NET Documentation. Serializing JSON. Serialize an Object. Serialize a Collection. Serialize a Dictionary.

Serialize JSON to a file. Serialize with JsonConverters. Serialize a DataSet. Serialize Conditional Property. Deserialize an Object. Deserialize a Collection. Deserialize a Dictionary. Deserialize an Anonymous Type. Deserialize a DataSet. Deserialize with CustomCreationConverter. Deserialize JSON from a file. Populate an Object. ConstructorHandling setting.

ObjectCreationHandling setting. DefaultValueHandling setting. MissingMemberHandling setting. NullValueHandling setting. ReferenceLoopHandling setting. PreserveReferencesHandling setting. DateFormatHandling setting. DateTimeZoneHandling setting. TypeNameHandling setting. MetadataPropertyHandling setting. ContractResolver setting. TraceWriter setting. ErrorHandling setting. MaxDepth setting. Custom JsonConverter.

Custom IContractResolver. Custom ITraceWriter. Custom SerializationBinder.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

I have a class that has a default constructor and also an overloaded constructor that takes in a set of parameters.

These parameters match to fields on the object and are assigned on construction. At this point i need the default constructor for other purposes so i would like to keep it if i can. My Problem: If I remove the default constructor and pass in the JSON string, the object deserializes correctly and passes in the constructor parameters without any issues.

I end up getting back the object populated the way I would expect. However, as soon as I add the default constructor into the object, when i call JsonConvert. Another note. I wouldn't think this would matter since, like i mentioned, the deserialization works fine with no default constructor.

Net prefers to use the default parameterless constructor on an object if there is one. If there are multiple constructors and you want Json. Net to use a non-default one, then you can add the [JsonConstructor] attribute to the constructor that you want Json. Net to call.

It is important that the constructor parameter names match the corresponding property names of the JSON object ignoring case for this to work correctly. You do not necessarily have to have a constructor parameter for every property of the object, however. If you do not want to add attributes to your class or don't otherwise control the source code for the class you are trying to deserialize, then another alternative is to create a custom JsonConverter to instantiate and populate your object.

For example:. A bit late and not exactly suited here, but I'm gonna add my solution here, because my question had been closed as a duplicate of this one, and because this solution is completely different.

I needed a general way to instruct Json.

Deserialize an Object

NET to prefer the most specific constructor for a user defined struct type, so I can omit the JsonConstructor attributes which would add a dependency to the project where each such struct is defined. I've reverse engineered a bit and implemented a custom contract resolver where I've overridden the CreateObjectContract method to add my custom creation logic.

Based on some of the answers here, I have written a CustomConstructorResolver for use in a current project, and I thought it might help somebody else. The default behaviour of Newtonsoft.

Json is going to find the public constructors. If your default constructor is only used in containing class or the same assembly, you can reduce the access level to protected or internal so that Newtonsoft. Json will pick your desired public constructor.

jsonconverter deserialize

Learn more. Ask Question. Asked 6 years ago. Active 5 months ago. Viewed 96k times. Maybe this can help stackoverflow. Active Oldest Votes.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

Cannot deserialize the current JSON object e. Account]' because the type requires a JSON array e. NET type e. Path 'accounts. It's part of the Newtonsoft. Serialization namespace.

jsonconverter deserialize

If the property names are spelled differently, then you'll need to resort to using JsonProperty attributes to map property names. An array of items which is going to be mapped to the list is always enclosed in square brackets.

You could create a JsonConverter.

Google sheet to website

See here for an example thats similar to your question. The whole message indicates that it is possible to serialize to a List object, but the input must be a JSON list. This means that your JSON must contain. Along the lines of the accepted answer, if you have a JSON text sample you can plug it in to this converterselect your options and generate the C code.

That's not exactly what I had in mind. What do you do if you have a generic type to only be known at runtime? Learn more. Using JsonConvert. Asked 7 years, 10 months ago. Active 1 year, 1 month ago. Viewed k times. Having never worked with this DeserializeObject method before, I'm kind of stuck here. RAM 1, 1 1 gold badge 6 6 silver badges 21 21 bronze badges. Seems that I am late, but see my answer.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I am trying to extend the JSON. I am specifically looking for custom JsonConverter implementation to handle this. The documentation and examples around this are pretty sparse on the net. I can't seem to get the the overridden ReadJson method implementation in JsonConverter right. Using the standard CustomCreationConverterI was struggling to work how to generate the correct type Person or Employeebecause in order to determine this you need to analyse the JSON and there is no built in way to do this using the Create method.

I found a discussion thread pertaining to type conversion and it turned out to provide the answer. Here is a link: Type converting. What's required is to subclass JsonConverteroverriding the ReadJson method and creating a new abstract Create method which accepts a JObject. The overridden ReadJson method creates a JObject and invokes the Create method implemented by our derived converter classpassing in the JObject instance.

This JObject instance can then be analysed to determine the correct type by checking existence of certain fields. These values should be copied over before using the new JsonReader in serializer. This is the best I could come up with to fix some of the problems with the above implementation, but I still think there are some things being overlooked:.

Update I updated this to have a more explicit method that makes a copy of an existing reader. This just encapsulates the process of copying over individual JsonReader settings. Ideally this function would be maintained in the Newtonsoft library itself, but for now, you can use the following:. Just thought i would share a solution also based on this that works with the Knowntype attribute using reflectionhad to get derived class from any base class, solution can benefit from recursion to find the best matching class though i didn't need it in my case, matching is done by the type given to the converter if it has KnownTypes it will scan them all until it matches a type that has all the properties inside the json string, first one to match will be chosen.

The project JsonSubTypes implement a generic converter that handle this feature with the helps of attributes. This is an expansion to totem's answer. It does basically the same thing but the property matching is based on the serialized json object, not reflect the.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I am trying to extend the JSON.

I am specifically looking for custom JsonConverter implementation to handle this. The documentation and examples around this are pretty sparse on the net. I can't seem to get the the overridden ReadJson method implementation in JsonConverter right. Using the standard CustomCreationConverterI was struggling to work how to generate the correct type Person or Employeebecause in order to determine this you need to analyse the JSON and there is no built in way to do this using the Create method.

I found a discussion thread pertaining to type conversion and it turned out to provide the answer. Here is a link: Type converting. What's required is to subclass JsonConverteroverriding the ReadJson method and creating a new abstract Create method which accepts a JObject. The overridden ReadJson method creates a JObject and invokes the Create method implemented by our derived converter classpassing in the JObject instance. This JObject instance can then be analysed to determine the correct type by checking existence of certain fields.

These values should be copied over before using the new JsonReader in serializer. This is the best I could come up with to fix some of the problems with the above implementation, but I still think there are some things being overlooked:. Update I updated this to have a more explicit method that makes a copy of an existing reader.

This just encapsulates the process of copying over individual JsonReader settings. Ideally this function would be maintained in the Newtonsoft library itself, but for now, you can use the following:. Just thought i would share a solution also based on this that works with the Knowntype attribute using reflectionhad to get derived class from any base class, solution can benefit from recursion to find the best matching class though i didn't need it in my case, matching is done by the type given to the converter if it has KnownTypes it will scan them all until it matches a type that has all the properties inside the json string, first one to match will be chosen.

The project JsonSubTypes implement a generic converter that handle this feature with the helps of attributes. This is an expansion to totem's answer. It does basically the same thing but the property matching is based on the serialized json object, not reflect the. This is important if you're using [JsonProperty], using the CamelCasePropertyNamesContractResolver, or doing anything else that will cause the json to not match the.

As another variation on Totem's known type solution, you can use reflection to create a generic type resolver to avoid the need to use known type attributes. As long as your base class is abstract or an interface, the known types will be automatically determined rather than having to be decorated with known type attributes. Here's another solution that avoids the use of jObject.

Hard reset tcl a502dl

Deserialze method:. A lot of the times the implementation will exist in the same namespace as the interface. So, I came up with this:. Using the idea of totem and zlangnerI have created a KnownTypeConverter that will be able to determine the most appropriate inheritor, while taking into account that json data may not have optional elements.

So, the service sends a JSON response that contains an array of documents incoming and outgoing.

La frazione di bogolese nel comune di sorbolo

Documents have both a common set of elements and different ones. In this case, the elements related to the outgoing documents are optional and may be absent. In this regard, a base class Document was created that includes a common set of properties. The task was to create a converter that based on json data and information from KnownTypeAttribute will be able to determine the most appropriate class that allows you to save the largest amount of information received.

It should also be taken into account that json data may not have optional elements. To reduce the number of comparisons of json elements and properties of data models, I decided not to take into account the properties of the base class and to correlate with json elements only the properties of the inheritor classes.

jsonconverter deserialize

PS: In my case, if no one inheritor has not been selected by converter this can happen if the JSON data contains information only from the base class or the JSON data does not contain optional elements from the OutgoingDocumentthen an object of the OutgoingDocument class will be created, since it is listed first in the list of KnownTypeAttribute attributes.

At your request, you can vary the implementation of the KnownTypeConverter in this situation. How are we doing? Please help us improve Stack Overflow.NET Documentation.

jsonconverter deserialize

Serializing JSON. Serialize an Object. Serialize a Collection.

Deserializing different types based on properties, with Newtonsoft.Json

Serialize a Dictionary. Serialize JSON to a file. Serialize with JsonConverters. Serialize a DataSet. Serialize Conditional Property.

Applique discendente mirò

Deserialize an Object. Deserialize a Collection. Deserialize a Dictionary. Deserialize an Anonymous Type. Deserialize a DataSet. Deserialize with CustomCreationConverter. Deserialize JSON from a file. Populate an Object. ConstructorHandling setting. ObjectCreationHandling setting. DefaultValueHandling setting.

MissingMemberHandling setting. NullValueHandling setting. ReferenceLoopHandling setting. PreserveReferencesHandling setting. DateFormatHandling setting. DateTimeZoneHandling setting.During the development of the Auth0. If you did not pass in this parameter or specifeied a value of falseit would simply return an array of users.

To make this a bit more visual, here is an approximate example when you as the API call to include the totals:. So you can see that the API returns a JSON object with the paging information, and then a users property containing an array with the list of users. In the case where you ask to not include the totals, the API would simply return an array of users, e. Depending on whether they request paging information, the Paging property will contain the paging information.

As you can expect this creates problem when trying to deserialize the resulting JSON to a specific. Thankfully JSON. NET offers a solution by allowing you to create a custom converter which specifies how an object is serialized or deserialized.

The logic then is fairly simple; I simply check whether the JSON being serialized is an object or an array. Simple as that. NET Core projects, I am available for hire for freelance work.

March 06, The problem During the development of the Auth0. IsAssignableFrom objectType. Load reader ; if item [ "users" ]! Perhaps better to throw exception at this point? Next ASP. NET Core: No more worries about checking in secrets.