Initial commit

vscode/PracticalApps/Northwind.BlazorWasm/Server/Controllers/CustomersController.cs

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+using Microsoft.AspNetCore.Mvc; // [ApiController], [Route]
+using Microsoft.EntityFrameworkCore; // ToListAsync, FirstOrDefaultAsync
+using Packt.Shared; // NorthwindContext, Customer
+
+namespace Northwind.BlazorWasm.Server.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+public class CustomersController : ControllerBase
+{
+  private readonly NorthwindContext db;
+
+  public CustomersController(NorthwindContext db)
+  {
+    this.db = db;
+  }
+
+  [HttpGet]
+  public async Task<List<Customer>> GetCustomersAsync()
+  {
+    return await db.Customers.ToListAsync();
+  }
+
+  [HttpGet("in/{country}")] // different path to disambiguate
+  public async Task<List<Customer>> GetCustomersAsync(string country)
+  {
+    return await db.Customers
+      .Where(c => c.Country == country).ToListAsync();
+  }
+
+  [HttpGet("{id}")]
+  public async Task<Customer?> GetCustomerAsync(string id)
+  {
+    return await db.Customers
+      .FirstOrDefaultAsync(c => c.CustomerId == id);
+  }
+
+  [HttpPost]
+  public async Task<Customer?> CreateCustomerAsync
+    (Customer customerToAdd)
+  {
+    Customer? existing = await db.Customers.FirstOrDefaultAsync
+      (c => c.CustomerId == customerToAdd.CustomerId);
+
+    if (existing == null)
+    {
+      db.Customers.Add(customerToAdd);
+
+      int affected = await db.SaveChangesAsync();
+
+      if (affected == 1)
+      {
+        return customerToAdd;
+      }
+    }
+    return existing;
+  }
+
+  [HttpPut]
+  public async Task<Customer?> UpdateCustomerAsync(Customer c)
+  {
+    db.Entry(c).State = EntityState.Modified;
+
+    int affected = await db.SaveChangesAsync();
+
+    if (affected == 1)
+    {
+      return c;
+    }
+    return null;
+  }
+
+  [HttpDelete("{id}")]
+  public async Task<int> DeleteCustomerAsync(string id)
+  {
+    Customer? c = await db.Customers.FirstOrDefaultAsync
+      (c => c.CustomerId == id);
+
+    if (c != null)
+    {
+      db.Customers.Remove(c);
+      int affected = await db.SaveChangesAsync();
+      return affected;
+    }
+    return 0;
+  }
+}

vscode/PracticalApps/Northwind.BlazorWasm/Server/Controllers/WeatherForecastController.cs

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+using Microsoft.AspNetCore.Mvc;
+using Northwind.BlazorWasm.Shared;
+
+namespace Northwind.BlazorWasm.Server.Controllers
+{
+  [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]
+    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();
+    }
+  }
+}