提取多层嵌套Json数据

在.net 2.0中提取这样的json  

{"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{"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  

string xmlstr=((XmlDocument)JsonConvert.DeserializeXmlNode(jsonData)).InnerXml.ToString();

  

{"status":1,"result":{"page":{"currentPage":2,"totalPage":8,"totalCount":8},"addressList":[

{"id":"1","contractName":"李三朵","mobile":"13588888888","phone":"13588888888","addressType":"S","groupName":"","provinceName":"广东省","address":"沙太南路178号","cityName":"广州市","countyName":"天河区"},

{"id":"2","contractName":"李三朵","mobile":"13588888888","phone":"13588888888","addressType":5,"groupName":"","provinceName":"广东省","address":"沙太南路178号","cityName":"广州市","countyName":"天河区"},

{"id":"3","contractName":"李三朵","mobile":"13588888888","phone":"13588888888","addressType":5,"groupName":"","provinceName":"广东省","address":"沙太南路178号","cityName":"广州市","countyName":"天河区"},

{"id":"4","contractName":"李三朵","mobile":"13588888888","phone":"13588888888","addressType":5,"groupName":"","provinceName":"广东省","address":"沙太南路178号","cityName":"广州市","countyName":"天河区"},

{"id":"5","contractName":"李三朵","mobile":"13588888888","phone":"13588888888","addressType":5,"groupName":"","provinceName":"广东省","address":"沙太南路178号","cityName":"广州市","countyName":"天河区"},

{"id":"4","contractName":"李三朵","mobile":"13588888888","phone":"13588888888","addressType":5,"groupName":"","provinceName":"广东省","address":"沙太南路178号","cityName":"广州市","countyName":"天河区"},

{"id":"4","contractName":"李三朵","mobile":"13588888888","phone":"13588888888","addressType":5,"groupName":"","provinceName":"广东省","address":"沙太南路178号","cityName":"广州市","countyName":"天河区"},

{"id":"4","contractName":"李三朵","mobile":"13588888888","phone":"13588888888","addressType":5,"groupName":"","provinceName":"广东省","address":"沙太南路178号","cityName":"广州市","countyName":"天河区"}

]}}

$.ajax({
type : "POST",
url : "PostAjax.aspx",
success: function(data){

   var date = eval("(" + data + ")");   

if(date.status=="1"){

var pageNo=date.result.page.currentPage;
couponPageNo =  parseInt(pageNo);
couponTotalPage = parseInt(date.result.page.totalPage);
addressTotalCount = parseInt(date.result.page.totalCount);
 
 
if(date.result.addressList instanceof Array && date.result.addressList.length>0){

var json = date.result.addressList;
var recordLength = date.result.addressList.length;//此次查询返回的地址记录数

var domStr = ''; //查询结果组装DOM

     for(var i=0; i<json.length; i++){

}

}

}

}

});