I'm trying to use the Giant Bomb API. I also use Newtonsoft.Json to deserialize the response object. I've a problem when I try to convert the response to classes. I've a problem with something who looks like an array. I don't understand what it exactly is and which using ref i should use to make it work ...
Here is the syntax : public ApiSearchResult[] results { get; set; }
Here is the tutorial : http://social.technet.microsoft.com/wiki/contents/articles/26920.winrt-using-giant-bomb-api-to-get-games-information.aspx
After looking at the documentation, it appears that ApiSearchResult is supposed to be Result. Try changing public ApiSearchResult[] results { get; set; } to
public Result[] results { get; set; }.
Related
I am attempting to use JsonSerializer.Deserialize() from System.Text.JSON in .NET 6.
I have no control over the format of the JSON.
I have used it successfully in the past but now the data I need to consume is more complicated (but not VERY complicated). I am assuming that I am simply describing my data incorrectly.
I have tried several things.... but the description below is the only way so far that I could consume the data at all.
I think my biggest problem is that I am trying to use the wiz-bang "Paste Special -> Paste JSON as Classes" without really understanding how to form my classes for serialization/deserialization.
Here is a simple example of the JSON I am trying to consume:
[
{
"version": "1.0b",
"sub_version": "x.y.barf"
},
{
"somestring": "I am a string",
"isCool": false,
"a_cool_array": [
"bob",
"jill",
"pete"
]
}
]
If I use the whiz-bang "Paste Special" tool, I get the following generated for me.
public class Rootobject
{
public Class1[] Property1 { get; set; }
}
public class Class1
{
public string version { get; set; }//<-- I need these to remain in their own object
public string sub_version { get; set; }//<-- I need these to remain in their own object
public string somestring { get; set; }
public bool isCool { get; set; }
public string[] a_cool_array { get; set; }
}
Here is the problem that I have.
The whiz-bang tool put my first object (with one version strings) and second (more complicated) object into the same object.
If I use a call like this:
var deserializedJSON = JsonSerializer.Deserialize<List<Class1>>(myJSONTextHere);
I end up with two objects in the list.
The first one has the versions filled out, the second one only has the other fields filled out.
This all makes sense to me but I don't know how to get around the problem.
I need these objects to model the JSON and I need them to save back in the same format when I re-serailize the modified classes elsewhere. This isn't my exact problem as I have simplified it for the question.
I have found one way around this problem.
It is ugly but seems to work. I hate that my code has to know about the data it is manipulating.
I used the actual JSON DOM to split the two disparate classes into individual JSON objects, then used the class de-serializer to load the individual objects into their given types.
In the following example, I am not checking anything.. I happen to know the order of the objects. I could check the raw JSON to make sure it was what I was looking for. In this case, I don't need to.
So, instead of taking the class structure as pasted by the super spiffy "Paste Classes from JSON" thingamajigger.. I split the classes myself.
Like this:
public class VersionClass
{
public string version { get; set; }
public string sub_version { get; set; }
}
public class DataClass
{
public string somestring { get; set; }
public bool isCool { get; set; }
public string[] a_cool_array { get; set; }
}
Then, I can load the JSON into the objects I need like this:
using var jsonDoc = JsonDocument.Parse(jsonText);
var versionClass = jsonDoc.RootElement[0].Deserialize<VersionClass>();
var dataClass = jsonDoc.RootElement[1].Deserialize<DataClass>();
I hope this helps someone having the same problem.
Your json needs to look like this:
{
"class1": [
//more json
],
"class2": [
//more json
]
}
Then you will have:
public class RootObject
{
// class1 and 2 in here
}
public class Class1
{
}
public class Class2
{
}
I am working with an API that returns data in JSON format (as far as I can tell, this is my first time working with a true API or JSON). I read a bunch about working with JSON in C#, and eventually got the Newtonsoft.Json library. Unfortunately, I am having a hard time converting the response I am receiving into a C# class following the examples that exist in the Newtonsoft documentation.
Here is an example of the data returned by this API:
{"name":{"id":1,"name":"name","pID":1,"revisionDate":1390580000000}}
And heres what I have so far:
public class apiDataObject
{
public long id {get; set;}
public string name { get; set; }
public int pID { get; set; }
public long revisionDate { get; set; }
}
public long getID()
{
try
{
data = WebRequest.Create(baseURL);
retData = data.GetResponse().GetResponseStream();
}
catch (Exception exception)
{
outputBox.AppendText(Environment.NewLine + exception.ToString());
}
retDataReader = new StreamReader(retData);
returnedData = retDataReader.ReadToEnd();
outputBox.AppendText(returnedData);
apiDataObject test = new apiDataObject();
JsonConvert.PopulateObject(returnedData, test);
return test.id;
}
I have also tried replacing the JsonConvert.PopulateObject(returnedData, test) with:
apiDataObject test = JsonConvert.DeserializeObject<apiDataObject>(returnedData)
The problem is that my "test" object is always empty after the code finishes. I have stepped through the code, and everything works great until I get to the lines where the test object is created, and supposedly populated. I also tried the inbuilt Microsoft libraries and had the exact same issue. I am honestly stumped, I have spent 2 or 3 hours looking at these few lines of code and tons of documentation and samples of the Newtonsoft.Json library, but simply cant figure out where I've gone wrong here. Any help would be greatly appreciated.
From the JSON you posted, its actually a dictionary type: I changed your method to show you, I tested it out and it works.
public long GetID()
{
var testDict = new Dictionary<string, apiDataObject>();
var returnedData = "{\"name\":{\"id\":1,\"name\":\"name\",\"pID\":1,\"revisionDate\":1390580000000}}";
JsonConvert.PopulateObject(returnedData, testDict);
return testDict["name"].id;
}
Running your original code throws an exception telling you that it doesn't know what to do with the first "name".
Just in case anyone ever comes across this in a search, I figured out an alternative solution to working with this type of data as well. The Newtonsoft.Json library contains a function called DeserializeObject. So for the sample data of:
{"name":{"id":1,"name":"name","pID":1,"revisionDate":1390580000000}}
You can create an object that looks like:
public class Name
{
public int id { get; set; }
public string name { get; set; }
public int pID { get; set; }
public long revisionDate { get; set; }
}
public class RootObject
{
public Name name { get; set; }
}
and then use:
JsonConvert.DeserializeObject<RootObject>(returnedData);
to convert the json into the object without having to use a dictionary.
This is probably "common knowledge", considering the object code can easily be created using the json2csharp converter someone linked earlier, but I was unable to find any direct explanation about when to use the DeserializeObject function or why it should be used versus PopulateObject.
I have a JSON response that I'm trying to deserialize with RestSharp, and it looks like this:
{"devices":[{"device":{"id":7,"deviceid":"abc123","name":"Name"}},
{"device":{"id":1,"deviceid":"def456","name":"Name"}}],
"total":2,
"start":0,
"count":2}
Based off of some suggestions I've found, I've tried to setup my POCO like this:
public class DevicesList
{
public List<DeviceContainer> Devices;
}
public class DeviceContainer
{
public Device Device;
}
public class Device
{
public int Id { get; set; }
public string DeviceId { get; set; }
public string Name { get; set; }
}
And then my execution looks like this:
// execute the request
var response = client.Execute<DevicesList>(request);
However, response.Data is NULL, and I've tried other variations with no luck.
So, what class structure and mapping should be used for this situation? I've also tried this without the extra DeviceContainer class.
Thanks for the help.
I had a slightly different issue when my deserialization POCO contained an array..
Changing it from Devices[] to List<Devices> resolved the issue and it deserialized correctly.
RestSharp only operates on properties, it does not deserialize to fields, so make sure to convert your Devices and Device fields to properties.
Also, double check the Content-Type of the response, if the responses is something non-default, RestSharp may not uses the JsonDeserializer at all. See my answer on RestSharp client returns all properties as null when deserializing JSON response
Something that I ran into is, it does not work if your using interfaces like: IEnumerable or IList, it has to be a concrete type.
This will not work, where as it does for some other json serializers like json.net.
public class DevicesList
{
public IEnumerable<DeviceContainer> Devices { get; set; }
}
public class DeviceContainer
{
...
}
it would have to be something like this:
public class DevicesList
{
public List<DeviceContainer> Devices { get; set; }
}
public class DeviceContainer
{
...
}
RestShartp doesn't support DataAnnotation/DataMember, rename your properties with no maj:
Devices -> devices
Device -> device
AND don't forget the {get; set;} ;).
My problem was entirely different, I naively thought JsonDeserializer supports JsonProperty attribute, but thats not true. So when trying to deserialize into
public class AvailableUserDatasApi
{
[JsonProperty("available-user-data")]
public List<AvailableUserDataApi> AvailableUserDatas { get; set; }
}
it failed.. But changing AvailableUserDatas to AvailableUserData was enough for things to start working.
I've had a look at a few threads but what I'm aiming for I can't seem to find.
I have the following JSON strings returned:
On success:
{"success":{"username":"key"}}
On Error:
{"error":{"type":101,"address":"/","description":"link button not pressed"}}
I need to be able to de-serialize these into a class and determine whether I've got an error or a success message to carry on doing it. Any ideas on how to achieve this?
thanks,
Adam
No need to declare a lot of tiny classes. dynamic keyword can help here.
dynamic jObj = JObject.Parse(json);
if (jObj.error!= null)
{
string error = jObj.error.description.ToString();
}
else
{
string key = jObj.success.username.ToString();
}
One option is to use http://nuget.org/packages/newtonsoft.json - you can either create your own custom class to deserialize into or use dynamic as the target type.
var result = JsonConvert.DeserializeObject<Result>(jsonString);
class Result
{
public SuccessResult success { get; set; }
public ErrorResult error { get; set; }
}
class SuccessResult
{
public string username { get; set; }
}
class ErrorResult
{
public int type { get; set; }
public string address { get; set; }
public string description { get; set; }
}
If you need just to check for success, it is possible to just check result.StartsWith("{\"success\":") to avoid unnecessary parsing. But this should only be done if you have guarantee that the JSON string will always be exactly like this (no extra whitespaces etc.) - so it is usually only appropriate if you own the JSON generation yourself.
This answer covers most options, including rolling your own parser and using JSON.Net:
Parse JSON in C#
You could also just write a regex if the format is going to be that simple...
I'm having trouble deserializing the following XML w/ restsharp
<Xid>
<Id>118</Id>
<Active>true</Active>
<Xid>20</Xid>
<CreatedDate>2011-09-16T18:15:32</CreatedDate>
<CreatedUserId>1782</CreatedUserId>
<ModifiedDate>2011-09-16T18:15:32</ModifiedDate>
<ModifiedUserId>1782</ModifiedUserId>
<TableName>ProjectRate</TableName>
<ObjectId>644</ObjectId>
<SystemGuid>157f2e2d-5e8b-41c7-b932-09c1d75d0ccc</SystemGuid>
</Xid>
I can't use a class named 'Xid' with a member named 'Xid' as there is a conflict in C#. I have tried manually declaring the XmlRoot on the XidClass object, but it doesn't seem to be getting picked up by RestSharp's deserializer. Is there a way to do this with RestSharp, or am I going to need to write a custome deserializer for this particular chunk of xml?
You need to create the class by hand, befoe you can deserialize the XML:
public class Xid
{
public int Id { get; set; }
public bool Active { get; set; }
public int Xid { get; set; }
...
}
The you should be able to deserialize using something like:
Xid xid = xml.Deserialize<Xid>(response);
(Have a look here: Testing the Deserialization of RestSharp without proper REST-Api)