JavaScriptSerializer - JSON serialization of enum as string in C#

JavaScriptSerializer - JSON serialization of enum as string in C#

By default, when you serialize an enum in C# using the JavaScriptSerializer class, it will be converted to its underlying integer value. However, if you want to serialize the enum as a string instead, you can use the StringEnumConverter class provided by the Newtonsoft.Json library (also known as Json.NET). Here's an example:

using System.Web.Script.Serialization;
using Newtonsoft.Json;
using Newtonsoft.Json.Converters;

public enum Fruit
{
    Apple,
    Banana,
    Cherry
}

public class FruitBasket
{
    public int Id { get; set; }
    [JsonConverter(typeof(StringEnumConverter))]
    public Fruit FavoriteFruit { get; set; }
}

class Program
{
    static void Main(string[] args)
    {
        FruitBasket basket = new FruitBasket()
        {
            Id = 1,
            FavoriteFruit = Fruit.Banana
        };

        JavaScriptSerializer serializer = new JavaScriptSerializer();
        string json = JsonConvert.SerializeObject(basket);

        Console.WriteLine(json);
    }
}

In this example, we define an enum called Fruit and a class called FruitBasket that has an Id property and a FavoriteFruit property of type Fruit. We then mark the FavoriteFruit property with the StringEnumConverter attribute provided by Json.NET.

Finally, in the Main method, we create a new instance of FruitBasket, set its properties, and then use the JsonConvert.SerializeObject method to serialize the object to JSON. The StringEnumConverter attribute causes the Fruit value to be serialized as a string instead of an integer.

The resulting JSON output should look something like this:

{"Id":1,"FavoriteFruit":"Banana"}

Examples

  1. "C# JavaScriptSerializer serialize enum as string"

    • Description: Developers may be looking for ways to ensure that an enum is serialized as a string rather than an integer using JavaScriptSerializer in C#.
    // C# Code
[JsonConverter(typeof(StringEnumConverter))]
public enum MyEnum { Value1, Value2, Value3 }

  2. "JavaScriptSerializer serialize enum as string with custom attribute in C#"

    • Description: Users may seek a solution to serialize an enum as a string using a custom attribute in conjunction with JavaScriptSerializer in C#.
    // C# Code
[JsonEnumStringValue("stringValue")]
public enum MyEnum { Value1, Value2, Value3 }

  3. "C# JavaScriptSerializer enum string serialization globally"

    • Description: This query addresses setting up a global configuration for JavaScriptSerializer to serialize all enums as strings.
    // C# Code (in global configuration or startup)
JavaScriptSerializer.DefaultSerializer.RegisterConverters(new[] { new StringEnumConverter() });

  4. "JavaScriptSerializer serialize enum with camelCase string values in C#"

    • Description: Developers may be interested in serializing an enum with camelCase string values using JavaScriptSerializer in C#.
    // C# Code
[JsonEnumCaseTransform(EnumCaseTransform.CamelCase)]
public enum MyEnum { Value1, Value2, Value3 }

  5. "Custom JavaScriptSerializer enum serialization logic in C#"

    • Description: This query is about implementing custom logic for enum serialization using JavaScriptSerializer in C#.
    // C# Code (using a custom converter)
JavaScriptSerializer.DefaultSerializer.RegisterConverters(new[] { new CustomEnumConverter() });

  6. "C# JavaScriptSerializer serialize enum as integer globally"

    • Description: Users might seek a solution to globally configure JavaScriptSerializer to serialize all enums as integers.
    // C# Code (in global configuration or startup)
JavaScriptSerializer.DefaultSerializer.RegisterConverters(new[] { new IntegerEnumConverter() });

  7. "JavaScriptSerializer serialize enum as string with attribute and custom logic in C#"

    • Description: Developers may want to combine attribute-based serialization and custom logic for certain enum values using JavaScriptSerializer in C#.
    // C# Code
[JsonEnumStringValue("stringValue", SpecialHandling = true)]
public enum MyEnum { Value1, Value2, Value3 }

  8. "C# JavaScriptSerializer enum serialization with custom naming strategy"

    • Description: This query focuses on using a custom naming strategy for enum serialization with JavaScriptSerializer in C#.
    // C# Code (using a custom naming strategy)
JavaScriptSerializer.DefaultSerializer.RegisterConverters(new[] { new CustomEnumNamingStrategy() });

  9. "JavaScriptSerializer serialize enum as string only for certain properties in C#"

    • Description: Users may be interested in selectively serializing certain enum properties as strings using JavaScriptSerializer in C#.
    // C# Code (using [JsonConverter] attribute on specific property)
[JsonConverter(typeof(StringEnumConverter))]
public MyEnum EnumProperty { get; set; }

  10. "C# JavaScriptSerializer serialize enum with custom string values"

    • Description: This query is about defining custom string values for enum members during serialization with JavaScriptSerializer in C#.
    // C# Code
[JsonEnumStringValue("CustomValue1")]
public enum MyEnum { Value1, Value2, Value3 }

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