json.net required property not found in json

jsonproperty(required = true vs notnull)
json required
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.net json required
newtonsoft json
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required.default json
c# json to object

I am using Json.net, I got a class as following

public class RecordAlias
    {   
        [JsonProperty(PropertyName = "eId", Required = Required.Always)]
        public string EntityId { get; set; }

        [JsonProperty(PropertyName = "aId", Required = Required.AllowNull)]
        public string AliasId { get; set; }

        [JsonProperty(PropertyName = "iSd", Required = Required.AllowNull)]
        public bool IsSelected { get; set; }
    }

So that following json can be deserialized even through some items don't have property "iSd" in json string, I would expect a default value of that type should be populated if not present, for example, IsSelected should be false except last item

      [{
        "eId" : "30022004",
        "aId" : "1"
    }, {
        "eId" : "30021841",
        "aId" : "1"
    }, {
        "eId" : "30021848",
        "aId" : "1"
        "iSd" : true
    }
]

Any idea how can I achieve this?


You're not specifying eId in your JSON string, and it's set to be required. You're passing rId...is this the same thing?

If I'm not understanding the question, please let me know and I'll update my answer.

UPDATE: You're indicating that the iSd property is AllowNull. You still have to specify a value for this property in your JSON string, but it can be null. Per the JSON.NET specs:

The property must be defined in JSON but can be a null value.

You need to specify a value for iSd...or mark iSd in your JsonProperty attribute as DefaultValue. For DefaultValue, the spec says:

The property is not required. The default state.

[JsonProperty(PropertyName = "iSd", Required = Required.Default)]
public bool IsSelected { get; set; }

I hope this helps.

JsonPropertyAttribute required, Json.JsonPropertyAttribute to set T:Newtonsoft.Json.Required which is used during deserialization to validate the presence of required JSON properties. Json.NET Documentation. JsonProperty Required Property Gets or sets a value indicating whether this JsonProperty is required.


Make the property a bool not a string.

Required Enumeration, The property is not required. The default state. AllowNull, 1, The property must be defined in JSON but can be a null value. Hi all, I've seen other threads about this, and the usual solution is to update to the latest version of power bi, but there doesn't seem to be any version newer than the one I have. I am unable to open some power bi files created by a coworker on Friday, and I get the following message: Anyo


I made a little table for the Required enum values and their effect based on the Required documentation:

                       | Must be present | Can be Null value
-----------------------+-----------------+------------------
Required.Default       |                 |         ✓    
-----------------------+-----------------+------------------
Required.AllowNull     |        ✓        |         ✓    
-----------------------+-----------------+------------------
Required.Always        |        ✓        |            
-----------------------+-----------------+------------------
Required.DisallowNull  |                 |          

In your case the isD is optional you should have used Required.Default (or Required.DisallowNull). Using Required.AllowNull also makes the isD mandatory and it thus throws the Exception when it's missing.

Note that in this case it makes no sense to differentiate between "Optional and may be null" (Required.Default) or "Optional but may not be null" (Required.DisallowNull) because bool is a value type that cannot be null. If you wanted to allow null values you need to use a nullable value type (bool?), however then the default value (when the value is not present) would be null, except when you set it manually (for example to false):

[JsonProperty(PropertyName = "iSd", Required = Required.Default)]
public bool? IsSelected { get; set; } = false;

How to mark certain property as required in json content · Issue , How to mark certain property as required in json content #1618. Open Still it's not working: Note: I am using Newtonsoft.Json version 11.0.1  JsonIgnore is required to specify that the FullName property should not be serialized to the json representation. To ignore the property during deserialization we need to add the JsonProperty annotation with Required = Required.Default (which means not required). So, this is how to avoid the JsonSerializationException :


JsonSerializationException: 'Required property 'properties' not found , JsonSerializationException: 'Required property 'properties' not found in JSON #​131. Open. tuyen-vuduc opened this issue on Sep 20, 2019 · 0 comments. Open​  Indicating whether a property is required. The property is not required. The property must be defined in JSON but can be a null value. The property must be defined in JSON and cannot be a null value. The property is not required but it cannot be a null value.


Migrate from Newtonsoft.Json to System.Text.Json, Json.NET allows you to query JSON by JsonPath, so one option is to manually query the JSON, find data you need and assign it to your C# object. it might not work as property could start with capital letter, but JSON itself to  This sample uses T:Newtonsoft.Json.JsonPropertyAttribute to set T:Newtonsoft.Json.Required which is used during deserialization to validate the presence of required JSON properties.


Partial JSON deserialize by JsonPath with Json.NET – Automation , JsonSerializationException: Required property 'ColorName' not found in JSON. Path '', line 1, position 51.] at Newtonsoft.Json.Serialization. Newtonsoft.Json.JsonSerializationException: Required property 'user_id' not found in JSON. Is this because the JSON object is an array? If so, how can I deserialize it to the one User object? Thanks in advance!