I'm getting json string from webapi like this
{"page":1,"total_results":33,"total_pages":2,"results":
[{"vote_count":8017,"id":603,"video":false,"vote_average":7.9,"title":"The Matrix","popularity":7.82272,"poster_path":"\/lZpWprJqbIFpEV5uoHfoK0KCnTW.jpg","original_language":"en","original_title":"The Matrix","genre_ids":[28,878],"backdrop_path":"\/7u3pxc0K1wx32IleAkLv78MKgrw.jpg","adult":false,"overview":"Set in the 22nd century, The Matrix tells the story of a computer hacker who joins a group of underground insurgents fighting the vast and powerful computers who now rule the earth.","release_date":"1999-03-30"},
{"vote_count":2750,"id":605,"video":false,"vote_average":6.4,"title":"The Matrix Revolutions","popularity":5.073697,"poster_path":"\/sKogjhfs5q3azmpW7DFKKAeLEG8.jpg","original_language":"en","original_title":"The Matrix Revolutions","genre_ids":[12,28,53,878],"backdrop_path":"\/pdVHUsb2eEz9ALNTr6wfRJe5xVa.jpg","adult":false,"overview":"The human city of Zion defends itself against the massive invasion of the machines as Neo fights to end the war at another front while also opposing the rogue Agent Smith.","release_date":"2003-11-05"},
{"vote_count":0,"id":411948,"video":false,"vote_average":0,"title":"Matrix","popularity":1.004394,"poster_path":"\/cseRq8R9RGN66SNUgcD7RJAxBI7.jpg","original_language":"en","original_title":"Matrix","genre_ids":[],"backdrop_path":null,"adult":false,"overview":"John Whitney, Sr. (April 8, 1917 – September 22, 1995) was an American animator, composer and inventor, widely considered to be one of the fathers of computer animation.","release_date":"1971-05-18"}]}
I only want to get title from above string into list.
Here's my code
public List<string> ExtractMoviesList(string movieTitle)
{
using (var client = new HttpClient())
{
// HTTP GET
var response = client.GetAsync(string.Format("{0}{1}", movies_Url, movieTitle)).Result;
using (HttpContent content = response.Content)
{
var json = content.ReadAsStringAsync();
var result = JsonConvert.DeserializeObject<List<Movies>>(json.Result);
return result.Select(p=>p.Title).ToList();
}
}
}
There's something wrong with this line of code: var result = JsonConvert.DeserializeObject<List<Movies>>(json.Result); after this line executed the var result is getting just null.
Your problem is that you are trying to deserialize your JSON as a List<T>, but the root object in your JSON is not an array, it's an object. This is easy to see if you format and indent your JSON using, say, https://jsonformatter.curiousconcept.com/:
{
"page":1,
"total_results":33,
"total_pages":2,
"results":[
{
"title":"The Matrix",
// Other fields
},
// Other movies
]
}
The data model to which you are binding your JSON must reflect this outer container object for deserialization to succeed. Luckily http://json2csharp.com/ or Paste JSON as Classes will generate one for you:
public class Movie
{
public string title { get; set; }
public int vote_count { get; set; }
public int id { get; set; }
public bool video { get; set; }
public double vote_average { get; set; }
public double popularity { get; set; }
public string poster_path { get; set; }
public string original_language { get; set; }
public string original_title { get; set; }
public List<object> genre_ids { get; set; }
public string backdrop_path { get; set; }
public bool adult { get; set; }
public string overview { get; set; }
public string release_date { get; set; }
}
public class RootObject
{
public int page { get; set; }
public int total_results { get; set; }
public int total_pages { get; set; }
public List<Movie> results { get; set; }
}
Now you can do:
var result = JsonConvert.DeserializeObject<RootObject>(json.Result);
return result.results.Select(m => m.title).ToList();
Incidentally, if you don't want to create a data model just to extract the titles from this JSON, you can use Json.NET's LINQ to JSON functionality to load and query the JSON directly:
var result = JToken.Parse(json.Result);
return result.SelectTokens("results[*].title").Select(t => (string)t).ToList();
Here I am using SelectTokens() with the JsonPATH wildcard operator [*] to find all entries in the results array.
Working .Net fiddle showing both options.
Related
I am receiving a json file via api, that json file will be converted into a class that I cant touch and has around 400 properties. the json is using for the key names CamelCase and in the same json some keys are in the format of snake_case.
I am currently using System.Text.Json but open to change to Newtonsoft.json is needed.
I tried to create a JsonSnakeCaseNamingPolicy class (only converting the property names to snake_case) and used in the JsonSerializerOptions like this:
var deserializeOptions = new JsonSerializerOptions()
{
PropertyNameCaseInsensitive = true,
PropertyNamingPolicy = new JsonSnakeCaseNamingPolicy()
};
var flexImport = JsonSerializer.Deserialize<List<FlexImport>>(input.MappedObjectJson, deserializeOptions);
But then the properties in CamelCase don't get populated. Any idea on how to achieve this situation?
This the json sample:
[{\"BatchId\":123,\"Title_Id\":123,\"CurrentNumber\":\"aa705128\",\"address\":\"122 BLACKSGATE EN\",\"curr_interest_rate\":4},{\"BatchId\":2,\"Title_Id\":1,\"CurrentNumber\":\"27705128\",\"address\":\"90 ARMA DR\",\"curr_interest_rate\":5},{\"BatchId\":2,\"Title_Id\":2,\"CurrentNumber\":\"30877674\",\"address\":\"6485 N SIN CIR\",\"curr_interest_rate\":4}]"
And here is part of the destination class:
public class FlexImport
{
public long BatchId { get; set; }
public long TitleId { get; set; }
public string CurrentNumber { get; set; }
public string Address { get; set; }
public decimal? CurrInterestRate { get; set; }
}
Use JSON attributes
public class FlexImport
{
public long BatchId { get; set; }
[JsonPropertyName("Title_Id")]
public long TitleId { get; set; }
public string CurrentNumber { get; set; }
[JsonPropertyName("address")]
public string Address { get; set; }
[JsonPropertyName("curr_interest_rate")]
public decimal? CurrInterestRate { get; set; }
}
Etc. Adjust as needed.
I have a response from Jira API, require to be deserialized into data model:
com.atlassian.greenhopper.service.sprint.Sprint#40675167[id=10151,rapidViewId=171,state=CLOSED,name=Sprint 37.1,startDate=2015-07-30T16:00:22.000+03:00,endDate=2015-08-13T16:00:00.000+03:00,completeDate=2015-08-13T14:31:34.343+03:00,sequence=10151]
This is actually the information of current sprint for issue.
I need to deserialize it to a model like:
public class Model
{
public string name { get; set; }
...
}
I have already removed all non-required information, like com.atlassian.greenhopper.service.sprint.Sprint#40675167 using Regex pattern \[(.*?)\] so I have brackets and all inside.
Now I stopped completely trying to find the a way to convert this string to a data model.
Found the following thread at the Atlassian Answers page and there appears to be no JSON representation of that inner Object. As shown in the example from that thread:
customfield_10007:[
"com.atlassian.greenhopper.service.sprint.Sprint#a29f07[rapidViewId=<null>,state=CLOSED,name=NORD - Sprint 42,startDate=2013-07-29T06:47:00.000+02:00,endDate=2013-08-11T20:47:00.000+02:00,completeDate=2013-08-14T15:31:33.157+02:00,id=107]",
"com.atlassian.greenhopper.service.sprint.Sprint#769133[rapidViewId=<null>,state=ACTIVE,name=NORD - Sprint 43,startDate=2013-08-14T15:32:47.322+02:00,endDate=2013-08-23T15:32:47.322+02:00,completeDate=<null>,id=117]"
],
The response is indeed a JSON array, but the array itself contains CSV's, so you can make use of the following to parse that:
public class DataObject
{
public string id { get; set; }
public string rapidViewId { get; set; }
public string state { get; set; }
public string name { get; set; }
public string startDate { get; set; }
public string endDate { get; set; }
public string completeDate { get; set; }
public string sequence { get; set; }
}
public class Program
{
private const string sampleStringData =
#"[id=10151,rapidViewId=171,state=CLOSED,name=Sprint 37.1,startDate=2015-07-30T16:00:22.000+03:00,endDate=2015-08-13T16:00:00.000+03:00,completeDate=2015-08-13T14:31:34.343+03:00,sequence=10151]";
static void Main(string[] args)
{
var dataObject = new DataObject();
string[][] splitted;
var sampleWithNoBrackets = sampleStringData.Substring(1,sampleStringData.Length-2);
splitted = sampleWithNoBrackets.Split(',').Select(p => p.Split('=')).ToArray();
dataObject.id = splitted[0][1];
dataObject.rapidViewId = splitted[1][1];
dataObject.state = splitted[2][1];
dataObject.name = splitted[3][1];
dataObject.startDate = splitted[4][1];
dataObject.endDate = splitted[5][1];
dataObject.completeDate = splitted[6][1];
dataObject.sequence = splitted[7][1];
Console.ReadKey();
}
}
Here's the output for the above:
I have a JSON object that comes with a long list of area codes. Unfortunately each area code is the object name on a list in the Data object. How do I create a class that will allow RestSharp to deserialize the content?
Here's how my class looks now:
public class phaxioResponse
{
public string success { get; set; }
public string message { get; set; }
public List<areaCode> data { get; set; }
public class areaCode
{
public string city { get; set; }
public string state { get; set; }
}
}
And here's the JSON content:
{
success: true
message: "277 area codes available."
data: {
201: {
city: "Bayonne, Jersey City, Union City"
state: "New Jersey"
}
202: {
city: "Washington"
state: "District Of Columbia"
} [...]
}
Since this JSON is not C# friendly, I had to do a little bit of hackery to make it come out properly. However, the result is quite nice.
var json = JsonConvert.DeserializeObject<dynamic>(sampleJson);
var data = ((JObject)json.data).Children();
var stuff = data.Select(x => new { AreaCode = x.Path.Split('.')[1], City = x.First()["city"], State = x.Last()["state"] });
This code will generate an anonymous type that best represents the data. However, the anonymous type could be easily replaced by a ctor for a more normal DTO class.
The output looks something like this:
your json is incorrect, but if you do correct it you can use a json-to-csharp tool like the one on http://json2csharp.com/ to generate your classes:
public class __invalid_type__201
{
public string city { get; set; }
public string state { get; set; }
}
public class Data
{
public __invalid_type__201 __invalid_name__201 { get; set; }
}
public class RootObject
{
public bool success { get; set; }
public string message { get; set; }
public Data data { get; set; }
}
I don't know anything about RestSharp, but if you're using Newtonsoft on the server side, then you can just pass a JObject to your method. Then you can interrogate the object to see what type of object it really is and use JObject.ToObject() to convert it.
I think using Dictionary<int,areaCode> is the easiest way.
public class phaxioResponse
{
public string success { get; set; }
public string message { get; set; }
public Dictionary<int,areaCode> data { get; set; }
public class areaCode
{
public string city { get; set; }
public string state { get; set; }
}
}
Then:
var res= JsonConvert.DeserializeObject<phaxioResponse>(json);
Console.WriteLine(string.Join(",", res.data));
I want to do something quite simple.
I just want to take a JSON string (which I have) and populate a whole bunch of stuff with it.
The problem for me is that there are arrays hidden in array inside more arrays, and I can't get at my data.
I tried standard deserialization like so ...
var apiData = JsonConvert.DeserializeObject<RootObject>(json);
But this only lets me get into the top layer - what is in rootObject
I tried making a dictionary ...
Dictionary<string, dynamic> values = JsonConvert.DeserializeObject<Dictionary<string, dynamic>>(json);
but that doesn't let me drill down either (or I can't make it).
I have set up my c# using json2c#
I've been all over the internet including here.
The closest I have got to creating anything close is an expandoObject
var converter = new ExpandoObjectConverter();
dynamic obj = JsonConvert.DeserializeObject<ExpandoObject>(json, converter);
which I can see from the debugger is keeping everything structured as I would like but I've no idea how to get some of the stuff out.
Long story short, its been two days now and I'm bashing my head against a brick wall.
I just want to be able to get the data out of the JSON string and I can't change that string as its not mine.
public class NewsArticlesList
{
public string title { get; set; }
public string link { get; set; }
public string source { get; set; }
public string snippet { get; set; }
}
public class jobsList
{
public string title { get; set; }
public string titleLinkUrl { get; set; }
public List<object> relatedSearchesList { get; set; }
public string formattedTraffic { get; set; }
public int trafficBucketLowerBound { get; set; }
public int interestLevel { get; set; }
public string interestColor { get; set; }
public List<NewsArticlesList> newsArticlesList { get; set; }
public double startTime { get; set; }
public string shareUrl { get; set; }
public string date { get; set; }
}
public class jobsByDateList
{
public string date { get; set; }
public string formattedDate { get; set; }
public List<jobsList> jobsList { get; set; }
}
public class RootObject
{
public string summaryMessage { get; set; }
public double dataUpdateTime { get; set; }
public List<jobsByDateList> jobsByDateList { get; set; }
public string oldestVisibleDate { get; set; }
public bool lastPage { get; set; }
}
My problem is these lists inside lists inside lists.
I can get to jobsListByDate.formattedDate but I can't get anywhere near jobsListByDate.jobsList.titleLinkUrl let alone inside the NewsArticlesList to those sources.
Apologies if this is super-easy (I hope it is) but I'm a WP8 noob.
I know there are similar threads on SO, but none of them seem to deal with such deep arrays.
I was not stipulating which branch to go down and so it was confused.
System.Diagnostics.Debug.WriteLine(apiData.jobsByDateList[0].jobsList[0].interestLevel);
I was trying to get in using
System.Diagnostics.Debug.WriteLine(apiData.jobsByDateList.jobsList.interestLevel);
and intellisense was freaking out.
With the [0] I'm now able to drill in just fine and don't need the expandoobject. Just needed to sleep on it. :-)
I am trying to display data collected from RestSharp. Just for example i have the following code but don't know how to display the data as it currently is.
private void readJSON()
{
string url = "http://www.jsonurl.com";
var restClient = new RestClient(url);
var request = new RestRequest(Method.GET);
//82.147.22.3
//What we are requesting:value
request.AddParameter("apikey", "xxxxxtheapikeygoesherexxxxx");
restClient.ExecuteAsync<Entry>(request, response =>
{
//What to do with the JSON?
});
}
I know i need to place the JSON between the ExecuteAsync<>() but i want to be able to take the data and for example place it into a listbox. Below is an example of the result given back to me from JSONtoSharp.com. code:
public class Change
{
public string direction { get; set; }
public int amount { get; set; }
public int actual { get; set; }
}
public class itementry
{
public int position { get; set; }
public int prePosition { get; set; }
public int Weeks { get; set; }
public string ar { get; set; }
public string ti { get; set; }
public Change ch { get; set; }
}
public class RootObject
{
public int charDate { get; set; }
public int retrieved { get; set; }
public List<Entry> entries { get; set; }
}
I am sure the answer is simple as glass and I just need help as i am completely lost in this one.. cant find any good documentation to help me out!
Note: This is for C# on Windows Phone 7 using RestSharp and Newtonsoft
restClient.ExecuteAsync<Entry>(request, response =>
{
//Supply your JSON data to a callback
Callback(response.Data);
});
public void Callback(string jsonResponse)
{
var responseList = JsonConvert.DeserializeObject<RootObject>(jsonResponse);
//Assuming you have properly setup binding properties for Listbox, databind listbox here
YourListBox.ItemsSource = responseList.entries;
}
Here JsonConvert is from NewtonSoft package