C# Json Examples

C# Basic

C# Data Type

C# OOP

C# IO

C# Graphics & UI

C# Advanced

Ignore object property during Json serialization in C#

To ignore a specific object property during JSON serialization using Json.NET, you can use the JsonIgnore attribute. You can apply this attribute to the property that you want to ignore, and the property will be excluded from the resulting JSON. Here's an example:

public class Person {
    public string Name { get; set; }
    
    [JsonIgnore]
    public int Age { get; set; }
}

In this example, the Age property will be ignored during serialization, and won't be included in the resulting JSON.

To ignore a get-only property during JSON serialization using Json.NET, you can use the JsonProperty attribute with the DefaultValueHandling option set to Ignore. Here's an example:

public class Person {
    public string Name { get; set; }
    
    [JsonProperty(DefaultValueHandling = DefaultValueHandling.Ignore)]
    public int Age { get; }
}

In this example, the Age property is a get-only property, but it will be ignored during serialization, and won't be included in the resulting JSON.

C# JSON serialization ignore property:
- Basic example of ignoring a property during JSON serialization.
- Code snippet:
```
public class Person
{
    public string Name { get; set; }
    [JsonIgnore]
    public int Age { get; set; }
}
```
Json.NET ignore property during serialization C#:
- Using Json.NET to ignore a property during serialization.
- Code snippet:
```
public class Person
{
    public string Name { get; set; }
    [JsonIgnore]
    public int Age { get; set; }
}
```

IgnoreDataMember attribute in C# JSON serialization:

Applying IgnoreDataMember attribute for excluding a property during serialization.

Code snippet:

[DataContract]
public class Person
{
    [DataMember]
    public string Name { get; set; }
    [IgnoreDataMember]
    public int Age { get; set; }
}

JsonIgnore attribute usage in C# JSON serialization:
- Utilizing JsonIgnore attribute for excluding a property during serialization.
- Code snippet:
```
public class Person
{
    public string Name { get; set; }
    [JsonIgnore]
    public int Age { get; set; }
}
```

C# NewtonSoft.Json conditional property serialization:

Conditionally excluding a property during JSON serialization using a custom condition.

Code snippet:

public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
    [JsonIgnore]
    public bool ShouldSerializeAge() => Age > 18;
}

Ignoring properties during JSON serialization in C#:

Ignoring multiple properties during JSON serialization.

Code snippet:

public class Person
{
    public string Name { get; set; }
    [JsonIgnore]
    public int Age { get; set; }
    [JsonIgnore]
    public string Address { get; set; }
}

C# JsonIgnoreCondition attribute example:

Using JsonIgnoreCondition attribute for conditional property exclusion.

Code snippet:

public class Person
{
    public string Name { get; set; }
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string Address { get; set; }
}

JsonIgnoreProperty attribute in C# JSON serialization:
- Applying JsonIgnoreProperty attribute for property exclusion during serialization.
- Code snippet:
```
public class Person
{
    public string Name { get; set; }
    [JsonIgnoreProperty]
    public int Age { get; set; }
}
```

How to exclude a property from JSON serialization in C#:

Manually excluding a property from JSON serialization based on a condition.

Code snippet:

public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }

    public bool ShouldSerializeAge() => Age > 18;
}

JsonConverter to ignore property in C# serialization:

Implementing a custom JsonConverter to exclude a property during serialization.

Code snippet:

public class PersonConverter : JsonConverter<Person>
{
    public override void WriteJson(JsonWriter writer, Person value, JsonSerializer serializer)
    {
        JObject obj = JObject.FromObject(value);
        obj.Remove("Age");
        obj.WriteTo(writer);
    }

    // Other methods for deserialization
}

C# JSON serialization exclude property by name:

Dynamically excluding a property from JSON serialization by name.

Code snippet:

public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
}

var person = new Person { Name = "John", Age = 25 };
var jsonSettings = new JsonSerializerSettings { ContractResolver = new ExcludePropertyContractResolver("Age") };
string jsonString = JsonConvert.SerializeObject(person, jsonSettings);

Conditional property serialization in C# JSON:
- Using a custom ShouldSerialize method for conditional property exclusion during serialization.
- Code snippet:
```
public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }

    public bool ShouldSerializeAge() => Age > 18;
}
```

Ignoring null values during JSON serialization in C#:

Configuring Json.NET to ignore properties with null values during serialization.

Code snippet:

public class Person
{
    public string Name { get; set; }
    public int? Age { get; set; }
}

var person = new Person { Name = "John", Age = null };
string jsonString = JsonConvert.SerializeObject(person, new JsonSerializerSettings { NullValueHandling = NullValueHandling.Ignore });

Custom contract resolver for ignoring properties in C# JSON serialization:

Implementing a custom contract resolver for property exclusion during serialization.

Code snippet:

public class IgnorePropertyContractResolver : DefaultContractResolver
{
    private readonly string[] _propertyNamesToIgnore;

    public IgnorePropertyContractResolver(params string[] propertyNamesToIgnore)
    {
        _propertyNamesToIgnore = propertyNamesToIgnore;
    }

    protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)
    {
        return base.CreateProperties(type, memberSerialization)
            .Where(p => !_propertyNamesToIgnore.Contains(p.PropertyName))
            .ToList();
    }
}

Newtonsoft.Json.JsonProperty attribute in C#:

Using JsonProperty attribute for fine-grained control over property serialization.

Code snippet:

public class Person
{
    public string Name { get; set; }

    [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
    public int? Age { get; set; }
}

C# JSON serialization conditional ignore property:

Applying a condition to ignore a property during JSON serialization.

Code snippet:

public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
    public bool ShouldSerializeAge() => Age > 18;
}

Using ShouldSerialize method for property exclusion in C# JSON serialization:
- Applying ShouldSerialize method for conditionally excluding a property during serialization.
- Code snippet:
```
public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
    public bool ShouldSerializeAge() => Age > 18;
}
```

Exclude property from JSON serialization based on a condition in C#:

Applying a custom condition to exclude a property from JSON serialization.

Code snippet:

public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
}

var person = new Person { Name = "John", Age = 25 };
var jsonSettings = new JsonSerializerSettings
{
    ContractResolver = new ShouldSerializeContractResolver<Person>(p => p.Age > 18)
};
string jsonString = JsonConvert.SerializeObject(person, jsonSettings);

Ignore specific properties during JSON.NET serialization in C#:

Excluding specific properties from JSON.NET serialization using a custom contract resolver.

Code snippet:

public class Person
{
    public string Name { get; set; }
    public int Age { get; set; }
}

var person = new Person { Name = "John", Age = 25 };
var jsonSettings = new JsonSerializerSettings
{
    ContractResolver = new ShouldSerializeContractResolver<Person>(p => p.Age > 18)
};
string jsonString = JsonConvert.SerializeObject(person, jsonSettings);

Conditional serialization using DataContractJsonSerializer in C#:

Using DataContractJsonSerializer with ShouldSerialize method for conditional property exclusion.

Code snippet:

[DataContract]
public class Person
{
    [DataMember]
    public string Name { get; set; }

    [DataMember]
    public int Age { get; set; }

    public bool ShouldSerializeAge() => Age > 18;
}