public class Category
{
    public int CategoryId { set; get; }
    public string CategoryName { set; get; }

    [JsonIgnore]
    public IList<Product> Products { set; get; }
}


public class Product
{
    public int ProductId { set; get; }
    public string ProductName { set; get; }
}

namespace AngularTemplateDrivenFormsLab.Controllers
{
    [Route("api/[controller]")]
    public class ProductController : Controller
    {
        [HttpGet("[action]")]
        public async Task<IActionResult> GetCategories()
        {
            await Task.Delay(500);

            return Json(CategoriesDataSource.Items);
        }

        [HttpGet("[action]/{categoryId:int}")]
        public async Task<IActionResult> GetProducts(int categoryId)
        {
            await Task.Delay(500);

            var products = CategoriesDataSource.Items
                            .Where(category => category.CategoryId == categoryId)
                            .SelectMany(category => category.Products)
                            .ToList();
            return Json(products);
        }
    }
}

 >ng g m Product -m app.module --routing

 >ng g c product/product-group

>ng g cl product/product
>ng g cl product/Category
>ng g cl product/product-group-form

export class ProductGroupForm {
  constructor(
    public categoryId?: number,
    public productId?: number
  ) { }
}

export class Product {
  constructor(
    public productId: number,
    public productName: string
  ) { }
}

export class Category {
  constructor(
    public categoryId: number,
    public categoryName: string
  ) { }
}

 >ng g s product/product-items -m product.module

import { Injectable } from "@angular/core";
import { Http, Response, Headers, RequestOptions } from "@angular/http";

import { Observable } from "rxjs/Observable";
import "rxjs/add/operator/do";
import "rxjs/add/operator/catch";
import "rxjs/add/observable/throw";
import "rxjs/add/operator/map";
import "rxjs/add/observable/of";

import { Category } from "./category";
import { Product } from "./product";

@Injectable()
export class ProductItemsService {

  private baseUrl = "api/product";

  constructor(private http: Http) { }

  private handleError(error: Response): Observable<any> {
    console.error("observable error: ", error);
    return Observable.throw(error.statusText);
  }

  getCategories(): Observable<Category[]> {
    return this.http
      .get(`${this.baseUrl}/GetCategories`)
      .map(response => response.json() || {})
      .catch(this.handleError);
  }

  getProducts(categoryId: number): Observable<Product[]> {
    return this.http
      .get(`${this.baseUrl}/GetProducts/${categoryId}`)
      .map(response => response.json() || {})
      .catch(this.handleError);
  }
}

export class ProductGroupComponent implements OnInit {

  categories: Category[] = [];
 model = new ProductGroupForm();

  constructor(private productItemsService: ProductItemsService) { }

  ngOnInit() {
    this.productItemsService.getCategories().subscribe(
      data => {
        this.categories = data;
      },
      err => console.log("get error: ", err)
    );
  }

<div class="container">
  <h3>Cascading Drop-down Lists</h3>
  <form #form="ngForm" (submit)="submitForm(form)" novalidate>
    <div class="form-group">
      <label class="control-label">Category</label>
      <span class="glyphicon glyphicon-refresh glyphicon-spin spinner" *ngIf="categories.length == 0"></span>
      <select class="form-control" name="categoryCtrl" #categoryCtrl (change)="fetchProducts(categoryCtrl.value)"
        [(ngModel)]="model.categoryId">
        <option value="undefined">Select a Category...</option>
        <option *ngFor="let category of categories" value="{{category.categoryId}}">
          {{ category.categoryName }}
        </option>
      </select>
    </div>

  products: Product[] = [];
  isLoadingProducts = false;

  fetchProducts(categoryId?: number) {
    console.log(categoryId);

    this.products = [];

    if (categoryId === undefined || categoryId.toString() === "undefined") {
      return;
    }

    this.isLoadingProducts = true;
    this.productItemsService.getProducts(categoryId).subscribe(
      data => {
        this.products = data;
        this.isLoadingProducts = false;
      },
      err => {
        console.log("get error: ", err);
        this.isLoadingProducts = false;
      }
    );
  }

 <option value="undefined">Select a Category...</option>

 public categoryId?: number

 model = new ProductGroupForm();

    <div class="form-group">
      <label class="control-label">Product</label>
      <span class="glyphicon glyphicon-refresh glyphicon-spin spinner" *ngIf="isLoadingProducts"></span>
      <select class="form-control" name="productCtrl" [(ngModel)]="model.productId">
        <option value="undefined">Select a Product...</option>
        <option *ngFor="let product of products" value="{{product.productId}}">
          {{ product.productName }}
        </option>
      </select>
    </div>

/* Spinner */
.spinner {
  font-size:15px;
  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);
    }
}

>npm install
>ng build --watch

>dotnet restore
>dotnet watch run

using System;
using System.Collections.Generic;
using System.IO;
using Lucene.Net.Analysis.Standard;
using Lucene.Net.Documents;
using Lucene.Net.Index;
using Lucene.Net.Store;

namespace ShaahnamehAnalysis
{
    public static class CreateIndex
    {
        static readonly Lucene.Net.Util.Version _version = Lucene.Net.Util.Version.LUCENE_CURRENT;

        static HashSet<string> getStopWords()
        {
            var result = new HashSet<string>();
            var stopWords = new[]
            {
                "به",
                "با",
                "از",
                "تا",
                "و",
                "است",
                "هست",
                "هستم",
                "هستیم",
                "هستید",
                "هستند",
                "نیست",
                "نیستم",
                "نیستیم",
                "نیستند",
                "اما",
                "یا",
                "این",
                "آن",
                "اینجا",
                "آنجا",
                "بود",
                "باد",
                "برای",
                "که",
                "دارم",
                "داری",
                "دارد",
                "داریم",
                "دارید",
                "دارند",
                "چند",
                "را",
                "ها",
                "های",
                "می",
                "هم",
                "در",
                "باشم",
                "باشی",
                "باشد",
                "باشیم",
                "باشید",
                "باشند",
                "اگر",
                "مگر",
                "بجز",
                "جز",
                "الا",
                "اینکه",
                "چرا",
                "کی",
                "چه",
                "چطور",
                "چی",
                "چیست",
                "آیا",
                "چنین",
                "اینچنین",
                "نخست",
                "اول",
                "آخر",
                "انتها",
                "صد",
                "هزار",
                "میلیون",
                "ملیون",
                "میلیارد",
                "ملیارد",
                "یکهزار",
                "تریلیون",
                "تریلیارد",
                "میان",
                "بین",
                "زیر",
                "بیش",
                "روی",
                "ضمن",
                "همانا",
                "ای",
                "بعد",
                "پس",
                "قبل",
                "پیش",
                "هیچ",
                "همه",
                "واما",
                "شد",
                "شده",
                "شدم",
                "شدی",
                "شدیم",
                "شدند",
                "یک",
                "یکی",
                "نبود",
                "میکند",
                "میکنم",                
                "میکنیم",
                "میکنید",
                "میکنند",
                "میکنی",
                "طور",
                "اینطور",
                "آنطور",
                "هر",
                "حال",
                "مثل",
                "خواهم",
                "خواهی",
                "خواهد",
                "خواهیم",
                "خواهید",
                "خواهند",
                "داشته",
                "داشت",
                "داشتی",
                "داشتم",
                "داشتیم",
                "داشتید",
                "داشتند",
                "آنکه",
                "مورد",
                "کنید",
                "کنم",
                "کنی",
                "کنند",
                "کنیم",
                "نکنم",
                "نکنی",
                "نکند",
                "نکنیم",
                "نکنید",
                "نکنند",
                "نکن",
                "بگو",
                "نگو",
                "مگو",
                "بنابراین",
                "بدین",
                "من",
                "تو",
                "او",
                "ما",
                "شما",
                "ایشان",
                "ی",
                "ـ",
                "هایی",
                "خیلی",
                "بسیار",
                "1",
                "بر",
                "l",
                "شود",
                "کرد",
                "کرده",
                "نیز",
                "خود",
                "شوند",
                "اند",
                "داد",
                "دهد",
                "گشت",
                "ز",
                "گفت",
                "آمد",
                "اندر",
                "چون",
                "بد",
                "چو",
                "همی",
                "پر",
                "سوی",
                "دو",
                "گر",
                "بی",
                "گرد",
                "زین",
                "کس",
                "زان",
                "جای",
                "آید"
            };

            foreach (var item in stopWords)
                result.Add(item);

            return result;
        }

        public static void CreateShaahnamehIndex(string file = "shaahnameh.txt")
        {
            var directory = FSDirectory.Open(new DirectoryInfo(Environment.CurrentDirectory + "\\LuceneIndex"));
            var analyzer = new StandardAnalyzer(_version, getStopWords());
            using (var writer = new IndexWriter(directory, analyzer, create: true, mfl: IndexWriter.MaxFieldLength.UNLIMITED))
            {
                var section = string.Empty;
                foreach (var line in File.ReadAllLines(file))
                {
                    int result;
                    if (int.TryParse(line, out result))
                    {
                        var postDocument = new Document();
                        postDocument.Add(new Field("Id", result.ToString(), Field.Store.YES, Field.Index.NOT_ANALYZED));
                        postDocument.Add(new Field("Body", section, Field.Store.YES, Field.Index.ANALYZED, Field.TermVector.WITH_POSITIONS_OFFSETS));
                        writer.AddDocument(postDocument);
                        section = string.Empty;
                    }
                    else
                        section += line;
                }

                writer.Optimize();
                writer.Commit();
                writer.Close();
                directory.Close();
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using Lucene.Net.Index;
using Lucene.Net.Store;

namespace ShaahnamehAnalysis
{
    [DebuggerDisplay("{Frequency}, {Text}")]
    public class Tag
    {
        public string Text { set; get; }

        /// <summary>
        /// The frequency of a term is defined as the number of 
        /// documents in which a specific term appears.
        /// </summary>
        public int Frequency { set; get; }
    }

    public static class WordsCloud
    {
        /// <summary>
        /// Create Words Cloud
        /// </summary>
        /// <param name="threshold">every term that appears in more than x Body</param>
        public static IList<Tag> Create(int threshold = 200)
        {
            var path = Environment.CurrentDirectory + "\\LuceneIndex";

            var results = new List<Tag>();
            var field = "Body";

            IndexReader indexReader = IndexReader.Open(FSDirectory.Open(path ), true);

            var termFrequency = indexReader.Terms();
            while (termFrequency.Next())
            {
                if (termFrequency.DocFreq() >= threshold && termFrequency.Term.Field == field)
                {
                    results.Add(new Tag { Text = termFrequency.Term.Text, Frequency = termFrequency.DocFreq() });
                }
            }
            return results.OrderByDescending(x => x.Frequency).ToList();
        }
    }
}

using System;
using System.Diagnostics;
using System.IO;
using System.Linq;

namespace ShaahnamehAnalysis
{
    class Program
    {
        static void Main(string[] args)
        {
            CreateIndex.CreateShaahnamehIndex();
            var wordsCloudList = WordsCloud.Create();

            var data = wordsCloudList.Select(x => x.Text + ", " + x.Frequency)
                                     .Aggregate((s1, s2) => s1 + Environment.NewLine + s2);
            var output = "ShaahnamehAnalysis.txt";
            File.WriteAllText(output, data);
            Process.Start(output);
        }
    }
}

namespace Microsoft.Extensions.Hosting
{
    public interface IHostedService
    {
        Task StartAsync(CancellationToken cancellationToken);
        Task StopAsync(CancellationToken cancellationToken);
    }
}

using System;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;

namespace MvcTest
{
    public class SampleHostedService : IHostedService
    {
        private readonly ILogger<SampleHostedService> _logger;

        public SampleHostedService(ILogger<SampleHostedService> logger)
        {
            _logger = logger;
        }

        public async Task StartAsync(CancellationToken cancellationToken)
        {
            _logger.LogInformation("Starting Hosted service");

            while (!cancellationToken.IsCancellationRequested)
            {
                _logger.LogInformation("Hosted service executing - {0}", DateTime.Now);
                await Task.Delay(TimeSpan.FromSeconds(2), cancellationToken);
            }
        }

        public Task StopAsync(CancellationToken cancellationToken)
        {
            _logger.LogInformation("Stopping Hosted service");
            return Task.CompletedTask;
        }
    }
}

namespace MvcTest
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddSingleton<IHostedService, SampleHostedService>();

services.AddHostedService<SampleHostedService>();

 public void Configure(IApplicationBuilder app, IHostingEnvironment env)

Startup.cs(82,56): error CS0104: 'IHostingEnvironment' is an ambiguous reference between
'Microsoft.AspNetCore.Hosting.IHostingEnvironment' and 'Microsoft.Extensions.Hosting.IHostingEnvironment'

D:\MvcTest>dotnet run
info: MvcTest.SampleHostedService[0]
      Starting Hosted service
info: MvcTest.SampleHostedService[0]
      Hosted service executing - 02/19/2019 14:45:10
info: MvcTest.SampleHostedService[0]
      Hosted service executing - 02/19/2019 14:45:12
info: MvcTest.SampleHostedService[0]
      Hosted service executing - 02/19/2019 14:45:14
Ctrl+C
Application is shutting down...
Hosting environment: Development
Content root path: D:\MvcTest
Now listening on: https://localhost:5001
Now listening on: http://localhost:5000
Application started. Press Ctrl+C to shut down.

namespace Microsoft.Extensions.Hosting
{
    public abstract class BackgroundService : IHostedService, IDisposable
    {
        protected BackgroundService();
        public virtual void Dispose();
        public virtual Task StartAsync(CancellationToken cancellationToken);
        public virtual Task StopAsync(CancellationToken cancellationToken);
        protected abstract Task ExecuteAsync(CancellationToken stoppingToken);
    }
}

namespace MvcTest
{
    public class PrinterHostedService : BackgroundService
    {
        private readonly ILogger<SampleHostedService> _logger;

        public PrinterHostedService(ILogger<SampleHostedService> logger)
        {
            _logger = logger;
        }

        protected override async Task ExecuteAsync(CancellationToken stoppingToken)
        {
            _logger.LogInformation("Starting Hosted service");

            while (!stoppingToken.IsCancellationRequested)
            {
                _logger.LogInformation("Hosted service executing - {0}", DateTime.Now);
                await Task.Delay(TimeSpan.FromSeconds(2), stoppingToken);
            }
        }
    }
}

namespace MvcTest
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddHostedService<PrinterHostedService>();

D:\MvcTest>dotnet run
Hosting environment: Development
infoContent root path: D:\MvcTest
Now listening on: https://localhost:5001
Now listening on: http://localhost:5000
Application started. Press Ctrl+C to shut down.
: MvcTest.SampleHostedService[0]
      Starting Hosted service
info: MvcTest.SampleHostedService[0]
      Hosted service executing - 02/19/2019 15:00:23
info: MvcTest.SampleHostedService[0]
      Hosted service executing - 02/19/2019 15:00:25
info: MvcTest.SampleHostedService[0]
      Hosted service executing - 02/19/2019 15:00:27
Application is shutting down...
^C

using System;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

public abstract class ScopedBackgroundService : BackgroundService
{
    private readonly IServiceScopeFactory _serviceScopeFactory;

    public ScopedBackgroundService(IServiceScopeFactory serviceScopeFactory)
    {
        _serviceScopeFactory = serviceScopeFactory;
    }

    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
    {
        using (var scope = _serviceScopeFactory.CreateScope())
        {
            await ExecuteInScope(scope.ServiceProvider, stoppingToken);
        }
    }

    public abstract Task ExecuteInScope(IServiceProvider serviceProvider, CancellationToken stoppingToken);
}

 dotnet add package ncrontab

┌───────────── minute (0 - 59) 
│ ┌───────────── hour (0 - 23) 
│ │ ┌───────────── day of month (1 - 31) 
│ │ │ ┌───────────── month (1 - 12) 
│ │ │ │ ┌───────────── day of week (0 - 6) (Sunday to Saturday; 
│ │ │ │ │                                       7 is also Sunday on some systems) 
│ │ │ │ │ 
│ │ │ │ │ 
* * * * *

* * * * * *
- - - - - -
| | | | | |
| | | | | +--- day of week (0 - 6) (Sunday=0)
| | | | +----- month (1 - 12)
| | | +------- day of month (1 - 31)
| | +--------- hour (0 - 23)
| +----------- min (0 - 59)
+------------- sec (0 - 59)

using System;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.DependencyInjection;
using NCrontab;
using static NCrontab.CrontabSchedule;

public abstract class ScheduledScopedBackgroundService : ScopedBackgroundService
{
    private CrontabSchedule _schedule;
    private DateTime _nextRun;

    protected abstract string Schedule { get; }

    public ScheduledScopedBackgroundService(IServiceScopeFactory serviceScopeFactory)
     : base(serviceScopeFactory)
    {
        _schedule = CrontabSchedule.Parse(Schedule, new ParseOptions { IncludingSeconds = true });
        _nextRun = _schedule.GetNextOccurrence(DateTime.Now);
    }

    public override async Task ExecuteInScope(IServiceProvider serviceProvider, CancellationToken stoppingToken)
    {
        do
        {
            var now = DateTime.Now;
            if (now > _nextRun)
            {
                await ScheduledExecuteInScope(serviceProvider, stoppingToken);
                _nextRun = _schedule.GetNextOccurrence(DateTime.Now);
            }
            await Task.Delay(1000, stoppingToken); //1 second delay
        }
        while (!stoppingToken.IsCancellationRequested);
    }

    public abstract Task ScheduledExecuteInScope(IServiceProvider serviceProvider, CancellationToken stoppingToken);
}

using System;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;

public class MyScheduledTask : ScheduledScopedBackgroundService
{
    private readonly ILogger<MyScheduledTask> _logger;

    public MyScheduledTask(
        IServiceScopeFactory serviceScopeFactory,
        ILogger<MyScheduledTask> logger) : base(serviceScopeFactory)
    {
        _logger = logger;
    }

    protected override string Schedule => "*/10 * * * * *"; //Runs every 10 seconds

    public override Task ScheduledExecuteInScope(IServiceProvider serviceProvider, CancellationToken stoppingToken)
    {
        _logger.LogInformation("MyScheduledTask executing - {0}", DateTime.Now);
        return Task.CompletedTask;
    }
}

namespace MvcTest
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddHostedService<MyScheduledTask>();

D:\MvcTest>dotnet run
Hosting environment: Development
Content root path: D:\MvcTest
Now listening on: https://localhost:5001
Now listening on: http://localhost:5000
Application started. Press Ctrl+C to shut down.
info: MyScheduledTask[0]
      MyScheduledTask executing - 02/19/2019 19:18:50
info: MyScheduledTask[0]
      MyScheduledTask executing - 02/19/2019 19:19:00
info: MyScheduledTask[0]
      MyScheduledTask executing - 02/19/2019 19:19:10
Application is shutting down...
^C

public class ValueModel
{
    [Required]
    [Display(Name = "Decimal Value")]
    public decimal DecimalValue { get; set; }

    [Required]
    [Display(Name = "Double Value")]
    public double DoubleValue { get; set; }

    [Required]
    [Display(Name = "Integer Value")]
    public int IntegerValue { get; set; }

    [Required]
    [Display(Name = "Date Value")]
    public DateTime DateValue { get; set; }
}

[HttpPost]
public ActionResult Index(ValueModel valueModel)
{
    if (ModelState.IsValid)
    {
        return Redirect("Index");
    }

    return View(valueModel);
}

<globalization culture="fa-IR" uiCulture="fa-IR" />

@using (Html.BeginForm())
{
    <ol>
        <li>
            @Html.LabelFor(m => m.DecimalValue)
            @Html.TextBoxFor(m => m.DecimalValue)
            @Html.ValidationMessageFor(m => m.DecimalValue)
        </li>
        <li>
            @Html.LabelFor(m => m.DoubleValue)
            @Html.TextBoxFor(m => m.DoubleValue)
            @Html.ValidationMessageFor(m => m.DoubleValue)
        </li>
        <li>
            @Html.LabelFor(m => m.IntegerValue)
            @Html.TextBoxFor(m => m.IntegerValue)
            @Html.ValidationMessageFor(m => m.IntegerValue)
        </li>
        <li>
            @Html.LabelFor(m => m.DateValue)
            @Html.TextBoxFor(m => m.DateValue)
            @Html.ValidationMessageFor(m => m.DateValue)
        </li>
        <li>
            <input type="submit" value="Submit"/>
        </li>
    </ol>
}

PM> Install-Package jquery-globalize

<script src="~/Scripts/jquery.validate.js"> </script>
<script src="~/Scripts/jquery.validate.unobtrusive.js"> </script>
<script src="~/Scripts/jquery.globalize/globalize.js"> </script>
<script src="~/Scripts/jquery.globalize/cultures/globalize.culture.fa-IR.js"> </script>

numberFormat: {
    pattern: ["n-"],
    ".": "/",
    currency: {
        pattern: ["$n-", "$ n"],
        ".": "/",
        symbol: "ریال"
    }
},

Globalize.culture('fa-IR');
$.validator.methods.number = function(value, element) {
    if (value.indexOf('.') > 0) {
        return false;
    }
    var splitedValue = value.split('/');
    if (splitedValue.length === 1) {
        return !isNaN(Globalize.parseInt(value));
    } else if (splitedValue.length === 2 && $.trim(splitedValue[1]).length === 0) {
        return false;
    }
    return !isNaN(Globalize.parseFloat(value));
};
};

Gregorian_Localized: {
    firstDay: 6,
    days: {
        names: ["یکشنبه", "دوشنبه", "سه شنبه", "چهارشنبه", "پنجشنبه", "جمعه", "شنبه"],
        namesAbbr: ["یکشنبه", "دوشنبه", "سه شنبه", "چهارشنبه", "پنجشنبه", "جمعه", "شنبه"],
        namesShort: ["ی", "د", "س", "چ", "پ", "ج", "ش"]
    },
    months: {
        names: ["ژانویه", "فوریه", "مارس", "آوریل", "می", "ژوئن", "ژوئیه", "اوت", "سپتامبر", "اُکتبر", "نوامبر", "دسامبر", ""],
        namesAbbr: ["ژانویه", "فوریه", "مارس", "آوریل", "می", "ژوئن", "ژوئیه", "اوت", "سپتامبر", "اُکتبر", "نوامبر", "دسامبر", ""]
    },
    AM: ["ق.ظ", "ق.ظ", "ق.ظ"],
    PM: ["ب.ظ", "ب.ظ", "ب.ظ"],
    patterns: {
        d: "yyyy/MM/dd",
        D: "yyyy/MM/dd",
        t: "hh:mm tt",
        T: "hh:mm:ss tt",
        f: "yyyy/MM/dd hh:mm tt",
        F: "yyyy/MM/dd hh:mm:ss tt",
        M: "dd MMMM"
    },
    JalaliDate: {
        g_days_in_month: [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],
        j_days_in_month: [31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 29]
    },
    gregorianToJalali: function (gY, gM, gD) {
        gY = parseInt(gY);
        gM = parseInt(gM);
        gD = parseInt(gD);
        var gy = gY - 1600;
        var gm = gM - 1;
        var gd = gD - 1;

        var gDayNo = 365 * gy + parseInt((gy + 3) / 4) - parseInt((gy + 99) / 100) + parseInt((gy + 399) / 400);

        for (var i = 0; i < gm; ++i)
            gDayNo += Globalize.culture().calendars.Gregorian_Localized.JalaliDate.g_days_in_month[i];
        if (gm > 1 && ((gy % 4 == 0 && gy % 100 != 0) || (gy % 400 == 0)))
            /* leap and after Feb */
            ++gDayNo;
        gDayNo += gd;

        var jDayNo = gDayNo - 79;

        var jNp = parseInt(jDayNo / 12053);
        jDayNo %= 12053;

        var jy = 979 + 33 * jNp + 4 * parseInt(jDayNo / 1461);

        jDayNo %= 1461;

        if (jDayNo >= 366) {
            jy += parseInt((jDayNo - 1) / 365);
            jDayNo = (jDayNo - 1) % 365;
        }

        for (var i = 0; i < 11 && jDayNo >= Globalize.culture().calendars.Gregorian_Localized.JalaliDate.j_days_in_month[i]; ++i) {
            jDayNo -= Globalize.culture().calendars.Gregorian_Localized.JalaliDate.j_days_in_month[i];
        }
        var jm = i + 1;
        var jd = jDayNo + 1;

        return [jy, jm, jd];
    },
    jalaliToGregorian: function (jY, jM, jD) {
        jY = parseInt(jY);
        jM = parseInt(jM);
        jD = parseInt(jD);
        var jy = jY - 979;
        var jm = jM - 1;
        var jd = jD - 1;

        var jDayNo = 365 * jy + parseInt(jy / 33) * 8 + parseInt((jy % 33 + 3) / 4);
        for (var i = 0; i < jm; ++i) jDayNo += Globalize.culture().calendars.Gregorian_Localized.JalaliDate.j_days_in_month[i];

        jDayNo += jd;

        var gDayNo = jDayNo + 79;

        var gy = 1600 + 400 * parseInt(gDayNo / 146097); /* 146097 = 365*400 + 400/4 - 400/100 + 400/400 */
        gDayNo = gDayNo % 146097;

        var leap = true;
        if (gDayNo >= 36525) /* 36525 = 365*100 + 100/4 */ {
            gDayNo--;
            gy += 100 * parseInt(gDayNo / 36524); /* 36524 = 365*100 + 100/4 - 100/100 */
            gDayNo = gDayNo % 36524;

            if (gDayNo >= 365)
                gDayNo++;
            else
                leap = false;
        }

        gy += 4 * parseInt(gDayNo / 1461); /* 1461 = 365*4 + 4/4 */
        gDayNo %= 1461;

        if (gDayNo >= 366) {
            leap = false;

            gDayNo--;
            gy += parseInt(gDayNo / 365);
            gDayNo = gDayNo % 365;
        }

        for (var i = 0; gDayNo >= Globalize.culture().calendars.Gregorian_Localized.JalaliDate.g_days_in_month[i] + (i == 1 && leap) ; i++)
            gDayNo -= Globalize.culture().calendars.Gregorian_Localized.JalaliDate.g_days_in_month[i] + (i == 1 && leap);
        var gm = i + 1;
        var gd = gDayNo + 1;

        return [gy, gm, gd];
    },
    checkDate: function (jY, jM, jD) {
        return !(jY < 0 || jY > 32767 || jM < 1 || jM > 12 || jD < 1 || jD >
            (Globalize.culture().calendars.Gregorian_Localized.JalaliDate.j_days_in_month[jM - 1] + (jM == 12 && !((jY - 979) % 33 % 4))));
    },
    convert: function (value, format) {
        var day, month, year;

        var formatParts = format.split('/');
        var dateParts = value.split('/');
        if (formatParts.length !== 3 || dateParts.length !== 3) {
            return false;
        }

        for (var j = 0; j < formatParts.length; j++) {
            var currentFormat = formatParts[j];
            var currentDate = dateParts[j];
            switch (currentFormat) {
                case 'dd':
                    if (currentDate.length === 2 || currentDate.length === 1) {
                        day = currentDate;
                    } else {
                        year = currentDate;
                    }
                    break;
                case 'MM':
                    month = currentDate;
                    break;
                case 'yyyy':
                    if (currentDate.length === 4) {
                        year = currentDate;
                    } else {
                        day = currentDate;
                    }
                    break;
                default:
                    return false;
            }
        }

        year = parseInt(year);
        month = parseInt(month);
        day = parseInt(day);
        var isValidDate = Globalize.culture().calendars.Gregorian_Localized.checkDate(year, month, day);
        if (!isValidDate) {
            return false;
        }

        var grDate = Globalize.culture().calendars.Gregorian_Localized.jalaliToGregorian(year, month, day);
        var shDate = Globalize.culture().calendars.Gregorian_Localized.gregorianToJalali(grDate[0], grDate[1], grDate[2]);

        if (year === shDate[0] && month === shDate[1] && day === shDate[2]) {
            return true;
        }

        return false;
    }
},

$.validator.methods.date = function (value, element) {
    return Globalize.culture().calendars.Gregorian_Localized.convert(value, 'yyyy/MM/dd');
};

قدم بعدی افزودن کدهای سمت کلاینت برای SignalR می‌باشد. دقت داشته باشید که کدهایی که در ادامه مشاهده خواهید کرد دقیقاً مطابق دستورالمعل‌هایی است که قبلاً مشاهده کرده‌اید. برای اینکار داخل کلاس MainActivity.java کدهای زیر را اضافه کنید:

Platform.loadPlatformComponent( new AndroidPlatformComponent() );
HubConnection connection = new HubConnection(DEFAULT_SERVER_URL);
HubProxy hub = connection.createHubProxy("ChatHub");
connection.error(new ErrorCallback() {
    
    @Override
    public void onError(final Throwable error) {
        runOnUiThread(new Runnable() {
            public void run() {
                Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_LONG).show();
            }
        });
        
    }
});
hub.subscribe(new Object() {
    @SuppressWarnings("unused")
    public void messageReceived(final String name, final String message) {
        
        runOnUiThread(new Runnable() {
            public void run() {
                Toast.makeText(getApplicationContext(), name + ": " + message, Toast.LENGTH_LONG).show();
            }
        });
    }
});
connection.start()
.done(new Action<Void>() {
    
    @Override
    public void run(Void obj) throws Exception {
        runOnUiThread(new Runnable() {
            public void run() {
                Toast.makeText(getApplicationContext(), "Done Connecting!", Toast.LENGTH_LONG).show();
            }
        });
    }
});
connection.received(new MessageReceivedHandler() {
    @Override
    public void onMessageReceived(final JsonElement json) {
        runOnUiThread(new Runnable() {
            public void run() {
                JsonObject jsonObject = json.getAsJsonObject();
                JsonArray jsonArray =jsonObject.getAsJsonArray("A");
                Toast.makeText(getApplicationContext(), jsonArray.get(0).getAsString() + ": " + jsonArray.get(1).getAsString(), Toast.LENGTH_LONG).show();
            }
        });
    }
});

همانطور که مشاهده می‌کنید توسط قطعه کد زیر SKD مربوطه در نسخه‌های قدیمی اندروید نیز بدون مشکل کار خواهد کرد:

Platform.loadPlatformComponent( new AndroidPlatformComponent() );

در ادامه توسط متد createHubProxy ارجاعی به هابی که در سمت سرور ایجاد کردیم، داده‌ایم:

HubProxy hub = connection.createHubProxy("ChatHub");

در ادامه نیز توسط یک روال رویدادگردان وضعیت اتصال را چک کرده‌ایم. یعنی در زمان بروز خطا در نحوه ارتباط یک پیام بر روی صفحه نمایش داده می‌شود:

connection.error(new ErrorCallback() {
    
    @Override
    public void onError(final Throwable error) {
        runOnUiThread(new Runnable() {
            public void run() {
                Toast.makeText(getApplicationContext(), error.getMessage(), Toast.LENGTH_LONG).show();
            }
        });
        
    }
});

hub.subscribe(new Object() {
    @SuppressWarnings("unused")
    public void messageReceived(final String name, final String message) {
        
        runOnUiThread(new Runnable() {
            public void run() {
                Toast.makeText(getApplicationContext(), name + ": " + message, Toast.LENGTH_LONG).show();
            }
        });
    }
});

connection.start()
.done(new Action<Void>() {
    
    @Override
    public void run(Void obj) throws Exception {
        runOnUiThread(new Runnable() {
            public void run() {
                Toast.makeText(getApplicationContext(), "Done Connecting!", Toast.LENGTH_LONG).show();
            }
        });
    }
});

connection.received(new MessageReceivedHandler() {
    @Override
    public void onMessageReceived(final JsonElement json) {
        runOnUiThread(new Runnable() {
            public void run() {
                JsonObject jsonObject = json.getAsJsonObject();
                JsonArray jsonArray =jsonObject.getAsJsonArray("A");
                Toast.makeText(getApplicationContext(), jsonArray.get(0).getAsString() + ": " + jsonArray.get(1).getAsString(), Toast.LENGTH_LONG).show();
            }
        });
    }
});

using System;
using System.Linq;
using System.Web.Mvc;
using System.Security.Cryptography;
using System.Text;
using System.Web.Caching;

namespace Parsnet.Core
{
    public class StopSpamAttribute : ActionFilterAttribute
    {
        // حداقل زمان مجاز بین درخواست‌ها برحسب ثانیه
        public int DelayRequest = 10;

        // پیام خطایی که در صورت رسیدن درخواست غیرمجاز باید صادر کنیم
        public string ErrorMessage = "درخواست‌های شما در مدت زمان معقولی صورت نگرفته است.";

        //خصوصیتی برای تعیین اینکه آدرس درخواست هم به شناسه یکتا افزوده شود یا خیر
        public bool AddAddress = true;


        public override void OnActionExecuting(ActionExecutingContext filterContext)
        {
            // درسترسی به شئی درخواست
            var request = filterContext.HttpContext.Request;

            // دسترسی به شیئ کش
            var cache = filterContext.HttpContext.Cache;

            // کاربر IP بدست آوردن
            var IP = request.ServerVariables["HTTP_X_FORWARDED_FOR"] ?? request.UserHostAddress;

            // مشخصات مرورگر
            var browser = request.UserAgent;

            // در اینجا آدرس درخواست جاری را تعیین می‌کنیم
            var targetInfo = (this.AddAddress) ? (request.RawUrl + request.QueryString) : "";

            // شناسه یکتای درخواست
            var Uniquely = String.Concat(IP, browser, targetInfo);


            //در اینجا با کمک هش یک امضا از شناسه‌ی درخواست ایجاد می‌کنیم
            var hashValue = string.Join("", MD5.Create().ComputeHash(Encoding.ASCII.GetBytes(Uniquely)).Select(s => s.ToString("x2")));

            // ابتدا چک می‌کنیم که آیا شناسه‌ی یکتای درخواست در کش موجود نباشد
            if (cache[hashValue] != null)
            {
                // یک خطا اضافه می‌کنیم ModelState اگر موجود بود یعنی کمتر از زمان موردنظر درخواست مجددی صورت گرفته و به
                filterContext.Controller.ViewData.ModelState.AddModelError("ExcessiveRequests", ErrorMessage);
            }
            else
            {
                // اگر موجود نبود یعنی درخواست با زمانی بیشتر از مقداری که تعیین کرده‌ایم انجام شده
                // پس شناسه درخواست جدید را با پارامتر زمانی که تعیین کرده بودیم به شیئ کش اضافه می‌کنیم
                cache.Add(hashValue, true, null, DateTime.Now.AddSeconds(DelayRequest), Cache.NoSlidingExpiration, CacheItemPriority.Default, null);
            }

            base.OnActionExecuting(filterContext);
        }
    }
}

[HttpPost]
        [StopSpam(DelayRequest = 5)]
        [ValidateAntiForgeryToken]
        public virtual async Task<ActionResult> SendFile(HttpPostedFileBase file, int userid = 0)
        { 
        
        }

[HttpPost]
        [StopSpam(DelayRequest = 30, ErrorMessage = "زمان لازم بین ارسال هر مطلب 30 ثانیه است")]
        [ValidateAntiForgeryToken]
        public virtual async Task<ActionResult> InsertPost(NewPostModel model)
        {
     
        }

        [HttpPost]
        [StopSpam(AddAddress = true, DelayRequest = 20)]
        [ValidateAntiForgeryToken]
        public Task<ActionResult> InsertPost(NewPostModel model)
        {
            if (ModelState.IsValid)
            {
                var newPost = dbContext.InsertPost(model);
                if (newPost != null)
                {
                    ViewBag.ExecuteResult = true;
                }
            }

            if (ModelState.IsValidField("ExcessiveRequests") == true)


            {


                ViewBag.ExecuteResult = false;


           }


            return View();
        }

/// <summary>
/// افزودن و مدیریت کاربران سیستم
/// </summary>
[PageAuthorization(AuthorizationType.ApplyRequiredRoles, "IsAdmin, CanAddNewUser")]

                <Button Style="{DynamicResource MetroCircleButtonStyle}"
                        Height="55" Width="55"  
                        Command="{Binding DoNavigate}"
                        CommandParameter="\Views\Admin\AddNewUser.xaml"
                        Margin="2">
                    <Rectangle Width="28" Height="17.25">
                        <Rectangle.Fill>
                            <VisualBrush Stretch="Fill" Visual="{StaticResource appbar_user_add}" />
                        </Rectangle.Fill>
                    </Rectangle>
                </Button>

public ObservableCollection<User> UsersList { set; get; }

        /// <summary>
        /// جهت مقاصد انقیاد داده‌ها در دبلیو پی اف طراحی شده است
        /// لیستی از کاربران سیستم را باز می‌گرداند
        /// </summary>
        /// <param name="count">تعداد کاربر مد نظر</param>
        /// <returns>لیستی از کاربران</returns>
        public ObservableCollection<User> GetSyncedUsersList(int count = 1000)
        {
            _users.OrderBy(x => x.FriendlyName).Take(count)
                  .Load();

            // For Databinding with WPF.
            // Before calling this method you need to fill the context by using `Load()` method.
            return _users.Local;
        }

  /// <summary>
  /// فعال و غیرفعال سازی خودکار دکمه ثبت
  /// این متد به صورت خودکار توسط RelayCommand کنترل می‌شود
  /// </summary>  
  private bool canDoSave()
  {
     // آیا در حین نمایش صفحه‌ای دیگر باید به کاربر پیغام داد که اطلاعات ذخیره نشده‌ای وجود دارد؟
     return ViewModelContextHasChanges;
  }

  /// <summary>
  /// رخداد ذخیره سازی اطلاعات را دریافت می‌کند
  /// </summary>
  public RelayCommand DoSave { set; get; }

DoSave = new RelayCommand(doSave, canDoSave);