項目準備

1.創建項目，選擇webapi。取消勾選使用控制器。創建minimal Api項目

2.創建成功後MinimalAPI的介面直接寫在program.cs中

3.引入nuget包：Masa.Contrib.Service.MinimalAPIs

MinimalAPI改造

1. 在program.cs中加入以下內容

將原有的

var app = builder.Build();

換成

var app = builder.Services.AddServices(builder);

2.自定義Service並繼承ServiceBase

1.我們創建的一個自定義service如下：

    public class UserService : ServiceBase {
        public UserService() : base() {
            App.MapGet("/api/weatherforecast", GetWeatherForecast);
        }
        public async Task<WeatherForecast[]> PostWeather() {
            return null;
        }
        public async Task< WeatherForecast[]> GetWeatherForecast() {
            var summaries = new[]
            {
                "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
            };
            var forecast = Enumerable.Range(1, 5).Select(index =>
        new WeatherForecast
        (
            DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
            Random.Shared.Next(-20, 55),
            summaries[Random.Shared.Next(summaries.Length)]
        ))
        .ToArray();
            return forecast;
        }

        public async Task<IResult> Register() {
            return Results.Ok("註冊成功");
        }
    }
    public record WeatherForecast(DateOnly Date, int TemperatureC, string? Summary) {
        public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
    }

2.構建成功，查看swagger

提問：為什麼我們只寫了一個app.MapGet,卻生成了三個介面

MASA MinimalAPI源碼解析：為什麼我們只寫了一個app.MapGet,卻生成了三個介面：https://note.raokun.top/archives/masaminimalapi-yuan-ma-jie-xi--wei-shen-me-wo-men-zhi-xie-le-yi-ge-appmapget-que-sheng-cheng-le-san-ge-jie-kou

閱讀如遇樣式問題，請前往個人博客瀏覽： https://note.raokun.top

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開源項目地址：https://github.com/firstsaofan/TerraMours