再尝.NET7 NativeAOT

今天迫不及地发表续集，因为上一回WebAPI项目的报错，得到了解决！废话不说，线上代码～

var builder = WebApplication.CreateBuilder(args);

var app = builder.Build();

app.UseHttpsRedirection();

var summaries = new[]
{
    "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
};

app.MapGet("/weatherforecast", () =>
{
var forecast = Enumerable.Range(1, 5).Select(index =>
   new WeatherForecast()
   {
       Date = DateTime.Now.AddDays(index),
       TemperatureC = Random.Shared.Next(-20, 55),
       Summary = summaries[Random.Shared.Next(summaries.Length)]
   })
    .ToArray();
return forecast;
})
.WithName("GetWeatherForecast");

app.Run();

public class WeatherForecast
{
    public DateTime Date { get; set; }
    public string Summary { get; set; }
    public int TemperatureC { get; set; }
    public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
}

下面开始划重点。昨天的代码因为用了record语法糖来封装WeatherForecast对象，结果编译成Native代码后Json序列化却不支持，引发报错。今天去掉把WeatherForecast声明换成class再试，竟然意外获得成功！

WebAPI项目测试成功

爬出这个坑我Get到的教训是：语法糖虽好但不能多吃，尤其想玩NativeAOT的时候！