.NET Разработчик. Страница 9

public record Employee
{
  public string Name { get; init; }
  public decimal Salary { get; init; }
  public DateTime Hired { get; init; }
}

var newGuy = new Employee
{
  Name = "Dave Bowman",
  Salary = 100000m,
  Hired = DateTime.Now()
};

public record Employee
{
  public required string Name { get; init; }
  public decimal Salary { get; init; }
  public DateTime Hired { get; init; }
}

public UpdateAddress(int id, Address address)
{
  if (address == null)
  {
    throw new ArgumentNullException("address");
  }
  ...
}

public UpdateAddress(int id, Address address)
{
  ArgumentNullException.ThrowIfNull(address);
  ...
}

int[] numbers = {24, 320, 700};
string test = numbers switch
{
  [24, 320, 700] => "Это нужный массив!",
  _ => "Не подходит" 
};

int[] numbers = {24, 320, 700};
string test = numbers switch
{
  [24, 32, 700] => "Это нужный массив!",
  [24, _, 700] => "2й элемент может быть любым",
  [24, .., 700] => "1й элемент 24, последний 700",
  [< 25, ..] => "1й элемент меньше 25",
  _ => "Не подходит"
};

var text =
  $"Всего {people.Count} человек";

var text =
  $"Всего {students.Count 
    + teachers.Count} человек";

var utf8 = "HEAD/HTTP/1.1"u8;

string utf16 = "HEAD / HTTP/1.1";
byte[] utf8 = Encoding.UTF8.GetBytes(utf16);

var utf8data = "Special chars:\uD801\uD802"u8;

byte[] utf8data = "HEAD / HTTP/1.1";

string path = "c:\\myfilepath\\with-backslashes";

string path = @"c:\myfilepath\with-backslashes";

string xml = """
  <part number="1976">
    <name>Windscreen Wiper</name>
    <description>The Windscreen wiper automatically removes
       rain from your windscreen. It has a rubber
       <ref part="1977">blade</ref>, which can be ordered
       separately.
    </description>
  </part>
  """;

string xml = """" 
    Теперь можно использовать """ в строке.
    """";

int number = 1;
string json =
  $$"""
  {
    "number": "{{number}}"
  }
  """;

<PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
  <PlatformTarget>AnyCPU</PlatformTarget>
  …
  <LangVersion>11.0</LangVersion>
</PropertyGroup>

namespace System.Runtime.CompilerServices
{
  public static class IsExternalInit { }
}

// настройка БД
var dbConfig = new MsSqlTestcontainerConfiguration
{
  Password = "Test1234",
  Database = "TestDB"
};

// создание контейнера
var сontainer = 
 new TestcontainersBuilder<MsSqlTestcontainer>()
  .WithDatabase(dbConfig)
  .WithImage("mcr.microsoft.com/mssql/server:2022-latest")
  .Build();

// и запуск
container.StartAsync().Wait();

record Dog (string Name, DateTime BirthDate);

using (var db = new SqlConnection(
  container.ConnectionString))
{ 
  db.Execute(@"CREATE TABLE Dogs(
    BirthDate DATETIME NOT NULL,
    Name VARCHAR(MAX) NOT NULL
  )");

  var born = new DateTime(2022, 12, 22);
  db.Execute(@"
   INSERT Dogs(BirthDate,Name)
   VALUES(@BirthDate, @Name)",
   new {
    BirthDate = born,
    Name = "Joe"
   });

  var dog = db.Query<Dog>(
    @"SELECT * FROM Dogs")
   .First();
  Assert.AreEqual(born, dog.BirthDate);
}

// очищаем контейнер
container.DisposeAsync();

{
  "balance": "$2,285.51",
  "name": "Eva Sharpe",
  "email": "[email protected]",
  "latitude": 46.325291,
  "friends": [
    {
      "id": 0,
      "name": "Nielsen Casey",
      "age": 19
    },
    {
      "id": 1,
      "name": "Carlene Long",
      "age": 38
    }
  ]
}

var expressions = new (string, string)[]
{
 ("scalar", "balance"),
 ("projection", "{email: email, name: name}"),
 ("functions", "to_string(latitude)"),
 ("arrays", "friends[*].name"),
 ("filtering", "friends[?age > `20`].name"),
 ("aggregation", "{sum: sum(friends[*].age)}"),
};

var parser = new JmesPath();
foreach (var (name, expression) in expressions)
{
  var result = parser.Transform(source, expression);
  Console.WriteLine($"{name}: {result}");
}

scalar: "$2,285.51"
projection: {"email":"[email protected]","name":"Eva Sharpe"}
functions: "46.325291"
arrays: ["Nielsen Casey","Carlene Long"]
filtering: ["Carlene Long"]
aggregation: {"sum":57}

namespace ThirdPartyLibrary;

public static class Calculator
{
   public static int Add(int a = 0, int b = 0)
   {
     Console.WriteLine($"{a}+{b}");
     return a + b;
   }
 }
}

using ThirdPartyLibrary;

int add = Calculator.Add();
add = Calculator.Add(2);
add = Calculator.Add(2, 3);

Console.ReadLine();

//Вывод:
0+0
2+0
2+3

0+0
2+0
2+3

10+10
2+10
2+3

var arg = 0;
function legacyFunction(arg) {
  var nxt = arg + 1;
  console.log(arg + ' > ' + nxt);
  return nxt;
}

<script src="legacysample.js"></script>

@inject IJSRuntime JSRuntime

var currentCount = 0;
...
async void IncrementCount()
{
  currentCount = await 
   JSRuntime.InvokeAsync<int>(
    "legacyFunction", currentCount);
}

"WebHook": {
  "WebhookUrl": "https://example.com/event",
  "DisplayName": "DevOps",
  "Enabled": true
}

using System.ComponentModel.DataAnnotations;

public class WebHookSettings
{
  [Required, Url]
  public string WebhookUrl { get; set; }
  [Required]
  public string DisplayName { get; set; }
  public bool Enabled { get; set; }
}

using System.ComponentModel.DataAnnotations;
using Microsoft.Extensions.Options;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddOptions<WebHookSettings>()
  .BindConfiguration("WebHook")
  .ValidateDataAnnotations()
  .ValidateOnStart();

builder.Services.AddOptions<WebHookSettings>()
  .BindConfiguration("WebHook")
  .ValidateDataAnnotations()
  .Validate(s =>
    {
      return s.WebhookUrl.StartsWith("https://");
    }, "WebHookUrl must start with https://")
  .ValidateOnStart();

"WebHook": {
  "WebhookUrl": "http://example.com/event",
  "DisplayName": "DevOps",
  "Enabled": true
}

Unhandled exception. Microsoft.Extensions.Options.OptionsValidationException: WebHookUrl must start with https://