I'm quite new to JSON and would like to ask your help.
I'm trying to deserialize Json into a object class but whenever I call JavaScriptSerializer.Deserialize I get this error:
Error: 0x1 at Data Flow Task, Error Getting Data From Webservice!:
System.MissingMethodException: No parameterless constructor defined
for type of 'CurrencyOut[]'. at
System.Web.Script.Serialization.ObjectConverter.ConvertDictionaryToObject(IDictionary`2
dictionary, Type type, JavaScriptSerializer serializer, Boolean
throwOnError, Object& convertedObject)
Here's the Json source:
{"terms":"http://www.xe.com/privacy.php","privacy":"http://www.xe.com/legal/dfs.php","to":"IDR","amount":100.0,"timestamp":"2015-06-01T16:00:00Z","from":[{"quotecurrency":"USD","mid":0.0075713171}]}
Here's my class:
class CurrencyOut
{
public string Tems { get; set; }
public string Privacy { get; set; }
public CurrArr From { get; set; }
public decimal Amount { get; set; }
public DateTime Timestamp { get; set; }
public string To { get; set; }
}
class CurrArr
{
public string QuoteCurrency { get; set; }
public decimal Mid { get; set; }
}
Thanks
Related
I'm trying to deserialize some statistics in JSON format from valve's API. The code below doesn't throw any exceptions when deserializing, only when trying to use the statistics afterwards. None of the statistics have a value after deserialization. Valve's response looks like this:
"playerstats":{
"steamID":"",
"gameName":"",
"stats":[
{
"name":"deaths",
"value":5062
}, etc etc..
This is my Rust class (Rust being the game I'm getting statistics from.):
public class Rust
{
public int steamID { get; set; }
public string gameName { get; set; }
public Array stats { get; set; }
}
And this is the deserialization code:
Rust getStats = JsonConvert.DeserializeObject<Rust>(str);
foreach (var stat in getStats.stats) //< ----- Exception: Object reference not set to an instance of an object.
{
parsed += stat.ToString();
}
'parsed' is then returned and used to print out all statistics and 'str' is the json response from Valve. I pasted the entire JSON response on pastebin in-case the above data isn't enough: https://pastebin.com/uJZSTF3G
I've tried naming some of the statistics individually in the Rust class instead of using an Array.
I expect the output to show all of the deserialized statistics for example in a console.
As #Bagus Tesa suggested, try something like...
public class Rust
{
public int steamID { get; set; }
public string gameName { get; set; }
public List<RustStat> stats { get; set; }
}
public class RustStat
{
public string name { get; set; }
public string value { get; set; }
}
Edit
I changed the steamID property to string and added the full code below. This compiled for me successfully. Hope this helps!
public class Valve
{
public Rust playerstats { get; set; }
}
public class Rust
{
public string steamID { get; set; }
public string gameName { get; set; }
public List<RustStat> stats { get; set; }
}
public class RustStat
{
public string name { get; set; }
public string value { get; set; }
}
Valve valve = JsonConvert.DeserializeObject<Valve>(str);
foreach (RustStat stat in valve.playerstats.stats)
{
}
I am trying to deserialize this link , but I keep getting this error.
Error reading string. Unexpected token: StartObject. Path 'responseData'.
From what i have googled, the problem seems to be the setup of my object I'm trying to deserialize into. Below is my class:
public class FeedSearchResult
{
[JsonProperty("responseData")]
public String ResponseData { get; set; }
[JsonProperty("query")]
public String Query { get; set; }
[JsonProperty("entries")]
public string[] Entries { get; set; }
[JsonProperty("responseDetails")]
public object ResponseDetails { get; set; }
[JsonProperty("responseStatus")]
public String ResponseStatsu { get; set; }
}
public class ResultItem
{
[JsonProperty("title")]
public String Title { get; set; }
[JsonProperty("url")]
public String Url { get; set; }
[JsonProperty("link")]
public String Link { get; set; }
}
What am I doing wrong in my class? Any help would be greatly appreciated.
Your data model only has two levels of nesting, but the JSON returned has three. If you look at the formatted JSON using https://jsonformatter.curiousconcept.com/ you will see:
{
"responseData":{
"query":"Official Google Blogs",
"entries":[
{
"url":"https://googleblog.blogspot.com/feeds/posts/default",
"title":"\u003cb\u003eOfficial Google Blog\u003c/b\u003e",
"contentSnippet":"\u003cb\u003eOfficial\u003c/b\u003e weblog, with news of new products, events and glimpses of life inside \u003cbr\u003e\n\u003cb\u003eGoogle\u003c/b\u003e.",
"link":"https://googleblog.blogspot.com/"
},
In particular your data model has responseData as a String when it needs to be a contained object. This is the specific cause of the exception.
If you upload the JSON to http://json2csharp.com/ you will get the following data model, which can be used to deserialize this JSON:
public class ResultItem
{
public string url { get; set; }
public string title { get; set; }
public string contentSnippet { get; set; }
public string link { get; set; }
}
public class ResponseData
{
public string query { get; set; }
public List<ResultItem> entries { get; set; }
}
public class RootObject
{
public ResponseData responseData { get; set; }
//Omitted since type is unclear.
//public object responseDetails { get; set; }
public int responseStatus { get; set; }
}
https://opendata.miamidade.gov/Corrections/Jail-Bookings-May-29-2015-to-current/7nhc-4yqn?
I don't if someone could help me with this: I've been having problems parsing/de-serializing the Address information that comes inside the Location object.
This is a fragment of the code i am using:
var results = dataset.Query<MiamiDade_JailLog>(soql);
public class MiamiDade_JailLog
{
public string chargecode3 { get; set; }
public string charge2 { get; set; }
public string bookdate { get; set; }
public string charge3 { get; set; }
public string chargecode1 { get; set; }
public string chargecode2 { get; set; }
public string charge1 { get; set; }
public string dob { get; set; }
public Location1 location_1 { get; set; }
public string defendant { get; set; }
}
public class Location1
{
public bool needs_recoding { get; set; }
public string longitude { get; set; }
public string latitude { get; set; }
public HumanAddress human_address { get; set; }
}
public class HumanAddress
{
public string address { get; set; }
public string city { get; set; }
public string state { get; set; }
public string zip { get; set; }
}
and this is the error message:
Error converting value
"{"address":"HOMELESS","city":"MIAMI","state":"FL","zip":""}" to type
'JailLog_WFA.HumanAddress'. Path 'location_1.human_address', line 1,
position 424.
This is the response I got from Socrata:
If you look at this json response, https://opendata.miamidade.gov/resource/7nhc-4yqn.json
You'll see that for the location_1 column, we provide an object, {}
and then within there you'll see human_address which we provide as a string "" instead of as an object.
For JavaScript, it would just be JSON.parse("{\"address\":\"17725 NW 8TH PL\",\"city\":\"MIAMI GARDENS\",\"state\":\"FL\",\"zip\":\"33169\"}");
From the code you sent, it looks like you are treating HumanAddress as an object instead of as a string that needs to be parsed into an object.
If you make this change it should work.
...And this was my response:
You gave me very good info. However I had already done a workaround to parse the object.
I just removed the extra quotes from the human_ address object and was able to parse everything at once.
Can anyone help me to parse this JSON into an object IN C# 4.0. I have spent the last two days trying.
I have JSON.NET and several other peoples suggestions to no avail.
I thought it would be best just to give the JSON sample and to ask for your suggestions.
{
"message-count":"1",
"messages":[
{"to":"441234567890",
"messageprice":"0.02900000",
"status":"0",
"messageid":"030000001DFE2CB1",
"remainingbalance":"1.56500000",
"network":"23433"}
]
}
Many thanks,
Adrian
p.s Their is some nice code here, if you want to use github. https://github.com/lukesampson/HastyAPI.Nexmo
I will cheat and create C# classes quickly using this tool: http://json2csharp.com/ (or just discovered http://jsonclassgenerator.codeplex.com/)
Then I change C# classes to my liking
public class MessagesJSON
{
public int MessageCount { get; set; }
public List<Message> Messages { get; set; }
}
public class Message
{
public string To { get; set; }
public double MessagePrice { get; set; }
public int Status { get; set; }
public string MessageId { get; set; }
public double RemainingBalance { get; set; }
public string Network { get; set; }
}
MessagesJSON is just a name I made that represents the JSON object that you are passing to C#.
I pass the JSON string from the client, e.g.
{\"MessageCount\":1,\"Messages\":[{\"To\":\"441234567890\",\"MessagePrice\":0.029,\"Status\":0,\"MessageId\":\"030000001DFE2CB1\",\"RemainingBalance\":1.565,\"Network\":\"23433\"}]
Then I can use JSON.NET to convert JSON to C# objects:
public void YourMethod(MessagesJSON json) {
var result = JsonConvert.DeserializeObject<MessagesJSON>(json);
}
Here's the result:
Watch out for capitalisation.
If you want to use lower-case JSON keys only, change the C# classes to lower-case, e.g. public double messageprice { get; set; }
C# classes:
public class MessagesJSON
{
public int message_count { get; set; }
public List<Message> messages { get; set; }
}
public class Message
{
public string to { get; set; }
public string messageprice { get; set; }
public string status { get; set; }
public string messageid { get; set; }
public string remainingbalance { get; set; }
public string network { get; set; }
}
This is as close to your JSON as you want:
{\"message_count\":1,\"messages\":[{\"to\":\"441234567890\",\"messageprice\":\"0.02900000\",\"status\":\"0\",\"messageid\":\"030000001DFE2CB1\",\"remainingbalance\":\"1.56500000\",\"network\":\"23433\"}]}
or use one of these solutions if you really like CamelCasing:
CamelCase only if PropertyName not explicitly set in Json.Net?
JObject & CamelCase conversion with JSON.Net
I myself prefer attributes
public class Message
{
[JsonProperty("to")]
public string To { get; set; }
[JsonProperty("messageprice")]
public string MessagePrice { get; set; }
[JsonProperty("status")]
public string Status { get; set; }
[JsonProperty("messageid")]
public string MessageId { get; set; }
[JsonProperty("remainingbalance")]
public string RemainingBalance { get; set; }
[JsonProperty("network")]
public string Network { get; set; }
}
Pass your string:
"{\"message_count\":1,\"messages\":[{\"to\":\"441234567890\",\"messageprice\":\"0.02900000\",\"status\":\"0\",\"messageid\":\"030000001DFE2CB1\",\"remainingbalance\":\"1.56500000\",\"network\":\"23433\"}]}"
but get the pretty C# property names:
Create objects with the same structure as the json and call.
JsonConvert.DeserializeObject<Entity>(json);
Edit. You have to use JSON.NET if u wanna do it this way.
I am having some issues DeSerializing the following Json, it runs, throws no errors however the props in the class are all null so it is obviously not working.
{ "realms":[ { "type":"pve", "queue":false, "status":true, "population":"medium", "name":"Malfurion", "slug":"malfurion" } ] }
The above JSON is the jsonResult string so string jsonResult = the above JSON
My code:
public class Realm
{
public string type { get; set; }
public bool queue { get; set; }
public bool status { get; set; }
public string population { get; set; }
public string name { get; set; }
public string slug { get; set; }
}
var realm = javaScriptSerializer.Deserialize<Realm>(jsonResult);
There are no props in the object because the object contains a single array with a single object in the array.