我从回复中收到的信息，我很难阅读我的正则表达式匹配项。 任何人都可以指导我正则表达式如何用于以下json格式？

 HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(url);
            myReq.ContentType = "application/json";

            // here's how to set response content type:
            Response.ContentType = "application/json"; // that's all

            var response = (HttpWebResponse)myReq.GetResponse();
            string text;

            using (var sr = new StreamReader(response.GetResponseStream()))
            {
                text = sr.ReadToEnd();
            }

            MatchCollection nameCollection = Regex.Matches(text, @"<_id>\s*(.+?)\s*</_id>", RegexOptions.Singleline);
            MatchCollection postalCollection = Regex.Matches(text, @"<postal_code>\s*(.+?)\s*</postal_code>", RegexOptions.Singleline)
            MatchCollection schoolCollection= Regex.Matches(text, @"<all_schools_2016>\s*(.+?)\s*</postal_code>,", RegexOptions.Singleline);

文本

{“帮助”：“ https://data.gov.sg/api/3/action/help_show?name=datastore_search ”，“成功”：true，“结果”：{“ resource_id”：“ 36e6b5fc-9acc-4344 -8f5f-5f67d52c525f“，”字段“：[{”类型“：” int4“，” id“：” _ id“}，{”类型“：”文本“，” id“：” all_schools_2016“}，{”类型“：” text“，” id“：”地址“}，{” type“：”数字“，” id“：” postal_code“}}，”记录“：[{” _id“：1，” postal_code“： “ 738907”，“ all_schools_2016”：“ ADMIRALTY小学”，“地址”：“ 11 WOODLANDS CIRCLE”}，{“ _id”：2，“邮政编码”：“ 737916”，“ all_schools_2016”：“ ADMIRALTY中学”， “ address”：“ 31 WOODLANDS CRESCENT”}，{“ _id”：3，“ postal_code”：“ 768643”，“ all_schools_2016”：“ AHMAD IBRAHIM小学”，“地址”：“ 10 YISHUN STREET 11”}，{ “ _id”：4，“邮政编码”：“ 768928”，“ all_schools_2016”：“ AHMAD IBRAHIM中学”，“地址”：“ 751 YISHUN AVENUE 7”}，{“ _ id”：5，“邮政编码”：“ 579646” “，” all_schools_2016“：” AI TONG SCHOOL“，”地址“：” 100 Bright Hill Drive“}}，” _links“：{”开始“：” / api / action / datastore_search？limit = 5＆re source_id = 36e6b5fc-9acc-4344-8f5f-5f67d52c525f“，” next“：” / api / action / datastore_search？offset = 5＆limit = 5＆resource_id = 36e6b5fc-9acc-4344-8f5f-5f67d52c525f“}，” limit“：5，”总计”：367}}

Answer 1

为什么要为此任务使用正则表达式？

使用JSON.NET ：

string json = "...";
dynamic data = JsonConvert.DeserializeObject(json);
if((bool)data.success)
{
     IEnumerable<dynamic> records = data.result.records;

     IEnumerable<int> names = records.Select(r => (int)r._id);
     IEnumerable<string> postal = records.Select(r => (string)r.postal_code);
     IEnumerable<string> schools = records.Select(r => (string)r.all_schools_2016);
}