So I've got a JSON string that I'm handling with json.net. I'm putting this into a dynamic object and then just accessing the values from that.
dynamic data = JObject.Parse(JsonString);
if(data !=null)
{
string names = data.names.all
int count = data.member_count;
}
The issue is if data doesn't contain member_count (or names.all) it doesn't throw an error it just stops dead (I assume it returns out). I've tried to search for a solution but I'm not even sure how to word it.
I am new to C# and JSON and need some help in getting the Key name(s) in a list of a nested JSON object. The keys are dynamic so I won't necessarily know the keys.
sample code I've tried.
```
protected void test()
{
var mystring = #"{
""zone1"": {
""sites"": {
""site1"": {
""to"": ""email1"",
""subject"": ""subjecttxt"",
""link"": ""somesite""
},
""site2"": {
""to"": ""email1"",
""subject"": ""subject"",
""link"": ""somesite""
}
},
""zone2"": {
""to"": ""email1"",
""subject"": ""subject"",
""link"": ""somelink""
}}";
var rss = JObject.Parse(mystring);
foreach (var section in rss)
{
Console.Write(section.Key);
IList<JToken> result = rss["zone1"]["sites"].Children().ToList();
var zone = section.Key;
var site = rss[zone]["sites"];
foreach (var subsite in rss["zone1"]["sites"])
{
var subs = subsite.Parent.ToString();
// some other code
}
}
}
```
Looking for a result:
site1,
site2,
...
I can get the children as IList but looking for something similar to "section.Key" as noted above.
Thank you for your help.
I believe what you are looking for is to get the properties of the sites. Since accessing the rss["zone1"]["sites"] returns a JToken, you will need to convert that to JObject and then use Properties() method to get the data you need.
var sites = ((JObject)rss["zone1"]["sites"]).Properties();
Then you can simply iterate over the IEnumerable<Jproperty> to get the Name of the property or whatever else you need from under it.
To get the section.Key for the sites, you can use the following code.
foreach(var site in (JObject)rss["zone1"]["sites"]) {
Console.WriteLine(site.Key);
}
Output:
site1
site2
Your first call to JObject.Parse already does all the work of converting a string into a structured JSON object. The currently-accepted answer redoes some of this work by (1) turning a structured JSON object back into a string, and then (2) re-parsing it with JObject.Parse. There is a simpler way.
Instead, you can cast the value stored at rss["zone1"]["sites"] into a JObject. (The expression rss["zone1"]["sites"] has type JToken, which is a parent class of JObject, but in this case we happen to know that rss["zone1"]["sites"] is always JSON object, i.e. a collection of key-value pairs. Therefore, this cast is safe to perform.)
This is what the code might look like:
var sites = (JObject) rss["zone1"]["sites"];
foreach (var site in sites)
{
Console.WriteLine(site.Key);
}
Product_Details result = response.ResultAs<Product_Details>();
ArrayList myarr = result;
foreach (var item in result.ToString())
{
}
I want to change the variable result into an array list because this variable is containing data of full table and I need to iterate it.
IF i understand correctly, you are saying that the response contains multiple objects of type Product_Details. I do however need some more information; is the response coming in a JSON format (does it need to be serialized for example?).
Either way try something along the lines of this;
List<Product_Details> result = new List<Product_Details>(); // make a new list
result = response.ResultAs<List<Product_Details>>(); // assign response to list
foreach (Product_Details pd in result)
{
// use pd. to access the variable
}
// (i kept the .ResultAs since i dont know how or what your response object is/has,but did cast it to a list explicitly)
If you need to find out on how to deserialize JSON objects you can start Here
As discussed in the comments you said it was in JSON format, If you are using NewtonSoft.JSON (nuget) the code would be:
using (client)
{
HttpResponseMessage result = await client.GetAsync(tmpUri);
if (result.IsSuccessStatusCode)
{
var content = await result.Content.ReadAsStringAsync();
oc = JsonConvert.DeserializeObject<ObservableCollection<T>>(content);
}
}
(for the sake of clarity where this code should be i included the api call. you can of course, omit this.)
I am having trouble understanding when to use JContainer, JObject, and JToken. I understand from the "standards" that JObject is composed of JProperties and that JToken is the base abstract class for all of the JToken types, but I don't understand JContainer.
I am using C# and I just bought LinqPad Pro 5.
I have a JSON data source in a file, so I'm deserializing that file's contents successfully using this statement:
string json;
using (StreamReader reader = new StreamReader(#"myjsonfile.json"))
{
json = reader.ReadToEnd();
}
At that point, I take the JSON string object and deserialize it to a JObject (and this might be my mistake--perhaps I need to make jsonWork a JToken or JContainer?):
JObject jsonWork = (JObject)JsonConvert.DeserializeObject(json);
In my JSON data (the string represented by JSON), I have three objects--the top-level object look similar to this:
{
"Object1" : { ... },
"Object2" : { ... },
"Object3" : { ... }
}
Each object is composed of all sorts of tokens (arrays, strings, other objects, etc.), so it is dynamic JSON. (I used ellipses as placeholders rather than muddying up this question wit lots of JSON data.)
I want to process "Object1", "Object2", and "Object3" separately using LINQ, however. So, ideally, I would like something like this:
// these lines DO NOT work
var jsonObject1 = jsonWork.Children()["Object1"]
var jsonObject2 = jsonWork.Children()["Object2"]
var jsonObject3 = jsonWork.Children()["Object3"]
But the above lines fail.
I used var above because I have no idea what object type I should be using: JContainer, JObject, or JToken! Just so you know what I want to do, once the above jsonObject# variables are properly assigned, I would like to use LINQ to query the JSON they contain. Here is a very simple example:
var query = from p in jsonObject1
where p.Name == "Name1"
select p
Of course, my LINQ ultimately will filter for JSON arrays, objects, strings, etc., in the jsonObject variable. I think once I get going, I can use LinqPad to help me filter the JSON using LINQ.
I discovered that if I use:
// this line WORKS
var jsonObject1 = ((JObject)jsonWork).["Object1"];
Then I get an JObject type in jsonObject1. Is this the correct approach?
It is unclear to me when/why one would use JContainer when it seems that JToken and JObject objects work with LINQ quite well. What is the purpose of JContainer?
You don't really need to worry about JContainer in most cases. It is there to help organize and structure LINQ-to-JSON into well-factored code.
The JToken hierarchy looks like this:
JToken - abstract base class
JContainer - abstract base class of JTokens that can contain other JTokens
JArray - represents a JSON array (contains an ordered list of JTokens)
JObject - represents a JSON object (contains a collection of JProperties)
JProperty - represents a JSON property (a name/JToken pair inside a JObject)
JValue - represents a primitive JSON value (string, number, boolean, null)
So you see, a JObject is a JContainer, which is a JToken.
Here's the basic rule of thumb:
If you know you have an object (denoted by curly braces { and } in JSON), use JObject
If you know you have an array or list (denoted by square brackets [ and ]), use JArray
If you know you have a primitive value, use JValue
If you don't know what kind of token you have, or want to be able to handle any of the above in a general way, use JToken. You can then check its Type property to determine what kind of token it is and cast it appropriately.
JContainer is a base class for JSON elements that have child items. JObject, JArray, JProperty and JConstructor all inherit from it.
For example, the following code:
(JObject)JsonConvert.DeserializeObject("[1, 2, 3]")
Would throw an InvalidCastException, but if you cast it to a JContainer, it would be fine.
Regarding your original question, if you know you have a JSON object at the top level, you can just use:
var jsonWork = JObject.Parse(json);
var jsonObject1 = jsonWork["Object1"];
Most examples have simple json and I've googled "C# Newtonsoft parse JSON" more than once.
Here's a bit of a json file I was just asked to parse for a csv. The company name value is nested within many arrays / objects so it is semi-complicated in that regard.
{
"page": {
"page": 1,
"pageSize": 250
},
"dataRows": [
{
"columnValues": {
"companyName": [
{
"name": "My Awesome Company",
}
]
}
}
]
}
var jsonFilePath = #"C:\data.json";
var jsonStr = File.ReadAllText(jsonFilePath);
// JObject implementation for getting dataRows JArray - in this case I find it simpler and more readable to use a dynamic cast (below)
//JObject jsonObj = JsonConvert.DeserializeObject<JObject>(jsonStr);
//var dataRows = (JArray)jsonObj["dataRows"];
var dataRows = ((dynamic)JsonConvert.DeserializeObject(jsonStr)).dataRows;
var csvLines = new List<string>();
for (var i = 0; i < dataRows.Count; i++)
{
var name = dataRows[i]["columnValues"]["companyName"][0]["name"].ToString();
// dynamic casting implemntation to get name - in this case, using JObject indexing (above) seems easier
//var name2 = ((dynamic)((dynamic)((dynamic)dataRows[i]).columnValues).companyName[0]).name.ToString();
csvLines.Add(name);
}
File.WriteAllLines($#"C:\data_{DateTime.Now.Ticks}.csv", csvLines);
I am trying to parse a json string returned from the xively feed from an Air Quality Egg. One of the properties says whether the xively feed is public or private. The property is called private and takes the string value "true" or "false". To get data from the feed I am calling xively's Historical Data REST API which successfully returns me valid JSON. I am then using JSON.NET to parse the JSON in C#. My parsing starts thus:
dynamic historicalDatapoints = JValue.Parse(jsonString) as JObject;
if (historicalDatapoints != null)
{
var id = historicalDatapoints.id;
var title = historicalDatapoints.title.ToString();
var privacy = bool.Parse(historicalDatapoints.private.ToString())
// More parsing
}
I have a problem with that last line of code. C# will not let me refer to the property called "private". Here's the corresponding (redacted) JSON:
{
"id": 000000843,
"title": "Blah Road Egg 02",
"private": "false",
//...
}
Using JSON.NET how should I parse out the property private?
Try historicalDatapoints.#private to access that value. If that doesn't work then you could also try historicalDatapoints["private"]