ByXmlSerializer

Formatter which allows mixed use of XmlSerializer, DataContractSerializer, and JsonSerializer. Each action can "opt-in" to XmlSerializer by returning ByXmlSerializer<T> (or ActionResult<ByXmlSerializer<T>> et alia).

Example use

Add a reference in csproj:

<ItemGroup>
    <PackageReference Include="Rmg.AspNetCore.ByXmlSerializer" Version="1.0.0" />
</ItemGroup>

Enable the formatter by adding it before adding DCS in Program.cs:

using Rmg.AspNetCore;

// ...snip...

builder.Services.AddControllers()
    .AddByXmlSerializerFormatters()
    .AddXmlDataContractSerializerFormatters();

// ...snip...

"Mark" specific actions as preferring XmlSerializer by returning or accepting ByXmlSerializer<T>:

[HttpGet("xs1")]
public ByXmlSerializer<WeatherForecast> GetExample1()
{
    // ByXmlSerializer<T> is implicitly creatable from T
    return new WeatherForecast();
}

[HttpGet("xs2")]
public ActionResult<ByXmlSerializer<WeatherForecast>> GetExample2()
{
    // or use an extension method on ControllerBase to coerce type
    return this.ByXmlSerailizer(new WeatherForecast());
}

[HttpGet("xs3")]
public ActionResult<ByXmlSerializer<WeatherForecast>> GetExample3()
{
    // or explicitly construct
    return StatusCode(400, new ByXmlSerializer<WeatherForecast>(new ()));
}

[HttpPost("pe1")]
public ByXmlSerializer<WeatherForecast> PostExample1([FromBody] ByXmlSerializer<ForecastArea> area)
{
    // ByXmlSerializer<T> is implicitly unwrappable to T
    ForecastArea unwrappedArea = area;
    return new WeatherForecast(unwrappedArea);
}

[HttpPost("pe2")]
public ByXmlSerializer<WeatherForecast> GetExample5([FromBody] ByXmlSerializer<ForecastArea> area)
{
    // or use .Value directly
    return new WeatherForecast(area.Value);
}

Methods marked with ByXmlSerializer<T> can still use other formatters (e.g.: System.Text.Json) without issue. Only formatters which also read text/xml or application/xml are superseded.