查询具有特定属性值的锻炼儿童

Question

我需要将xml数据加载到newtonsoft jobject中，并查询特定名称＆amp;值节点...

这只是一个简化的示例，问题是在最后一行中，即使有一个我正在寻找的ID的exturanfirstlevel元素的孩子，结果效果是无效的...

示例：

  int idFirst = 2;
            int idSecond = 4;
            string json = string.Empty;
            JObject jFirstLevels = new JObject();
            string xml = "<Root><FirstLevel id="1"><Secondlevel id="1"  value="hello11" /><Secondlevel id="2"  value="hello12" /><Secondlevel id="3"  value="hello13" /></FirstLevel><FirstLevel id="2"><Secondlevel id="4" value="hello24" /></FirstLevel><FirstLevel id="3"><Secondlevel id="5" value="hello35" /><Secondlevel id="6" value="hello36" /><Secondlevel id="7" value="hello37" /></FirstLevel></Root>";
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.LoadXml(xml);
            XmlNodeList nodeList;
            nodeList = xmlDoc.SelectNodes("Root/FirstLevel");
            if (nodeList != null)
            {
                if (nodeList.Count > 1)
                {
                    JArray jarray = new JArray();
                    foreach (XmlNode node in nodeList)
                    {
                        json = Newtonsoft.Json.JsonConvert.SerializeXmlNode(node);
                        jarray.Add(JObject.Parse(json));
                    }
                    jFirstLevels["result"] = jarray;
                }
            }
            JObject resultFirstLevel = jFirstLevels["result"].Children<JObject>().FirstOrDefault(x => x["FirstLevel"]["@id"].Value<int>() == idFirst);
            JObject resultSecondLevel = resultFirstLevel.Children<JObject>().FirstOrDefault(x => x["SecondLevel"]["@id"].Value<int>() == idSecond);

Answer 1

这是因为您在ResultFirstLevel中获得了Jproperty的列表。
您需要使用此代码进行切换，例如：

JObject resultFirstLevel = jFirstLevels["result"].Children<JObject>().FirstOrDefault(x => x["FirstLevel"]["@id"].Value<int>() == idFirst);
var firstlevelProperty = resultFirstLevel.Children().Cast<JProperty>().Select(x => x.Value);
var resultSecondLevel = firstlevelProperty.FirstOrDefault(x => x["Secondlevel"]["@id"].Value<int>() == idSecond);

（此外，您输入的XML和测试之间还有一个错别字：它是" secives velvel"，" sequient"，较低的" L"）