ASP.NET Core routing parsing

Public sector

public class WeatherReport
    {
        private static readonly string[] Conditions = {"Fine"."Cloudy"."Rain"};
        private static readonly Random Random = new Random();
        public string City { get; }
        public IDictionary<DateTime, WeatherInfo> WeatherInfos { get; }

        public class WeatherInfo
        {
            /// <summary>
            ///The weather conditions
            /// </summary>
            public string Condition { get; set; }

            /// <summary>
            ///The highest temperature
            /// </summary>
            public double HighTemperature { get; set; }

            /// <summary>
            ///The lowest temperature
            /// </summary>
            public double LowTemperature { get; set; }}public WeatherReport(string city, int days)
        {
            City = city;
            WeatherInfos = new Dictionary<DateTime, WeatherInfo>();
            for (var i = 0; i < days; i++)
                WeatherInfos[DateTime.Today.AddDays(i + 1)] = new WeatherInfo
                {
                    Condition = Conditions[Random.Next(0.2)],
                    HighTemperature = Random.Next(20.30),
                    LowTemperature = Random.Next(10.20)}; }}Copy the code

Route parsing and view page return

public static class Sample01
{
    private static readonly Dictionary<string.string> Cities = new Dictionary<string.string> {["010"] = "Beijing"["027"] = "Wuhan"
    };

    public static void Run()
    {
        / / const string template = @ "weather / {city: regex (^ {0 \ d {{2, 3}} $)} / {days: int: range (1, 4)}";
        const string template = @"weather/{city}/{days}"; 
        //const string template = @"weather/{city? }/{days? } ";
        //const string template = @"weather/{city=010}/{days=4}"; 
        Host.CreateDefaultBuilder()
            .ConfigureWebHostDefaults(builder => builder
                .ConfigureServices(csv => csv.AddRouting())
                .Configure(app => app
                    .UseRouting()
                    .UseEndpoints(endpoints => endpoints.MapGet(template, WeatherForecast))))
            .Build()
            .Run();
    }

    public static async Task WeatherForecast(HttpContext context)
    {
        var city = (string) context.GetRouteData().Values["city"];
        city = Cities[city];
        var days = int.Parse(context.GetRouteData().Values["days"].ToString() ?? string.Empty);
        var report = new WeatherReport(city, days);
        await RendWeatherAsync(context, report);
    }
        //public static async Task WeatherForecast(HttpContext context)
        / / {
        // var routeValues = context.GetRouteData().Values;
        // // Default value: 010
        // var city = routeValues.TryGetValue("city", out var v1) ? (string) v1 : "010";
        // city = Cities[city];
        // // Default value 4
        // var days = routeValues.TryGetValue("city", out var v2) ? int.Parse(v2.ToString() ?? string.Empty) : 4;

        // var report = new WeatherReport(city, days);
        // await RendWeatherAsync(context, report);
        / /}

		//public static async Task WeatherForecast(HttpContext context)
        / / {
        // var city = (string) context.GetRouteData().Values["city"];
        // city = Cities[city];
        // var days = int.Parse(context.GetRouteData().Values["days"].ToString() ?? string.Empty);
        // var report = new WeatherReport(city, days);
        // await RendWeatherAsync(context, report);
        / /}

    private static async Task RendWeatherAsync(HttpContext context, WeatherReport report)
    {
        context.Response.ContentType = "text/html; charset=utf-8";
        await context.Response.WriteAsync("< HTML > < head > < title > weather < / title > < / head > < body >");
        await context.Response.WriteAsync($"<h3>{report.City}</h3>");
        foreach (var (key, value) in report.WeatherInfos)
        {
            await context.Response.WriteAsync($"{key:yyyy-MM-dd}:");
            await context.Response.WriteAsync(
                $"{value.Condition}({value.LowTemperature}℃ ~ {value.HighTemperature}℃) < br / > < br / >");
        }

        await context.Response.WriteAsync("</body></html>"); }}Copy the code