Develop Reference

Get the value of the property of the object whose name begins with a number

I'm fetching data from website that returns me an object in a string like this:
{
index: 1,
commentNumber: 20,
feedComments: {
3465665: {
text: "I do not agree",
likeRatio: 0
},
6169801: {
text: "Hello",
likeRatio: 12
},
7206201: {
text: "Great job!",
likeRatio: 5
}
}
}
I want to work with this as an object, that's pretty easy to do, I'll just do this:
string objectString = GetData(); // Artificial GetData() method
dynamic data = JObject.Parse(objectString);
And now I can easily get all properties I want from this object using dynamic
The problem is pretty obvious now, I want to get properties, whose name starts with number (the object data structure I fetch is just designed that way). But property/field names you get from object cannot begin with a number.
int commentNumber = data.commentNumber; // Works fine
string commentText = data.feedComments.3465665.text; // Obviously won't compile
Is there any way to do this?
Note that I want to work with data I fetch as it was an object, I know I get get the comment text right from the string that GetData() method returns using some regex or something, but that's something I want to avoid.

You should really be parsing the JSON into concrete C# classes. Dynamic is slow and vulnerable to runtime errors that are hard to detect.
The comments will go into a Dictionary. For example:
public class Root
{
public int Index { get; set; }
public int CommentNumber { get; set; }
public Dictionary<long, FeedComment> FeedComments { get; set; }
}
public class FeedComment
{
public string Text { get; set; }
public int LikeRatio { get; set; }
}
And deserialise like this:
var result = JsonConvert.DeserializeObject<Root>(objectString);
Now you can access the comments very easily:
var commentText = result.FeedComments[3465665].Text

Task and deserializing objects from api logic and deserializing json

I was hoping someone could help walk me through some of this logic here. I hope this isn't too specific so that maybe it will help other people. It will definitely seem that way, I am sure, but I don't know if this is is common in industry or not (I am supposed to be an economist, but I am helping with the programming until we get someone more skilled at this trade).
The background: I was asked to deserialize a json object that is returned by the api, but I am not sure if I am understanding the code correctly so until then I won't be able to deserialize it. My two hopes are that someone can correct me if my logic is incorrect and to help me figure out how to deserialize it.
The goal is pretty simple: show a list using a UITableView of the items that are returned from the api. I have the UITableView that is all set up. I just need to fill it with the data now. Here is what was written before me. It is the task/api:
public async Task<Food> FoodCatalog(int category)
{
string url = Service.baseURL + Service.FoodCatalog + "?category=" + category.ToString();
dynamic results = await Service.getDataFromService(url).ConfigureAwait(false);
string json = results as string; // Otherwise error next line ???
Food items = JsonConvert.DeserializeObject<Food>(json);
return items;
}
Here is the Food class:
public struct FoodStruct
{
[JsonProperty(PropertyName = "FoodGroupTypeId")] public short? FoodGroupTypeId;
[JsonProperty(PropertyName = "FoodGroupDescription")] public string FoodGroupDescription;
[JsonProperty(PropertyName = "FoodId")] public int? FoodId;
[JsonProperty(PropertyName = "FoodDescription")] public string FoodDescription;
}
public class Food
{
[JsonProperty(PropertyName = "Table Selection")] public static List<FoodStruct> FoodList = new List<FoodStruct>();
public FoodStruct this[int key] { get { return FoodList[key]; } }
public static string[] ToStringArray()
{
string[] list = new string[FoodList.Count];
int i = 0;
foreach (FoodStruct fs in FoodList)
{
list[i++] = fs.FoodDescription;
}
return list;
}
public static implicit operator string(Food v)
{
throw new NotImplementedException();
}
}
The api has a task that connects to the url, gets the results, and returns the deserialized object as a class? Is that how this logic works?
The Food class looks like it does what I want it to. It looks like it creates a list of the food description (the food group, etc isn't terribly important yet). But I have no way of accessing that food list and I am really not completely sure this is doing what I want it to, but it seems that way.
Can someone correct me on the logic and help me figure out how to deserialize the object to put it in the UITableView?

Deserialize you response like below
public async Task<Food> FoodCatalog(int category)
{
string url = Service.baseURL + Service.FoodCatalog + "?category=" + category.ToString();
dynamic results = await Service.getDataFromService(url).ConfigureAwait(false);
string json = results as string; // Otherwise error next line ???
var items = JsonConvert.DeserializeObject<List<Food>>(json);
return items;
}
In your ViewController bind your UITableView
public async override void ViewDidLoad()
{
//Create your API class object & call foodCatalog method here
var items=await FoodCatalog(params)
//Bind your UITableView
mainListview.Source = new TableViewSource(items);
}
For more information about how to bind TableView visit this

You can use Newtonsoft.Json:
string foodJson = "[{\"FoodGroupTypeId\":\"apple\", \"FoodGroupDescription\":\"apple fruit\",\"FoodId\": \"Fuji Apple\",\"FoodDescription\": \"Fuji Apple\"}]";
var obj = (Newtonsoft.Json.Linq.JArray)JsonConvert.DeserializeObject(foodJson);
foreach (var ch in obj.Children())
{
string id = ch["FoodGroupTypeId"].ToString();
}

Get property value of object in an list

I want to get an property value from an object that is in a list and put it into textbox.text
Below i have an example of my code:
The object:
public class Incident
{
public int Incident_id { get; set; }
public string Description { get; set; }
public string Caller { get; set; }
}
Below is my code in my form class:
List<Incident> incidentById = new List<Incident>();
incidentById = db.GetIncidentById(ID);
when my list is filled i want to put the string Caller into an textbox somewhat like below:
textBoxCaller.Text = incidentById[1].Caller;
I'm stuck at this point so i hope someone can help me out.
Thanks!
EDIT:
public List<Incident> GetIncidentById(int id)
{
using (IDbConnection connection = new System.Data.SqlClient.SqlConnection(Helper.CnnVal("IncidentLog")))
{
var output = connection.Query<Incident> ($"select * from Incidents where Incident_id like #id", new { id = "%id%" }).ToList();
return output;
}
}

I wasn't passing the right value into my query
this did the trick!
What you want is $"select * from Incidents where Incident_id = #id", new { id }

do you want first value should go?
check like.
if(incidentById.Count>0)
{
textBoxCaller.Text = incidentById.First().Caller;
}
// or you can join all Caller in list like
if(incidentById.Count>0)
{
textBoxCaller.Text = string.join(",",incidentById.Select(x=>x.Caller));
}

The issue that you are facing is that you are trying to access the second element in the list when there are not two or more elements in the list. If you are trying to access the first element in the list, then you could do either
textBoxCaller.Text = incidentById[0].Caller;
or
textBoxCaller.Text = incidentById.First().Caller;
If you do in fact want the second element of the list, then you should be checking to verify that it's length is at least two:
if(incidentById.Count >= 2)
{
...
}
Finally, as mentioned in a comment, you should rename GetIncidentById to something that makes clear it is returning a list, like GetIncidentsById or something similar.

How to retrieve property from GameSparks inside Unity

I am going crazy... I am missing something and I can't see what?!?!
I have created a property called "GAME_SETTINGS" inside the gameSparks admin area and have included this in it:
{
"AppVersionIOS": 1,
"AppVersionAndroid": 1
}
I am then trying to retrieve it inside Unity like this:
new GameSparks.Api.Requests.GetPropertyRequest().SetPropertyShortCode("GAME_SETTINGS").Send((response) => {
if (!response.HasErrors) {
Debug.Log("Setting Achieved: "+response.JSONString);
} else {
Debug.Log("Error Getting Settings");
}
});
I can see that I am getting the settings in my Debug.Log:
Setting Achieved: {"#class":".GetPropertyResponse","property":{"AppVersionIOS":1,"AppVersionAndroid":1},"requestId":"XXXXXXXXXXXXXXX","scriptData":null}
My question is though... How do I get the properties AppVersionIOS and AppVersionAndroid inside an Dictionary so I can call on them from other scripts...
Really hoping for help in this matter and thanks in advance :-)

I actually work for GameSparks and noticed your question so set up an account to answer you.
The property values returned in the JSON are of nullable type : https://msdn.microsoft.com/en-us/library/1t3y8s4s.aspx
Best practice is to parse the values before they are cached in a Dictionary or otherwise.
The following code should allow you to get those properties, then you may store them in a dictionary as you see fit.
public void GetProperties()
{
new GameSparks.Api.Requests.GetPropertyRequest()
.SetPropertyShortCode("GAME_SETTINGS")
.Send((response) =>
{
if (!response.HasErrors)
{
print(response.JSONString);
int androidProperty = (int)response.Property.GetInt("AppVersionAndroid");
int IOSProperty = (int)response.Property.GetInt("AppVersionIOS");
print("AndroidProperty:" + androidProperty);
print("IOSProperty:" + IOSProperty);
}
else
{
Debug.LogWarning(response.JSONString);
}
});
}
Hopefully this solves your problem. If you have any other questions please feel free to head to our website and log a ticket with us.
Regards, Patrick.

Notice: This answer assumes that the API doesn't have a way of converting this into a nice object which you can easily manipulate / parse, so it converts it itself using some class. It's however very likely that your API offers such a function somewhere, so you'd be better be looking in the documentation again. I guess it's somewhere near https://api.gamesparks.net/#getpropertyrequest .
You have the JSON document already, all you have to do is parse it. That'd be easier in a JavaScript file than in C#, but you can also use the JsonUtils class there, see http://docs.unity3d.com/Manual/JSONSerialization.html . Let http://json2csharp.com/ convert that JSON to a class layout for you and you get
public class Property
{
public int AppVersionIOS { get; set; }
public int AppVersionAndroid { get; set; }
}
public class RootObject
{
public string __invalid_name__#class { get; set; }
public Property property { get; set; }
public string requestId { get; set; }
public object scriptData { get; set; }
}
Now just take the string and serialize it into an RootObject.
new GameSparks.Api.Requests.GetPropertyRequest().SetPropertyShortCode("GAME_SETTINGS").Send((response) => {
if (!response.HasErrors) {
Debug.Log("Setting Achieved: "+response.JSONString);
//Serialization
var info = JsonUtility.FromJson<RootObject>(response.JSONString);
//Print the AppVersionIOS property
Debug.Log("App Version iOS: " + info.Property.AppVersionIOS);
} else {
Debug.Log("Error Getting Settings");
}
});
You might need some mofication in the data types of your class (e.g. make object scriptData to string scriptData if there can be an actual string in it), but that should be it. Have fun.

How to properly convert returned JSON to C# class?

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.