u202bروش دیگر نوشتن Model binderهای سفارشی در ASP.NET Core 7x با معرفی IParseable

[Route("[controller]")]
public class WeatherForecastController : ControllerBase
{
    private static readonly string[] Summaries =
    {
        "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy",
        "Hot", "Sweltering", "Scorching",
    };

    // /WeatherForecast/GetForecast2?from=1&to=3
    [HttpGet("[action]")]
    public IEnumerable<WeatherForecast> GetForecast2(Duration days)
    {
        return Enumerable.Range(days.From, days.To)
                         .Select(index => new WeatherForecast
                                          {
                                              Date = DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
                                              TemperatureC = Random.Shared.Next(-20, 55),
                                              Summary = Summaries[Random.Shared.Next(Summaries.Length)],
                                          })
                         .ToArray();
    }
}

public class Duration
{
    public int From { get; set; }
    public int To { get; set; }
}

public class WeatherForecast
{
    public DateOnly Date { get; set; }

    public int TemperatureC { get; set; }

    public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);

    public string? Summary { get; set; }
}

// /WeatherForecast/GetForecast3/1-3
[HttpGet("[action]/{days}")]
public IEnumerable<WeatherForecast> GetForecast3(Days days)
    {
        return Enumerable.Range(days.From, days.To)
                         .Select(index => new WeatherForecast
                                          {
                                              Date = DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
                                              TemperatureC = Random.Shared.Next(-20, 55),
                                              Summary = Summaries[Random.Shared.Next(Summaries.Length)],
                                          })
                         .ToArray();
    }

using System.Diagnostics.CodeAnalysis;
using System.Globalization;

namespace NET7Mvc.Models;

public class Days : IParsable<Days>
{
    public Days(int from, int to)
    {
        From = from;
        To = to;
    }

    public int From { get; }
    public int To { get; }

    public static bool TryParse([NotNullWhen(true)] string? value,
                                IFormatProvider? provider,
                                [MaybeNullWhen(false)] out Days result)
    {
        var items = value?.Split('-', StringSplitOptions.RemoveEmptyEntries);
        if (items is { Length: 2 })
        {
            if (int.TryParse(items[0], NumberStyles.None, provider, out var from)
                && int.TryParse(items[1], NumberStyles.None, provider, out var to))
            {
                result = new Days(from, to);
                return true;
            }
        }

        result = default;
        return false;
    }

    public static Days Parse(string value, IFormatProvider? provider)
    {
        if (!TryParse(value, provider, out var result))
        {
            throw new ArgumentException("Could not parse the given value.", nameof(value));
        }

        return result;
    }
}