本文实例讲述了asp.net提取多层嵌套json数据的方法。分享给大家供大家参考,具体如下:
在.net 2.0中提取这样的json:
复制代码代码如下:
{"name":"lily","age":23,"addr":{"city":guangzhou,"province":guangdong}}
引用命名空间:
using Newtonsoft.Json;using Newtonsoft.Json.Linq;
可以把上面的JSON看成一个对象.你只要写对应的类即可
public class UserInfo{public string name;public int age;public address addr;}public class address{public string city;public string province;}
然后在解析的地方这样写:
string jsonData="{/"name/":/"lily/",/"age/":23,/"addr/":{/"city/":guangzhou,/"province/":guangdong}}";UserInfo user=(UserInfo)JsonConvert.DeserializeObject(jsonData, typeof(UserInfo));
得到City的值只要:user.addr.City;
这样实现也行
JObject jsonObj = JObject.Parse(jsonData);string name=jsonObj ["name"].ToString();string age=jsonObj ["age"].ToString();string city=((JObject )jsonObj ["addr"])["city"].ToString();string province=((JObject )jsonObj ["addr"])["province"].ToString();
如何这个json是动态的呢?譬如让你输入一个json,如
复制代码代码如下:
{"name":"lily","age":23,"addr":{"city":guangzhou,"province":guangdong}};
然后让你输入一个对象,如city,然后系统会输出guangzhou这个值,那这样的话,json就是动态生成的了,我想了解有没有读取这样的json的方法。(注意,json是多级嵌套的。)
就用遍历
public string GetJsonValue(JEnumerable<JToken> jToken,string key){IEnumerator enumerator = jToken.GetEnumerator();while (enumerator.MoveNext()){JToken jc = (JToken)enumerator.Current;if (jc is JObject||((JProperty)jc).Value is JObject){return GetJsonValue(jc.Children(), key);}else{if (((JProperty)jc).Name == key){return ((JProperty)jc).Value.ToString();}}}return null;}
在调用的时候:
string jsonData = "{/"name/":/"lily/",/"age/":23,/"addr/":{/"city/":/"guangzhou/",/"province/":/"guangdong/"}}";JObject jsonObj = JObject.Parse(jsonData);Response.Write(GetJsonValue(jsonObj.Children(), "province"));
如果有多层嵌套的数组
string jsonData = "{/"addr/":[{/"city/":/"guangzhou/",/"province/":/"guangdong/"},{/"city/":/"guiyang/",/"province/":/"guizhou/"}]}";JObject jsonObj = JObject.Parse(jsonData);JArray jar = JArray.Parse(jsonObj["addr"].ToString());JObject j = JObject.Parse(jar[0].ToString());Response.Write(j["city"]);
JSON转XML:
复制代码代码如下:
string xmlstr=((XmlDocument)JsonConvert.DeserializeXmlNode(jsonData)).InnerXml.ToString();