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Rick-AndersonRick-Anderson
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Add TryParse samples (dotnet#4)
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‎mvc/models/BindTryParseMVC/BindTryParseMVC.csproj

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<Project Sdk="Microsoft.NET.Sdk.Web">
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<PropertyGroup>
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<TargetFramework>net7.0</TargetFramework>
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<Nullable>enable</Nullable>
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<ImplicitUsings>enable</ImplicitUsings>
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</PropertyGroup>
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</Project>

‎mvc/models/BindTryParseMVC/Controllers/HomeController.cs

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using System.Diagnostics;
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using BindTryParseMVC.Models;
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using Microsoft.AspNetCore.Mvc;
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namespace BindTryParseMVC.Controllers
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{
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public class HomeController : Controller
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{
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private readonly ILogger<HomeController> _logger;
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public HomeController(ILogger<HomeController> logger)
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{
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_logger = logger;
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}
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public IActionResult Index()
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{
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return View();
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}
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public IActionResult Privacy()
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{
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return View();
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}
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[ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
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public IActionResult Error()
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{
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return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
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}
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}
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}

‎mvc/models/BindTryParseMVC/Controllers/WeatherForecastController.cs

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using System.Globalization;
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using BindTryParseMVC.Models;
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using Microsoft.AspNetCore.Mvc;
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namespace BindTryParseMVC.Controllers
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{
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public class WeatherForecastController : Controller
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{
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private static readonly string[] Summaries = new[]
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{
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"Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
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};
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// <snippet>
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//GET /WeatherForecast?culture=en-GB
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public IActionResult Index(Culture? culture)
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{
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var weatherForecasts = Enumerable
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.Range(1, 5).Select(index => new WeatherForecast
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{
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Date = DateTime.Now.AddDays(index),
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TemperatureC = Random.Shared.Next(-20, 55),
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Summary = Summaries[Random.Shared.Next(Summaries.Length)]
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})
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.Select(wf => new WeatherForecastViewModel
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{
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Date = wf.Date.ToString(new CultureInfo(culture?.DisplayName ?? "en-US")),
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TemperatureC = wf.TemperatureC,
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TemperatureF = wf.TemperatureF,
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Summary = wf.Summary
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});
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return View(weatherForecasts);
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}
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// </snippet>
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// GET /WeatherForecast/Range?range=07/12/2022-07/14/2022
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// <snippet_1>
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public IActionResult Range(DateRange? range)
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{
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var weatherForecasts = Enumerable
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.Range(1, 5).Select(index => new WeatherForecast
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{
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Date = DateTime.Now.AddDays(index),
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TemperatureC = Random.Shared.Next(-20, 55),
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Summary = Summaries[Random.Shared.Next(Summaries.Length)]
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})
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.Where(wf => DateOnly.FromDateTime(wf.Date) >= (range?.From ?? DateOnly.MinValue)
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&& DateOnly.FromDateTime(wf.Date) <= (range?.To ?? DateOnly.MaxValue))
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.Select(wf => new WeatherForecastViewModel
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{
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Date = wf.Date.ToString(CultureInfo.InvariantCulture),
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TemperatureC = wf.TemperatureC,
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TemperatureF = wf.TemperatureF,
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Summary = wf.Summary
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});
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return View("Index", weatherForecasts);
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}
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// </snippet_1>
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}
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}

‎mvc/models/BindTryParseMVC/Models/Culture.cs

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namespace BindTryParseMVC.Models
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{
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// <snippet>
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public class Culture
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{
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public string? DisplayName { get; }
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public Culture(string displayName)
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{
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if (string.IsNullOrEmpty(displayName))
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throw new ArgumentNullException(nameof(displayName));
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DisplayName = displayName;
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}
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public static bool TryParse(string? value, out Culture? result)
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{
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if (value is null)
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{
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result = default;
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return false;
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}
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result = new Culture(value);
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return true;
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}
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}
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// </snippet>
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}

‎mvc/models/BindTryParseMVC/Models/DateRange.cs

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namespace BindTryParseMVC.Models
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{
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// <snippet>
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public class DateRange
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{
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public DateOnly? From { get; }
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public DateOnly? To { get; }
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public DateRange(string from, string to)
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{
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if (string.IsNullOrEmpty(from))
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throw new ArgumentNullException(nameof(from));
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if (string.IsNullOrEmpty(to))
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throw new ArgumentNullException(nameof(to));
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From = DateOnly.Parse(from);
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To = DateOnly.Parse(to);
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}
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public static bool TryParse(string? value, IFormatProvider? provider, out DateRange? result)
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{
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if (string.IsNullOrEmpty(value) || value.Split('-').Length != 2)
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{
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result = default;
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return false;
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}
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var range = value.Split('-');
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result = new DateRange(range[0], range[1]);
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return true;
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}
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}
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// </snippet>
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}

‎mvc/models/BindTryParseMVC/Models/ErrorViewModel.cs

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namespace BindTryParseMVC.Models
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{
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public class ErrorViewModel
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{
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public string? RequestId { get; set; }
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public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
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}
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}

‎mvc/models/BindTryParseMVC/Models/WeatherForecast.cs

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

‎mvc/models/BindTryParseMVC/Models/WeatherForecastViewModel.cs

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namespace BindTryParseMVC.Models
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{
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public class WeatherForecastViewModel
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{
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public string? Date { get; set; }
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public int TemperatureC { get; set; }
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public int TemperatureF { get; set; }
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public string? Summary { get; set; }
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}
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}

‎mvc/models/BindTryParseMVC/Program.cs

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var builder = WebApplication.CreateBuilder(args);
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// Add services to the container.
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builder.Services.AddControllersWithViews();
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var app = builder.Build();
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// Configure the HTTP request pipeline.
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if (!app.Environment.IsDevelopment())
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{
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app.UseExceptionHandler("/Home/Error");
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}
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app.UseStaticFiles();
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app.UseRouting();
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app.UseAuthorization();
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app.MapControllerRoute(
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name: "default",
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pattern: "{controller=Home}/{action=Index}/{id?}");
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app.Run();

‎mvc/models/BindTryParseMVC/Views/Home/Index.cshtml

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@{
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ViewData["Title"] = "Home Page";
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}
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<div class="text-center">
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<h1 class="display-4">Welcome</h1>
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<p>Learn about <a href="https://docs.microsoft.com/aspnet/core">building Web apps with ASP.NET Core</a>.</p>
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</div>

‎mvc/models/BindTryParseMVC/Views/Home/Privacy.cshtml

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@{
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ViewData["Title"] = "Privacy Policy";
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}
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<h1>@ViewData["Title"]</h1>
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<p>Use this page to detail your site's privacy policy.</p>

‎mvc/models/BindTryParseMVC/Views/Shared/Error.cshtml

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@model ErrorViewModel
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@{
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ViewData["Title"] = "Error";
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}
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<h1 class="text-danger">Error.</h1>
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<h2 class="text-danger">An error occurred while processing your request.</h2>
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@if (Model.ShowRequestId)
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{
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<p>
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<strong>Request ID:</strong> <code>@Model.RequestId</code>
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</p>
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}
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<h3>Development Mode</h3>
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<p>
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Swapping to <strong>Development</strong> environment will display more detailed information about the error that occurred.
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</p>
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<p>
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<strong>The Development environment shouldn't be enabled for deployed applications.</strong>
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It can result in displaying sensitive information from exceptions to end users.
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For local debugging, enable the <strong>Development</strong> environment by setting the <strong>ASPNETCORE_ENVIRONMENT</strong> environment variable to <strong>Development</strong>
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and restarting the app.
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</p>

‎mvc/models/BindTryParseMVC/Views/Shared/_Layout.cshtml

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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8" />
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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<title>@ViewData["Title"] - BindTryParseMVC</title>
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<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.css" />
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<link rel="stylesheet" href="~/site.css" asp-append-version="true" />
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<link rel="stylesheet" href="~/BindTryParseMVC.styles.css" asp-append-version="true" />
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</head>
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<body>
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<header>
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<nav class="navbar navbar-expand-sm navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3">
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<div class="container-fluid">
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<a class="navbar-brand" asp-area="" asp-controller="Home" asp-action="Index">BindTryParseMVC</a>
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<button class="navbar-toggler" type="button" data-bs-toggle="collapse" data-bs-target=".navbar-collapse" aria-controls="navbarSupportedContent"
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aria-expanded="false" aria-label="Toggle navigation">
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<span class="navbar-toggler-icon"></span>
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</button>
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<div class="navbar-collapse collapse d-sm-inline-flex justify-content-between">
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<ul class="navbar-nav flex-grow-1">
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<li class="nav-item">
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<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Index">Home</a>
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</li>
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<li class="nav-item">
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<a class="nav-link text-dark" asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
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</li>
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<li class="nav-item">
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<a class="nav-link text-dark" asp-area="" asp-controller="WeatherForecast" asp-action="Index">Weather Forecast</a>
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</li>
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</ul>
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</div>
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</div>
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</nav>
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</header>
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<div class="container">
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<main role="main" class="pb-3">
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@RenderBody()
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</main>
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</div>
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<footer class="border-top footer text-muted">
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<div class="container">
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&copy; 2022 - BindTryParseMVC - <a asp-area="" asp-controller="Home" asp-action="Privacy">Privacy</a>
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</div>
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</footer>
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<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.js"></script>
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</body>
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</html>

‎mvc/models/BindTryParseMVC/Views/Shared/_Layout.cshtml.css

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/* Please see documentation at https://docs.microsoft.com/aspnet/core/client-side/bundling-and-minification
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for details on configuring this project to bundle and minify static web assets. */
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a.navbar-brand {
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white-space: normal;
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text-align: center;
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word-break: break-all;
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}
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a {
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color: #0077cc;
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}
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.btn-primary {
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color: #fff;
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background-color: #1b6ec2;
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border-color: #1861ac;
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}
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.nav-pills .nav-link.active, .nav-pills .show > .nav-link {
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color: #fff;
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background-color: #1b6ec2;
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border-color: #1861ac;
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}
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.border-top {
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border-top: 1px solid #e5e5e5;
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}
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.border-bottom {
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border-bottom: 1px solid #e5e5e5;
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}
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.box-shadow {
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box-shadow: 0 .25rem .75rem rgba(0, 0, 0, .05);
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}
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button.accept-policy {
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font-size: 1rem;
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line-height: inherit;
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}
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.footer {
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position: absolute;
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bottom: 0;
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width: 100%;
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white-space: nowrap;
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line-height: 60px;
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}

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