asp.net提取多层嵌套json数据的方法

Posted 2020-08-29 山涧清泉

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"]);