Odtnhj

I am trying to deserialize JSON using the Json.NET library. JSON which I receive looks like:

 "responseHeader": 
 "zkConnected": true,
 "status": 0,
 "QTime": 2
 ,
 "suggest": 
 "mySuggester": 
 "Ext": 
 "numFound": 10,
 "suggestions": [
 
 "term": "Extra Community",
 "weight": 127,
 "payload": ""
 ,
 
 "term": "External Video block",
 "weight": 40,
 "payload": ""
 ,
 
 "term": "Migrate Extra",
 "weight": 9,
 "payload": ""
 
 ]
 
 
 

The problem is that the "Ext" that you can see in it is part of the parameter passed in the query string and will always be different. I want to get only the values assigned to the term "term".

I tried something like this, but unfortunately does not works:

public class AutocompleteResultsInfo

 public AutocompleteResultsInfo()
 
 this.Suggest = new Suggest();
 
 [JsonProperty("suggest")]
 public Suggest Suggest get; set; 


public class Suggest

 [JsonProperty("mySuggester")]
 public MySuggesterElement MySuggesterElement get; set; 


public struct MySuggesterElement

 public MySuggester MySuggester;
 public string JsonString;

 public static implicit operator MySuggesterElement(MySuggester MySuggester) =>new MySuggesterElement MySuggester = MySuggester ;
 public static implicit operator MySuggesterElement(string String) => new MySuggesterElement JsonString = String ;


public class MySuggester

 [JsonProperty("suggestions")]
 public Suggestions Suggestions get; set; 


public class Suggestions

 [JsonProperty("term")]
 public string Autocopmplete get; set; 


internal class SuggesterElementConverter : JsonConverter

 public override bool CanConvert(Type t)
 
 return t == typeof(MySuggesterElement) 

 public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
 
 switch (reader.TokenType)
 
 case JsonToken.String:
 case JsonToken.Date:
 var stringValue = serializer.Deserialize<string>(reader);
 return new MySuggesterElement JsonString = stringValue ;
 case JsonToken.StartObject:
 var objectValue = serializer.Deserialize<MySuggester>(reader);
 return new MySuggesterElement MySuggester = objectValue ;
 
 throw new Exception("Cannot unmarshal type MySuggesterElement");
 

 public override void WriteJson(JsonWriter writer, object untypedValue, JsonSerializer serializer)
 
 var value = (MySuggesterElement)untypedValue;
 if (value.JsonString != null)
 
 serializer.Serialize(writer, value.JsonString);
 return;
 
 if (value.MySuggester != null)
 
 serializer.Serialize(writer, value.MySuggester);
 return;
 
 throw new Exception("Cannot marshal type CollationElements");
 

 public static readonly SuggesterElementConverter Singleton = new SuggesterElementConverter();


public class AutocompleteConverter

 public static readonly JsonSerializerSettings Settings = new JsonSerializerSettings
 
 MetadataPropertyHandling = MetadataPropertyHandling.Ignore,
 DateParseHandling = DateParseHandling.None,
 Converters =
 
 SuggesterElementConverter.Singleton
 
 ;


var results = JsonConvert.DeserializeObject<AutocompleteResultsInfo>(resultJson, AutocompleteConverter.Settings);

Many thanks for your help.

Kind Regerds,
Wojciech

You could decode the "mySuggester" as a dictionary:
public class Suggest

public class Suggest

 [JsonProperty("mySuggester")]
 public Dictionary<string, MySuggester> MySuggester get; set; 

Then you'll be able to access the suggestions with the query string parameter:

var variablePropertyName = "Ext";

var result = JsonConvert.DeserializeObject<AutocompleteResultsInfo>(_json);

var suggestions = result.Suggest.MySuggester[variablePropertyName].Suggestions;

if you don't know the property name you could also look it up in the dictionary:

var variablePropertyName = result.Suggest.MySuggester.Keys.First();

Working example:
https://dotnetfiddle.net/GIKwLs

If you don't need to deserialize the whole json string you can use a JsonTextReader. Example:

private static IEnumerable<string> GetTerms(string json)

 using (JsonTextReader reader = new JsonTextReader(new StringReader(json)))
 
 while (reader.Read())
 
 if (reader.TokenType == JsonToken.PropertyName && reader.Value.Equals("term"))
 
 string term = reader.ReadAsString();

 yield return term;
 
 
 

Using the code:

string json = @"
 ""responseHeader"": 
 ""zkConnected"": true,
 ""status"": 0,
 ""QTime"": 2
 ,
 ""suggest"": 
 ""mySuggester"": 
 ""Ext"": 
 ""numFound"": 10,
 ""suggestions"": [
 
 ""term"": ""Extra Community"",
 ""weight"": 127,
 ""payload"": """"
 ,
 
 ""term"": ""External Video block"",
 ""weight"": 40,
 ""payload"": """"
 ,
 
 ""term"": ""Migrate Extra"",
 ""weight"": 9,
 ""payload"": """"
 
 ]
 
 
 
";

IEnumerable<string> terms = GetTerms(json);

foreach (string term in terms)

 Console.WriteLine(term);

If you only need the object containing the term, and nothing else,
you could work with the JSON values directly by using the JObject interface in JSON.Net.

var parsed = JObject.Parse(jsonString);
var usingLinq = (parsed["suggest"]["mySuggester"] as JObject)
 .Descendants()
 .OfType<JObject>()
 .Where(x => x.ContainsKey("term"));

var usingJsonPath = parsed.SelectTokens("$.suggest.mySuggester.*.*[?(@.term)]")
 .Cast<JObject>();