ASP.Net Core 6 WebApi 例子中的路由在哪里？

Question

我刚刚开始研究 webApi 核心 6 和天气预报示例。我正在使用 Postman 并在 Program.cs 中注释掉了 Swagger 和 SwaggerUI，URL https://localhost:7192/WeatherForecast 有效，所以我假设 'WeatherForecast' 是控制器名称它默认为 Get() 的 httpGet 方法？但我正在尝试查找路由，因为 HttpGet 的属性名称为“GetWeatherForecast”，这在邮递员中不起作用。

现在，我添加了第二个 Get 方法，只是为了看看它是如何被命中的，如下所示，但是当我使用上面的 URL 时它说错误 'AmbiguousMatchException: The request matched multiple endpoints. Matches: ... '，但是使用 'GetBlah' 和 'GetTest' 都不行，那么路由是如何映射的呢？

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

    private readonly ILogger<WeatherForecastController> _logger;

    public WeatherForecastController(ILogger<WeatherForecastController> logger)
    {
        _logger = logger;
    }

    [HttpGet(Name = "GetWeatherForecast")]
    public IEnumerable<WeatherForecast> Get()
    {
        return 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();
    }

    [HttpGet(Name = "GetTest")]
    public IEnumerable<WeatherForecast> GetBlah()
    {
        return 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();
    }

Answer 1

控制器中的[Route]属性可以帮助您访问/WeatherForecast。并基于 HTTP 请求方法调用控制器操作方法。由于您正在尝试访问 /Weatherforecast 端点 - 它将调用 GET 方法。当您放置 [HttpGet(Name = "GetTest")] 之类的属性时，您指定的是操作方法的名称 - 它与路由无关。如果你想暴露这个方法，你需要像这样添加它。 [HttpGet("GetTest",Name = "GetTest")] - 第一个参数是模板，第二个参数是名称 - 它用于打开 API。

Answer 2

下面是工作demo，可以参考it.In程序，我不改app.MapControllers();我只是删除 [ApiController]，并添加路由。

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

        private readonly ILogger<WeatherForecastController> _logger;

        public WeatherForecastController(ILogger<WeatherForecastController> logger)
        {
            _logger = logger;
        }

        [Route("~/api/Get")]
        [HttpGet(Name = "GetWeatherForecast")]

        public IEnumerable<WeatherForecast> Get()
        {
            return 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();
        }
        [Route("~/api/GetBlah")]
        [HttpGet(Name = "GetTest")]

        public IEnumerable<WeatherForecast> GetBlah()
        {
            return 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();
        }

    }

结果：

ASP.Net Core 6 WebApi 例子中的路由在哪里？

Where is the routing in the example of ASP.Net Core 6 WebApi?

asp.net-core

asp.net-core-webapi