.NET applications however rely on the ciphers provided by the OS, and the only way to get new ciphers into the OS is through a patch from Microsoft. Unsupported versions of Windows typically do not receive these patches, so over time you can expect an increasing number of websites to stop working with .NET applications.
A function for loading CSS asynchronously
Referencing CSS stylesheets with link[rel=stylesheet] or @import causes browsers to delay page rendering while a stylesheet loads. When loading stylesheets that are not critical to the initial rendering of a page, this blocking behavior is undesirable. The new <link rel="preload"> standard enables us to load stylesheets asynchronously, without blocking rendering, and loadCSS provides a JavaScript polyfill for that feature to allow it to work across browsers. Additionally, loadCSS offers a separate (and optional) JavaScript function for loading stylesheets dynamically.
npm install fg-loadcss --save
This was a very quick run down of some of the options available to you to prevent mass assignment. Which approach you take is up to you, though I would definitely suggest using one of the latter 2-model approaches. There are other options too, such as doing explicit binding via TryUpdateModelAsync<> but the options I've shown represent some of the most common approaches. Whatever you do, don't just blindly bind your view models if you have properties that should not be edited by a user, or you could be in for a nasty surprise.
And whatever you do, don't bind directly to your EntityFramework models. Pretty please.
public class DBLog
{
public int DBLogId { get; set; }
public string? LogLevel { get; set; }
public string? EventName { get; set; }
public string? Message { get; set; }
public string? StackTrace { get; set; }
public DateTime CreatedDate { get; set; }=DateTime.Now;
} public class DBLogger:ILogger
{
private bool _isDisposed;
private readonly ApplicationDbContext _dbContext;
public DBLogger(ApplicationDbContext dbContext)
{
_dbContext = dbContext ?? throw new ArgumentNullException(nameof(dbContext));
}
public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception? exception, Func<TState, Exception?, string> formatter)
{
var dblLogItem = new DBLog()
{
EventName = eventId.Name,
LogLevel = logLevel.ToString(),
Message = exception?.Message,
StackTrace=exception?.StackTrace
};
_dbContext.DBLogs.Add(dblLogItem);
_dbContext.SaveChanges();
}
public bool IsEnabled(LogLevel logLevel)
{
return true;
}
public IDisposable BeginScope<TState>(TState state)
{
return null;
}
} حال باید یک لاگ پروایدر سفارشی را ایجاد کنیم تا بتوان یک نمونه از دیتابیس لاگر سفارشی بالا (DBLogger) را ایجاد کرد.
public class DbLoggerProvider:ILoggerProvider
{
private bool _isDisposed;
private readonly ApplicationDbContext _dbContext;
public DbLoggerProvider(ApplicationDbContext dbContext)
{
_dbContext = dbContext ?? throw new ArgumentNullException(nameof(dbContext));
}
public ILogger CreateLogger(string categoryName)
{
return new DBLogger(_dbContext);
}
public void Dispose()
{
}
}
همانطور که ملاحظه می‌نمایید، این لاگ پروایدر، از اینترفیس ILoggerProvider ارث بری کرده‌است که دارای متد CreateLogger می‌باشد ئ این متد با شروع برنامه، یک نمونه از دیتابیس لاگر سفارشی ما را ایجاد می‌کند. در سازنده‌ی این کلاس، DatabaseContext را مقدار دهی نموده‌ایم تا آنرا به کلاس DBLogger ارسال نماییم.
در انتها کافیست در کلاس Startup.cs این لاگ پروایدر سفارشی (DbLoggerProvider ) را صدا بزنیم.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory)
{
.
.
.
#region CustomLogProvider
var serviceProvider = app.ApplicationServices.CreateScope().ServiceProvider;
var appDbContext = serviceProvider.GetRequiredService<ApplicationDbContext>();
loggerFactory.AddProvider(new DbLoggerProvider(appDbContext));
#endregion
.
.
. public class DbLoggerProvider:ILoggerProvider
{
private readonly CancellationTokenSource _cancellationTokenSource = new();
private readonly IList<DBLog> _currentBatch = new List<DBLog>();
private readonly TimeSpan _interval = TimeSpan.FromSeconds(2);
private readonly BlockingCollection<DBLog> _messageQueue = new(new ConcurrentQueue<DBLog>());
private readonly Task _outputTask;
private readonly ApplicationDbContext _dbContext;
private bool _isDisposed;
public DbLoggerProvider(ApplicationDbContext dbContext)
{
_dbContext = dbContext ?? throw new ArgumentNullException(nameof(dbContext));
_outputTask = Task.Run(ProcessLogQueue);
}
public ILogger CreateLogger(string categoryName)
{
return new DBLogger(this,categoryName);
}
private async Task ProcessLogQueue()
{
while (!_cancellationTokenSource.IsCancellationRequested)
{
while (_messageQueue.TryTake(out var message))
{
try
{
_currentBatch.Add(message);
}
catch
{
//cancellation token canceled or CompleteAdding called
}
}
await SaveLogItemsAsync(_currentBatch, _cancellationTokenSource.Token);
_currentBatch.Clear();
await Task.Delay(_interval, _cancellationTokenSource.Token);
}
}
internal void AddLogItem(DBLog appLogItem)
{
if (!_messageQueue.IsAddingCompleted)
{
_messageQueue.Add(appLogItem, _cancellationTokenSource.Token);
}
}
private async Task SaveLogItemsAsync(IList<DBLog> items, CancellationToken cancellationToken)
{
try
{
if (!items.Any())
{
return;
}
// We need a separate context for the logger to call its SaveChanges several times,
// without using the current request's context and changing its internal state.
foreach (var item in items)
{
var addedEntry = _dbContext.DbLogs.Add(item);
}
await _dbContext.SaveChangesAsync(cancellationToken);
}
catch
{
// don't throw exceptions from logger
}
}
[SuppressMessage("Microsoft.Usage", "CA1031:catch a more specific allowed exception type, or rethrow the exception",
Justification = "don't throw exceptions from logger")]
private void Stop()
{
_cancellationTokenSource.Cancel();
_messageQueue.CompleteAdding();
try
{
_outputTask.Wait(_interval);
}
catch
{
// don't throw exceptions from logger
}
}
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
if (!_isDisposed)
{
try
{
if (disposing)
{
Stop();
_messageQueue.Dispose();
_cancellationTokenSource.Dispose();
_dbContext.Dispose();
}
}
finally
{
_isDisposed = true;
}
}
}
}
public class DBLogger:ILogger
{
private readonly LogLevel _minLevel;
private readonly DbLoggerProvider _loggerProvider;
private readonly string _categoryName;
public DBLogger(
DbLoggerProvider loggerProvider,
string categoryName
)
{
_loggerProvider= loggerProvider ?? throw new ArgumentNullException(nameof(loggerProvider));
_categoryName= categoryName;
}
public IDisposable BeginScope<TState>(TState state)
{
return new NoopDisposable();
}
public bool IsEnabled(LogLevel logLevel)
{
return logLevel >= _minLevel;
}
public void Log<TState>(
LogLevel logLevel,
EventId eventId,
TState state,
Exception exception,
Func<TState, Exception, string> formatter)
{
if (!IsEnabled(logLevel))
{
return;
}
if (formatter == null)
{
throw new ArgumentNullException(nameof(formatter));
}
var message = formatter(state, exception);
if (exception != null)
{
message = $"{message}{Environment.NewLine}{exception}";
}
if (string.IsNullOrEmpty(message))
{
return;
}
var dblLogItem = new DBLog()
{
EventName = eventId.Name,
LogLevel = logLevel.ToString(),
Message = $"{_categoryName}{Environment.NewLine}{message}",
StackTrace=exception?.StackTrace
};
_loggerProvider.AddLogItem(dblLogItem);
}
private class NoopDisposable : IDisposable
{
public void Dispose()
{
Dispose(true);
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool disposing)
{
}
}
}
If Not a And b Then ... Else ... EndIf
if(!(a) && b)
{
...
}
else
{
} public interface ICommand
{
}
public class Command1 : ICommand
{
}
public class Command2 : ICommand
{
} ICommand command = new Command1();
if (!(command is Command2))
{
} if (command is not Command2)
{
} if ((command is ICommand) && !(command is Command2))
{
} if (command is ICommand and not Command2)
{
} if (command is Command1 or Command2)
{
} var number = new Random().Next(1, 10);
if (number > 2 && number < 8)
{
} if (number is > 2 and < 8)
{
} public static bool IsLetterOrSeparator(char c) => (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '.' || c == ',';
public static bool IsLetterOrSeparator(char c) => c is (>= 'a' and <= 'z') or (>= 'A' and <= 'Z') or '.' or ',';
var number = new Random().Next(1, 10);
if (number <= 0)
{
Console.WriteLine("Less than or equal to 0");
}
else if (number > 0 && number <= 10)
{
Console.WriteLine("More than 0 but less than or equal to 10");
}
else
{
Console.WriteLine("More than 10");
} // C#9.0
switch (number)
{
case <= 0:
Console.WriteLine("Less than or equal to 0");
break;
case > 0 and <= 10:
Console.WriteLine("More than 0 but less than or equal to 10");
break;
default:
Console.WriteLine("More than 10");
break;
} // C#7.0
switch (number)
{
case int value when value <= 0:
Console.WriteLine("Less than or equal to 0");
break;
case int value when value > 0 && value <= 10:
Console.WriteLine("More than 0 but less than or equal to 10");
break;
default:
Console.WriteLine("More than 10");
break;
} var message = number switch
{
<= 0 => "Less than or equal to 0",
> 0 and <= 10 => "More than 0 but less than or equal to 10",
_ => "More than 10"
}; private static int GetDiscount(Product p) => p switch
{
Food => 0, // Food _ => 0 before C# 9
Book b => 75, // Book b _ => 75 before C# 9
_ => 25
}; |
توسط استاندارد جدید Fetch API | توسط XMLHttpRequest استاندارد |
توسط jQuery |
fetch('/my/name').then(function(response) {
if (response.ok) {
return response.text();
}
else {
throw new Error();
}
}).then(
function success(name) {
console.log('my name is ' + name);
},
function failure() {
console.error('Name request failed!');
}
); | var xhr = new XMLHttpRequest();
xhr.open('GET', '/my/name');
xhr.onload = function() {
if (xhr.status >= 400) {
console.error('Name request failed!');
}
else {
console.log('my name is ' + xhr.responseText);
}
};
xhr.onerror = function() {
console.error('Name request failed!');
};
xhr.send(); | $.get('/my/name').then(
function success(name) {
console.log('my name is ' + name);
},
function failure() {
console.error('Name request failed!');
}
); |
| توسط استاندارد جدید Fetch API | توسط XMLHttpRequest استاندارد | توسط jQuery |
fetch('/user/name', {
method: 'POST',
body: 'some data'
}); | var xhr = new XMLHttpRequest();
xhr.open('POST', '/user/name');
xhr.send('some data'); | $.ajax({
method: 'POST',
url: '/user/name',
contentType: 'text/plain',
data: 'some data'
}); |
| توسط استاندارد جدید Fetch API | توسط XMLHttpRequest استاندارد | توسط jQuery |
fetch('/user/1', {
method: 'PUT',
body: //record including new mobile number
}); | var xhr = new XMLHttpRequest();
xhr.open('PUT', '/user/1');
xhr.send(/* record including new data */); | $.ajax({
method: 'PUT',
url: '/user/1',
contentType: 'text/plain',
data: //record including new data
}); |
| توسط استاندارد جدید Fetch API | توسط XMLHttpRequest استاندارد | توسط jQuery |
fetch('/user/1', {method: 'DELETE'}); | var xhr = new XMLHttpRequest();
xhr.open('DELETE', '/user/1');
xhr.send(); | $.ajax('/user/1', {method: 'DELETE'}); |
$.param({
key1: 'some value',
'key 2': 'another value'
}); key1=some+value&key+2=another+value
$.ajax({
method: 'POST',
url: '/user',
data: {
name: 'VahidN',
address: 'Address 1',
phone: '555-555-5555'
}
}); var xhr = new XMLHttpRequest();
var data = encodeURI('name=VahidN&address=Address 1&phone=555-555-5555');
xhr.open('POST', '/user');
xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
xhr.send(data); var data = encodeURI('name=VahidN&address=Address 1&phone=555-555-5555');
fetch('/user', {
method: 'POST',
headers: {'Content-Type': 'application/x-www-form-urlencoded'},
body: data
}); function param(object) {
var encodedString = '';
for (var prop in object) {
if (object.hasOwnProperty(prop)) {
if (encodedString.length > 0) {
encodedString += '&';
}
encodedString += encodeURI(prop + '=' + object[prop]);
}
}
return encodedString;
} $.ajax({
method: 'POST',
url: '/user',
contentType: 'application/json',
data: JSON.stringify({
name: 'VahidN',
address: 'Address 1',
phone: {
home: '555-555-5555',
mobile: '444-444-4444'
}
});
}); var xhr = new XMLHttpRequest();
var data = JSON.stringify({
name: 'VahidN',
address: 'Address 1',
phone: {
home: '555-555-5555',
mobile: '444-444-4444'
}
});
xhr.open('POST', '/user');
xhr.setRequestHeader('Content-Type', 'application/json');
xhr.send(data); var xhr = new XMLHttpRequest();
xhr.open('GET', '/user/1');
xhr.onload = function() {
var user = JSON.parse(xhr.responseText);
// do something with this user JavaScript object
};
xhr.send(); fetch('/user', {
method: 'POST',
headers: {'Content-Type': 'application/json'},
body: JSON.stringify({
name: 'VahidN',
address: 'Address 1',
phone: {
home: '555-555-5555',
mobile: '444-444-4444'
}
});
}); fetch('/user/1').then(function(response) {
return response.json();
}).then(function(userRecord) {
// do something with this user JavaScript object
}); fetch('/user/1')
.then(response => response.json()) // Transform the data into json
.then(userRecord => {
// do something with this userRecord object
}); <form action="my/server" method="POST" enctype="multipart/form-data"> <label>First Name: <input name="first"> </label> <label>Last Name: <input name="last"> </label> <button>Submit</button> </form>
-----------------------------1686536745986416462127721994 Content-Disposition: form-data; name="first" Vahid -----------------------------1686536745986416462127721994 Content-Disposition: form-data; name="last" N -----------------------------1686536745986416462127721994--
var formData = new FormData();
formData.append('name', 'VahidN');
formData.append('address', 'Address 1');
formData.append('phone', '555-555-5555');
$.ajax({
method: 'POST',
url: '/user',
contentType: false,
processData: false,
data: formData
}); multipart/form-data; boundary=—————————1686536745986416462127721994
| توسط استاندارد جدید Fetch API | توسط XMLHttpRequest استاندارد |
var formData = new FormData();
formData.append('name', 'VahidN');
formData.append('address', 'Address 1');
formData.append('phone', '555-555-5555');
fetch('/user', {
method: 'POST',
body: formData
}); | var formData = new FormData(),
xhr = new XMLHttpRequest();
formData.append('name', 'VahidN');
formData.append('address', 'Address 1');
formData.append('phone', '555-555-5555');
xhr.open('POST', '/user');
xhr.send(formData); |
| توسط استاندارد جدید Fetch API | توسط XMLHttpRequest استاندارد | توسط jQuery |
var file = document.querySelector(
'INPUT[type="file"]').files[0];
fetch('/uploads', {
method: 'POST',
body: file
});
} | var file = document.querySelector(
'INPUT[type="file"]').files[0],
xhr = new XMLHttpRequest();
xhr.open('POST', '/uploads');
xhr.send(file); | var file = $('INPUT[type="file"]')[0].files[0];
$.ajax({
method: 'POST',
url: '/uploads',
contentType: false,
processData: false,
data: file
}); |
fetch(url)
.then((resp) => resp.json()) // Transform the data into json
.then(function(data) {
// use data object
})
}) function downloadBlob()
{
fetch('/Home/InMemoryReport')
.then(function(response) {
return response.blob();
})
.then(function(xlsxBlob) {
var a = document.createElement("a");
document.body.appendChild(a);
a.style = "display: none";
let url = window.URL.createObjectURL(xlsxBlob);
a.href = url;
a.download = "report.xlsx";
a.click();
window.URL.revokeObjectURL(url);
});
} $.ajax('http://jsonp-aware-endpoint.com/user/1', {
jsonp: 'callback',
dataType: 'jsonp'
}).then(function(response) {
// handle user info from server
}); window.myJsonpCallback = function(data) {
// handle user info from server
};
var scriptEl = document.createElement('script');
scriptEl.setAttribute('src',
'http://jsonp-aware-endpoint.com/user/1?callback=myJsonpCallback');
document.body.appendChild(scriptEl); | توسط استاندارد جدید Fetch API | توسط XMLHttpRequest استاندارد | توسط jQuery |
fetch('http://someotherdomain.com', {
method: 'POST',
headers: {
'Content-Type': 'text/plain'
},
credentials: 'include'
}); | var xhr = new XMLHttpRequest();
xhr.open('POST', 'http://someotherdomain.com');
xhr.withCredentials = true;
xhr.setRequestHeader('Content-Type', 'text/plain');
xhr.send('sometext'); | $.ajax('http://someotherdomain.com', {
method: 'POST',
contentType: 'text/plain',
data: 'sometext',
beforeSend: function(xmlHttpRequest) {
xmlHttpRequest.withCredentials = true;
}
}); |
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net7.0</TargetFramework>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="BenchmarkDotNet" Version="0.13.4" />
</ItemGroup>
</Project> using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Jobs;
namespace NET7Loops;
[SimpleJob(RuntimeMoniker.Net60)]
[SimpleJob(RuntimeMoniker.Net70)]
[MemoryDiagnoser(false)]
public class Benchmarks
{
private int[] ItemsArray;
private List<int> ItemsList;
[GlobalSetup]
public void Setup()
{
var random = new Random(420);
var randomItems = Enumerable.Range(0, 1000).Select(_ => random.Next());
ItemsArray = randomItems.ToArray();
ItemsList = randomItems.ToList();
}
[Benchmark]
public void For_Array()
{
for (var i = 0; i < ItemsArray.Length; i++)
{
var item = ItemsArray[i];
}
}
[Benchmark]
public void For_List()
{
for (var i = 0; i < ItemsList.Count; i++)
{
var item = ItemsList[i];
}
}
[Benchmark]
public void ForEach_Array()
{
foreach (var item in ItemsArray)
{
}
}
[Benchmark]
public void ForEach_List()
{
foreach (var item in ItemsList)
{
}
}
} using BenchmarkDotNet.Running; using NET7Loops; BenchmarkRunner.Run<Benchmarks>();
// Decompiled with JetBrains decompiler
// Type: NET7Loops.Benchmarks
// Assembly: NET7Loops, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null
// MVID: E398BEE7-8123-4C55-AF9A-F7D83DDA73F1
// Assembly location: C:\Prog\1401\Net7Tests\NET7Loops\bin\Debug\net7.0\NET7Loops.dll
// Compiler-generated code is shown
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Jobs;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.CompilerServices;
namespace NET7Loops
{
[NullableContext(1)]
[Nullable(0)]
[SimpleJob(RuntimeMoniker.Net60, -1, -1, -1, -1, null, false)]
[SimpleJob(RuntimeMoniker.Net70, -1, -1, -1, -1, null, false)]
[MemoryDiagnoser(false)]
public class Benchmarks
{
private int[] ItemsArray;
private List<int> ItemsList;
[GlobalSetup]
public void Setup()
{
Benchmarks.<>c__DisplayClass2_0 cDisplayClass20 = new Benchmarks.<>c__DisplayClass2_0();
cDisplayClass20.random = new Random(420);
IEnumerable<int> source = Enumerable.Range(0, 1000).Select<int, int>(new Func<int, int>((object) cDisplayClass20, __methodptr(<Setup>b__0)));
this.ItemsArray = source.ToArray<int>();
this.ItemsList = source.ToList<int>();
}
[Benchmark(23, "C:\\Prog\\1401\\Net7Tests\\NET7Loops\\Benchmarks.cs")]
public void For_Array()
{
for (int index = 0; index < this.ItemsArray.Length; ++index)
{
int items = this.ItemsArray[index];
}
}
[Benchmark(32, "C:\\Prog\\1401\\Net7Tests\\NET7Loops\\Benchmarks.cs")]
public void For_List()
{
for (int index = 0; index < this.ItemsList.Count; ++index)
{
int items = this.ItemsList[index];
}
}
[Benchmark(41, "C:\\Prog\\1401\\Net7Tests\\NET7Loops\\Benchmarks.cs")]
public void ForEach_Array()
{
int[] itemsArray = this.ItemsArray;
for (int index = 0; index < itemsArray.Length; ++index)
{
int num = itemsArray[index];
}
}
[Benchmark(49, "C:\\Prog\\1401\\Net7Tests\\NET7Loops\\Benchmarks.cs")]
public void ForEach_List()
{
List<int>.Enumerator enumerator = this.ItemsList.GetEnumerator();
try
{
while (enumerator.MoveNext())
{
int current = enumerator.Current;
}
}
finally
{
enumerator.Dispose();
}
}
public Benchmarks()
{
base..ctor();
}
[CompilerGenerated]
private sealed class <>c__DisplayClass2_0
{
[Nullable(0)]
public Random random;
public <>c__DisplayClass2_0()
{
base..ctor();
}
internal int <Setup>b__0(int _)
{
return this.random.Next();
}
}
}
} for (int index = 0; index < this.ItemsArray.Length; ++index)
{
int items = this.ItemsArray[index];
} List<int>.Enumerator enumerator = this.ItemsList.GetEnumerator();
try
{
while (enumerator.MoveNext())
{
int current = enumerator.Current;
}
}
finally
{
enumerator.Dispose();
} npm install -g grunt-cli && npm install && grunt build
