<div class="wizard">
            <a [routerLink]="['info']" routerLinkActive="active">
                Basic Information
            </a>
            <a [routerLink]="['tags']" routerLinkActive="active">
                Search Tags
            </a>
</div>

    <ul class="nav navbar-nav">
      <li routerLinkActive="active">
        <a [routerLink]="['/home']">Home</a>
      </li>
      <li routerLinkActive="active">
        <a [routerLink]="['/products']">Product List</a>
      </li>
      <li routerLinkActive="active">
        <a [routerLink]="['/products', 0, 'edit']">Add Product</a>
       </li>      
    </ul>

      <li routerLinkActive="active" [routerLinkActiveOptions]="{ exact: true }">
        <a [routerLink]="['/products']">Product List</a>
      </li>

        <div class="wizard">
            <a [routerLink]="['info']" routerLinkActive="active">
                Basic Information
                <span [ngClass]="{'glyphicon glyphicon-exclamation-sign': !isValid('info')}"></span>
            </a>
            <a [routerLink]="['tags']" routerLinkActive="active">
                Search Tags
                <span [ngClass]="{'glyphicon glyphicon-exclamation-sign': !isValid('tags')}"></span>
            </a>
        </div>

@NgModule({
  imports: [RouterModule.forRoot(routes/*, { useHash: true }*/, { enableTracing: true })],

this.router.events.subscribe((routerEvent: Event) => {
    if (routerEvent instanceof NavigationStart) {
      //...
    }
});

import { Router, Event, NavigationStart, NavigationEnd, NavigationError, NavigationCancel } from '@angular/router';

import { AuthService } from './user/auth.service';
import { Component } from '@angular/core';


@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  pageTitle: string = 'Routing Lab';

  loading: boolean = true;

  constructor(private authService: AuthService,
    private router: Router) {
    router.events.subscribe((routerEvent: Event) => {
      this.checkRouterEvent(routerEvent);
    });
  }

  checkRouterEvent(routerEvent: Event): void {
    if (routerEvent instanceof NavigationStart) {
      this.loading = true;
    }

    if (routerEvent instanceof NavigationEnd ||
      routerEvent instanceof NavigationCancel ||
      routerEvent instanceof NavigationError) {
      this.loading = false;
    }
  }

  logOut(): void {
    this.authService.logout();
    this.router.navigateByUrl('/welcome');
  }
}

<span class="glyphicon glyphicon-refresh glyphicon-spin spinner" *ngIf="loading"></span>

/* Spinner */
.spinner {
  font-size:300%;
  position:absolute;
  top: 50%;
  left: 50%;
  z-index:10
}

.glyphicon-spin {
    -webkit-animation: spin 1000ms infinite linear;
    animation: spin 1000ms infinite linear;
}
@-webkit-keyframes spin {
    0% {
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100% {
        -webkit-transform: rotate(359deg);
        transform: rotate(359deg);
    }
}
@keyframes spin {
    0% {
        -webkit-transform: rotate(0deg);
        transform: rotate(0deg);
    }
    100% {
        -webkit-transform: rotate(359deg);
        transform: rotate(359deg);
    }
}

 public class Parent
    {
        public string Name { get; set; }
        public int X { get; set; }
        public int Y { get; set; }
        public Parent()
        {
            X = Y = 0;
        }
        public virtual void Move()
        {
            X += 5;
            Y += 5;
        }
        public void Shoot() { }
        public virtual void Pass() { } 
    }
    public class Child1 : Parent
    {
        public override void Move()
        {
            X += 10;
            Y += 10;
        }
    }
    public class Child2 : Parent
    {
        public override void Move()
        {
            X += 20;
            Y += 20;
        }
    }
    public enum State
    {
        Start,
        Move,
        Shoot,
        Pass
    }
    public class Creator
    {
        public static Parent GetInstance(bool? condition)
        {
            if (condition == null)
            {
                return new Parent();
            }
            if (condition == true)
            {
                return new Child1();
            }
            else
            {
                return new Child2();
            }
        }
    }
    public class Context
    {
        public void SetState(ref State s)
        {
            s = State.Move;
        }
        public void Main()
        {
            State state =State.Start;
            
            // در مورد نوع این شیء چیزی نمیدانیم و وابسته به شرایط نوع آن متغیر است
            // در حقیقت شیء کلاس فرزند را جای شیء کلاس والد  قرار می‌دهیم و نه بالعکس

            Parent obj = Creator.GetInstance(null);
            
            // منطق برنامه وضعیت را تغییر می‌دهد
            SetState(ref state);

            // قواعد کلی و عمومی که بدون در نظر گرفتن کلاس (نوع) شیء بر آن اعمال می‌شود
            switch (state)
            {
                case State.Move:
                    obj.Move();
                    break;
                case State.Shoot:
                    obj.Shoot();
                    break;
                case State.Pass:
                    obj.Pass();
                    break;
                default:
                    break;
            }           
        }
    }

Child1 obj = Creator.GetInstance(null);

 public interface IHuman
    {
        void Move();
        void Eat();
        void LevelUp();
        void FireBullet();
    }
    public class Player : IHuman
    {
        public void Eat() { }
        public void FireBullet() { }
        public void LevelUp() { }
        public void Move() { }
    }
    public class Enemy : IHuman
    {
        public void Eat() { }
        public void FireBullet() { }
        public void LevelUp() { }
        public void Move() { }
    }
    public class Citizen : IHuman
    {
        public void Eat() { }
        public void FireBullet() { }
        public void LevelUp() { }
        public void Move() { }
    }

public interface IMovable { void Move(); }
    public interface IEatable { void Eat(); }
    public interface IPlayer { void LevelUp(); }
    public interface IShooter { void FireBullet(); }
    public class PlayerBetter : IPlayer, IMovable, IEatable, IShooter
    {
        public void Eat() { }
        public void FireBullet() { }
        public void LevelUp() { }
        public void Move() { }
    }
    public class EnemyBetter : IMovable, IShooter
    {
        public void FireBullet() { }
        public void Move() { }
    }
    public class CitizenBetter : IMovable
    {
        public void Move() { }
    }

public class Controller
    {
        public Service Service { get; set; }
        public Controller()
        {
            // کنترلر باید نحوه نمونه گیری را بداند (ورودی‌های لازم) و این از وظایف آن خارج است
            Service = new Service(1);
        }
        public void DoWork()
        {
            Service.RunService();
        }
    }

    public class Service
    {
        public int State { get; set; }
        public Service(int s)
        {
            State = s;
        }
        public void RunService() { }
    }

public class ControllerBetter
    {
        // ارجاع به واسط باعث انعطاف و کاهش وابستگی شده است
        public IService Service { get; set; }
        public ControllerBetter(IService service)
        {
            // یک کلاس دیگر وظیفه ارسال سرویس به سازنده کلاس کنترلر را دارد 
            // و مسئولیت نمونه گیری را از دوش کنترلر برداشته است
            Service = service;
        }
        public void DoWork()
        {
            Service.RunService();
        }
    }
    // کاهش وابستگی با تعریف واسط و تغییر وابستگی مستقیم بین کنترلر و سرویس
    public interface IService
    {
        void RunService();
    }
    // وابستگی جزییات به انتزاع
    public class ServiceBetter : IService
    {
        public int State { get; set; }
        public ServiceBetter(int s)
        {
            State = s;
        }
        public void RunService() { }
    }

 Install-Package MvcAjaxPager

public class Topic
{
   public int Id;
   public string Title;
   public string Text;
}

public class TopicService
{
    public static IEnumerable<Topic> Topics = new List<Topic>() {
       new Topic{Id=1,Title="Title 1",Text= "Text 1"},
       new Topic{Id=2,Title="Title 2",Text="Text 2"},
       new Topic{Id=3,Title="Title 3",Text="Text 3"},
       new Topic{Id=4,Title="Title 4",Text="Text 4"},
       new Topic{Id=5,Title="Title 5",Text="Text 5"},
       new Topic{Id=6,Title="Title 6",Text="Text 6"},
       new Topic{Id=7,Title="Title 7",Text="Text 7"},
       new Topic{Id=8,Title="Title 8",Text="Text 8"},
       new Topic{Id=9,Title="Title 9",Text="Text 9"},
       new Topic{Id=10,Title="Title 10",Text="Text 10"},
       new Topic{Id=11,Title="Title 11",Text="Text 11"},
       new Topic{Id=12,Title="Title 12",Text="Text 12"},
       new Topic{Id=13,Title="Title 13",Text="Text 13"},
       new Topic{Id=14,Title="Title 14",Text="Text 14"},
       new Topic{Id=15,Title="Title 15",Text="Text 15"},
       new Topic{Id=16,Title="Title 16",Text="Text 16"},
       new Topic{Id=17,Title="Title 17",Text="Text 17"},
       new Topic{Id=18,Title="Title 18",Text="Text 18"},
       new Topic{Id=19,Title="Title 19",Text="Text 19"},
       new Topic{Id=20,Title="Title 20",Text="Text 20"},
       new Topic{Id=21,Title="Title 21",Text="Text 21"},
       new Topic{Id=22,Title="Title 22",Text="Text 22"},
      };

    public static IEnumerable<Topic> GetAll()
    {
       return Topics.OrderBy(row => row.Id);
    }
}

public class ListViewModel
{
   public IEnumerable<Topic> Topics { get; set; }
   public int PageIndex { get; set; }
   public int TotalItemCount { get; set; }
}

public ActionResult Index(int page = 1)
{
       var topics = TopicService.GetAll ();
       int totalItemCount = topics.Count();
       var model = new ListViewModel()
       {
              PageIndex = page,
              Topics = topics.OrderBy(p => p.Id).Skip((page - 1) * 10).Take(10).ToList(),
              TotalItemCount = totalItemCount
       };

       if (!Request.IsAjaxRequest())
       {
              return View(model);
       }

       return PartialView("_TopicList", model);
}

@using MvcAjaxPager
@model ListViewModel

@Html.AjaxPager(Model.TotalItemCount, 10, Model.PageIndex, "Index", "Home", null, new PagerOptions
   {
       ShowDisabledPagerItems = true,
       AlwaysShowFirstLastPageNumber = true,
       HorizontalAlign = "center",
       ShowFirstLast = false,
       CssClass = "NavigationBox",
       AjaxUpdateTargetId = "dvTopics",
       AjaxOnBegin = "AjaxStart",
       AjaxOnComplete = "AjaxStop"
   }, null, null)

<table>
    <tr>
        <th>
            @Html.DisplayName("ID")
        </th>
        <th>
            @Html.DisplayName("Title")
        </th>
        <th>
            @Html.DisplayName("Text")
        </th>
    </tr>

    @foreach (var topic in Model.Topics)
    {
        <tr>
            <td>
                @topic.Id
        </td>
        <td>
            @topic.Title
        </td>
        <td>
            @topic.Text
        </td>
    </tr>
    }
</table>

@Html.AjaxPager(Model.TotalItemCount, 10, Model.PageIndex, "Index", "Home", null, new PagerOptions
   {
       ShowDisabledPagerItems = true,
       AlwaysShowFirstLastPageNumber = true,
       HorizontalAlign = "center",
       ShowFirstLast = true,
       FirstPageText = "اولین",
       LastPageText = "آخرین",
       MorePageText = "...",
       PrevPageText = "قبلی",
       NextPageText = "بعدی",
       CssClass = "NavigationBox",
       AjaxUpdateTargetId = "dvTopics",
       AjaxOnBegin = "AjaxStart",
       AjaxOnComplete = "AjaxStop"
   }, null, null)

@using MvcAjaxPager
@model ListViewModel
@{
    Layout = null;
}

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>Index</title>
</head>
<body>
    <div id="dvTopics">
        @{
            @Html.Partial("_TopicList", Model);
        }
    </div>

    <script type="text/javascript" src="@Url.Content("~/Scripts/jquery-1.7.2.min.js")"></script>
    <script type="text/javascript" src="@Url.Content("~/Scripts/path.min.js")"></script>
    <script type="text/javascript" src="@Url.Content("~/Scripts/jquery.pager-1.0.1.min.js")"></script>
    <script type="text/javascript">
        $('.NavigationBox').pager();

        //pagination before start
        function AjaxStart() {
            console.log('Start AJAX call. Loading message can be shown');
        }
        // pagination - after request
        function AjaxStop() {
            console.log('Stop AJAX call. Loading message can be hidden');
        };
    </script>
</body>
</html>

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>

    <link href="Content/font-awesome.css" rel="stylesheet" />
    <link href="Content/froala_editor.css" rel="stylesheet" />

    <script src="Scripts/jquery-1.10.2.min.js"></script>
    <script src="Scripts/froala_editor.min.js"></script>
    <script src="Scripts/langs/fa.js"></script>
</head>
<body>
    <form id="form1" runat="server">
    </form>
</body>
</html>

@{
    ViewBag.Title = "Index";
}

<style type="text/css">
    /*تنظیم فونت پیش فرض ادیتور*/
    .froala-element {
    }
</style>

@using (Html.BeginForm(actionName: "Index", controllerName: "Home"))
{
    @Html.TextArea(name: "Editor1")
    <input type="submit" value="ارسال" />
}

@section Scripts
{
    <script type="text/javascript">
        $(function () {
            $('#Editor1').editable({
                buttons: ["bold", "italic", "underline", "strikeThrough", "fontFamily",
                    "fontSize", "color", "formatBlock", "align", "insertOrderedList",
                    "insertUnorderedList", "outdent", "indent", "selectAll", "createLink",
                    "insertImage", "insertVideo", "undo", "redo", "html", "save", "inserthorizontalrule"],
                inlineMode: false,
                inverseSkin: true,
                preloaderSrc: '@Url.Content("~/Content/img/preloader.gif")',
                allowedImageTypes: ["jpeg", "jpg", "png"],
                height: 300,
                language: "fa",
                direction: "rtl",
                fontList: ["Tahoma, Geneva", "Arial, Helvetica", "Impact, Charcoal"],
                autosave: true,
                autosaveInterval: 2500,
                saveURL: '@Url.Action("FroalaAutoSave", "Home")',
                saveParams: { postId: "123" },
                spellcheck: true,
                plainPaste: true,
                imageButtons: ["removeImage", "replaceImage", "linkImage"],
                borderColor: '#00008b',
                imageUploadURL: '@Url.Action("FroalaUploadImage", "Home")',
                imageParams: { postId: "123" },
                enableScript: false
            });
        });
    </script>
}

        /// <summary>
        /// ذخیره سازی خودکار
        /// </summary>
        [HttpPost]
        [ValidateInput(false)]
        public ActionResult FroalaAutoSave(string body, int? postId) // نام پارامتر بادی را تغییر ندهید
        {
            //todo: save body ...
            return new EmptyResult();
        }

        // todo: مسایل امنیتی آپلود را فراموش نکنید
        /// <summary>
        /// ذخیره سازی تصاویر ارسالی
        /// </summary>
        [HttpPost]
        public ActionResult FroalaUploadImage(HttpPostedFileBase file, int? postId) // نام پارامتر فایل را تغییر ندهید
        {
            var fileName = Path.GetFileName(file.FileName);
            var rootPath = Server.MapPath("~/images/");
            file.SaveAs(Path.Combine(rootPath, fileName));
            return Json(new { link = "images/" + fileName }, JsonRequestBehavior.AllowGet);
        }

<%@ Page Title="" Language="C#" MasterPageFile="~/Site.Master"
    ValidateRequest="false"
    EnableEventValidation="false"
    AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="FroalaWebFormsTest.Default" %>

<%--اعتبارسنجی ورودی غیرفعال شده چون باید تگ ارسال شود--%>
<%--همچنین در وب کانفیگ هم تنظیم دیگری نیاز دارد--%>

<asp:Content ID="Content1" ContentPlaceHolderID="head" runat="server">
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolder1" runat="server">
    <%--حالت کلاینت آی دی بهتر است تنظیم شود در اینجا--%>
    <asp:TextBox ID="txtEditor" ClientIDMode="Static"
        runat="server" Height="199px" TextMode="MultiLine" Width="447px"></asp:TextBox>
    <br />
    <asp:Button ID="btnSave" runat="server" OnClick="btnSave_Click" Text="ارسال" />

    <style type="text/css">
        /*تنظیم فونت پیش فرض ادیتور*/
        .froala-element {
        }
    </style>

    <script type="text/javascript">
        $(function () {
            $('#txtEditor').editable({
                buttons: ["bold", "italic", "underline", "strikeThrough", "fontFamily",
                    "fontSize", "color", "formatBlock", "align", "insertOrderedList",
                    "insertUnorderedList", "outdent", "indent", "selectAll", "createLink",
                    "insertImage", "insertVideo", "undo", "redo", "html", "save", "inserthorizontalrule"],
                inlineMode: false,
                inverseSkin: true,
                preloaderSrc: 'Content/img/preloader.gif',
                allowedImageTypes: ["jpeg", "jpg", "png"],
                height: 300,
                language: "fa",
                direction: "rtl",
                fontList: ["Tahoma, Geneva", "Arial, Helvetica", "Impact, Charcoal"],
                autosave: true,
                autosaveInterval: 2500,
                saveURL: 'FroalaHandler.ashx',
                saveParams: { postId: "123" },
                spellcheck: true,
                plainPaste: true,
                imageButtons: ["removeImage", "replaceImage", "linkImage"],
                borderColor: '#00008b',
                imageUploadURL: 'FroalaHandler.ashx',
                imageParams: { postId: "123" },
                enableScript: false
            });
        });
    </script>
</asp:Content>

using System.IO;
using System.Web;
using System.Web.Script.Serialization;

namespace FroalaWebFormsTest
{
    public class FroalaHandler : IHttpHandler
    {
        //todo: برای اینکارها بهتر است از وب ای پی آی استفاده شود
        //todo: یا دو هندلر مجزا یکی برای تصاویر و دیگری برای ذخیره سازی متن

        public void ProcessRequest(HttpContext context)
        {
            var body = context.Request.Form["body"];
            var postId = context.Request.Form["postId"];
            if (!string.IsNullOrWhiteSpace(body) && !string.IsNullOrWhiteSpace(postId))
            {
                //todo: save changes

                context.Response.ContentType = "text/plain";
                context.Response.Write("");
                context.Response.End();
            }

            var files = context.Request.Files;
            if (files.Keys.Count > 0)
            {
                foreach (string fileKey in files)
                {
                    var file = context.Request.Files[fileKey];
                    if (file == null || file.ContentLength == 0)
                        continue;

                    //todo: در اینجا مسایل امنیتی آپلود فراموش نشود
                    var fileName = Path.GetFileName(file.FileName);
                    var rootPath = context.Server.MapPath("~/images/");
                    file.SaveAs(Path.Combine(rootPath, fileName));


                    var json = new JavaScriptSerializer().Serialize(new { link = "images/" + fileName });
                    // البته اینجا یک فایل بیشتر ارسال نمی‌شود
                    context.Response.ContentType = "text/plain";
                    context.Response.Write(json);
                    context.Response.End();
                }
            }

            context.Response.ContentType = "text/plain";
            context.Response.Write("");
            context.Response.End();
        }

        public bool IsReusable
        {
            get { return false; }
        }
    }
}

<location path="upload">
  <system.webServer>
    <handlers accessPolicy="Read" />
  </system.webServer>
</location>

 var date = new DateOnly(2020, 04, 20);

 var currentDate = DateOnly.FromDateTime(DateTime.Now);

if (DateOnly.TryParse("28/09/1984", new CultureInfo("en-US"), DateTimeStyles.None, out var result))
{
   Console.WriteLine(result);
}

DateOnly d1 = DateOnly.ParseExact("31 Dec 1980", "dd MMM yyyy", CultureInfo.InvariantCulture);  // Custom format
Console.WriteLine(d1.ToString("o", CultureInfo.InvariantCulture)); // "1980-12-31"  (ISO 8601 format)

var persianCalendar = new PersianCalendar();
DateOnly d2 = new DateOnly(1400, 9, 6, persianCalendar);
Console.WriteLine(d2.ToString("d MMMM yyyy", CultureInfo.InvariantCulture));

var newDate = date.AddDays(1).AddMonths(1).AddYears(1)

public TimeOnly(int hour, int minute)
public TimeOnly(int hour, int minute, int second)
public TimeOnly(int hour, int minute, int second, int millisecond)

var startTime = new TimeOnly(10, 30);

var endTime = new TimeOnly(13, 00, 00);

var diff = endTime - startTime;

Console.WriteLine($"Hours: {diff.TotalHours}");

TimeSpan ts = endTime.ToTimeSpan();

var currentTime = TimeOnly.FromDateTime(DateTime.Now);

DateTime dt = date.ToDateTime(new TimeOnly(0, 0));
Console.WriteLine(dt);

 var isBetween = currentTime.IsBetween(startTime, endTime);
Console.WriteLine($"Current time {(isBetween ? "is" : "is not")} between start and end");

var startTime = new TimeOnly(08, 00);
var endTime = new TimeOnly(09, 00);
 
Console.WriteLine($"{startTime < endTime}");

TimeOnly time = TimeOnly.ParseExact("5:00 pm", "h:mm tt", CultureInfo.InvariantCulture);  // Custom format
Console.WriteLine(time.ToString("T", CultureInfo.InvariantCulture)); // "17:00:00"  (long time format)

public record DataTypeTest(DateOnly Date, TimeOnly Time);

var date = DateOnly.FromDateTime(DateTime.Now);
var time = TimeOnly.FromDateTime(DateTime.Now);
var test = new DataTypeTest(date, time);
var json = JsonSerializer.Serialize(test);

Serialization and deserialization of 'System.DateOnly' instances are not supported.

    public class DateOnlyConverter : JsonConverter<DateOnly>
    {
        private readonly string _serializationFormat;

        public DateOnlyConverter() : this(null)
        { }

        public DateOnlyConverter(string? serializationFormat)
        {
            _serializationFormat = serializationFormat ?? "yyyy-MM-dd";
        }

        public override DateOnly Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            var value = reader.GetString();
            return DateOnly.ParseExact(value!, _serializationFormat, CultureInfo.InvariantCulture);
        }

        public override void Write(Utf8JsonWriter writer, DateOnly value, JsonSerializerOptions options)
            => writer.WriteStringValue(value.ToString(_serializationFormat));
    }

    public class TimeOnlyConverter : JsonConverter<TimeOnly>
    {
        private readonly string _serializationFormat;

        public TimeOnlyConverter() : this(null)
        {
        }

        public TimeOnlyConverter(string? serializationFormat)
        {
            _serializationFormat = serializationFormat ?? "HH:mm:ss.fff";
        }

        public override TimeOnly Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
        {
            var value = reader.GetString();
            return TimeOnly.ParseExact(value!, _serializationFormat, CultureInfo.InvariantCulture);
        }

        public override void Write(Utf8JsonWriter writer, TimeOnly value, JsonSerializerOptions options)
            => writer.WriteStringValue(value.ToString(_serializationFormat));
    }

var jsonOptions = new JsonSerializerOptions(JsonSerializerDefaults.Web);
jsonOptions.Converters.Add(new DateOnlyConverter());
jsonOptions.Converters.Add(new TimeOnlyConverter());
var json = JsonSerializer.Serialize(test, jsonOptions);