Here is the part of the code with the if statement in which I want to check if data.userName (the string) is in users (the JSON object).var dataToSend null if (!("undefined" typeof data) !(data null)). dataToSend JSON.stringify(data) r.send(dataToSend) Then you can send notNull to any optional object in a JSON dict and youll get nil back if its NSNull.try to check for [jPhoto count] or [NSNull null]. I know how to check if a key in a JSON object is null by using jsonObject.isNull(key), but how do I check if the object itself is null or empty? had internet when requesting for data and lost it when receiving it from the server I get a NullException too, What I thought was checking if the JSON object is null beforegetting product details by making HTTP request. JSONObject json jsonParser.makeHttpRequest(SEARCHURL, "POST" Newtonsoft.Json has JToken class which checks if the Jsons schema is valid or not but i dont find any method to check if all the fields inside json object are filled.public static IEnumerable DescendantsAndSelf(this JToken rootNode) . if (rootNode null). JSON data has the concept of null and empty arrays and objects.When serializing to JSON, if a value of a property in the data object is null, then it will be serialized as a JSON null. When I check if the. objective cWhen I get a JSON object from PHP on iOS, I get the NULL value 2015-07-16.
Im trying to post json object, then try to receive json object. Through sniffer it show that post and get successful works. But receiving object is always null. Home. Internet Technology Check if JSON response field is null.(myInfo.education?.concentration?.name ! null). but I believe it will only work if the property is actually on the object ie the json section not missing. In Java, if I use the following JSON string as an example, how would I check if the objects are empty/null?As per this documentation JSONObject API, isNull checks for value NULL, which is not true in your case.