<h3>Angular Forms</h3>
<form #form="ngForm">
    <input type="text" placeholder="Name">
    <button type="submit">Ok</button>
</form>

form.pristine: {{ form.pristine }}

 There is no directive with "exportAs" set to "ngForm"

<h3>Angular Forms</h3>
<form #form="ngForm">
    <input type="text" placeholder="Name" name="name" ngModel>
    <button type="submit">Ok</button>
</form>

form.pristine: {{ form.pristine }}

 Error: If ngModel is used within a form tag, either the name attribute must be set or the form
control must be defined as 'standalone' in ngModelOptions.

<input type="text" required placeholder="Name" name="name" ngModel>

<form #form="ngForm" novalidate>

<div class="container">
    <h3>Angular Forms</h3>
    <form #form="ngForm" novalidate>
        <div class="form-group">
            <label>First Name</label>
            <input type="text" class="form-control" required name="firstName" ngModel>
        </div>
        <div class="form-group">
            <label>Last Name</label>
            <input type="text" class="form-control" required name="lastName" ngModel>
        </div>
        <button class="btn btn-primary" type="submit">Ok</button>
    </form>
</div>

form.pristine: {{ form.pristine }}

        <div class="checkbox">
            <label>
                <input type="checkbox" name="is-full-time" ngModel> Full Time Employee
            </label>
        </div>

        <label>Payment Type</label>
        <div class="radio">
            <label>
                <input type="radio" name="pay-type" value="FullTime" checked>
                Full Time
            </label>
        </div>
        <div class="radio">
            <label>
                <input type="radio" name="pay-type" value="PartTime">
                Part Time
            </label>
        </div>

        <div class="form-group">
            <label>Primary Language</label>
            <select class="form-control">
                <option *ngFor="let lang of languages">
                    {{ lang }}
                </option>
            </select>
        </div>

export class EmployeeRegisterComponent implements OnInit {
  languages = ["Persian", "English", "Spanish", "Other"];

<select class="form-control">
  <option>Persian</option>
  <option>English</option>
  <option>Spanish</option>
  <option>Other</option>
</select>

static async IAsyncEnumerable<int> RangeAsync(int start, int count)
{
  for (int i = 0; i < count; i++)
  {
    await Task.Delay(i);
    yield return start + i;
  }
}

    [ApiController]
    [Route("[controller]")]
    public class CustomerController : ControllerBase
    {
        private readonly IDictionary<int, Customer> _customers;
        private void FillCustomerFromMemory(int countOfCustomer)
        {
            for (int CustomerId = 1; CustomerId <= countOfCustomer; CustomerId++)
            {
                _customers.Add(key: CustomerId, new Customer($"name_{CustomerId}", CustomerId));
            }
        }
        public CustomerController()
        {
            _customers = new Dictionary<int, Customer>();
            FillCustomerFromMemory(countOfCustomer : 100);
        }
        [HttpGet]
        public async Task<IEnumerable<Customer>> Get()
        {
            var output = new List<Customer>();
            while (_customers.Any(_ => _.Key % 10 == 0))
            {
                var customer = _customers.First(_ => _.Key % 10 == 0);
                output.Add(new Customer(customer.Value.Name, customer.Key));
                await Task.Delay(500);
                _customers.Remove(customer);
            }
            return output;
        }

        public class Customer
        {
            public int Id { get; private set; }

            public string Name { get; private set; }
            public Customer(string name, int id)
            {
                Name = name;
                Id = id;
            }
        }
    }

  [HttpGet]
        public async IAsyncEnumerable<Customer> Get()
        {
            while (_customers.Any(_ => _.Key % 10 == 0))
            {
                var customer = _customers.First(_ => _.Key % 10 == 0);
                yield return new Customer(customer.Value.Name, customer.Key);
                _customers.Remove(customer);
                await Task.Delay(500);
            }
        }

const int TARGET = 80;
var _httpClient = new HttpClient();
using (var response = await _httpClient.GetAsync(
    "https://localhost:7284/customer",
     HttpCompletionOption.ResponseHeadersRead))
{
    var stream = await response.Content.ReadAsStreamAsync();

    var _jsonSerializerSettings = new JsonSerializerSettings();
    var _serializer = Newtonsoft.Json.JsonSerializer.Create(_jsonSerializerSettings);

    using TextReader textReader = new StreamReader(stream);
    using JsonReader jsonReader = new JsonTextReader(textReader);

    await using (stream.ConfigureAwait(false))
    {
        await jsonReader.ReadAsync().ConfigureAwait(false);
        while (await jsonReader.ReadAsync().ConfigureAwait(false) &&
               jsonReader.TokenType != JsonToken.EndArray)
        {
            Customer customer = _serializer!.Deserialize<Customer>(jsonReader);
            if (customer.Id == TARGET)
            {
                Console.WriteLine(customer.Id + " : " + customer.Name);
                break;
            }
        }
    }
}

[HttpGet]
        public async IAsyncEnumerable<Customer> Get(CancellationToken cancellationToken)
        {
            while (!cancellationToken.IsCancellationRequested && _customers.Any(_ => _.Key % 10 == 0))
            {
                var customer = _customers.First(_ => _.Key % 10 == 0);
                yield return new Customer(customer.Value.Name, customer.Key);
                _customers.Remove(customer);
                await Task.Delay(500,cancellationToken);
            }
        }

const int TARGET = 80;
var _httpClient = new HttpClient();
var _cancelationTokenSource = new CancellationTokenSource();

using (var response = await _httpClient.GetAsync(
    "https://localhost:7284/customer",
     HttpCompletionOption.ResponseHeadersRead,
     _cancelationTokenSource.Token))
{
    var stream = await response.Content.ReadAsStreamAsync(_cancelationTokenSource.Token);

    var _jsonSerializerSettings = new JsonSerializerSettings();
    var _serializer = Newtonsoft.Json.JsonSerializer.Create(_jsonSerializerSettings);

    using TextReader textReader = new StreamReader(stream);
    using JsonReader jsonReader = new JsonTextReader(textReader);

    await using (stream.ConfigureAwait(false))
    {
        await jsonReader.ReadAsync(_cancelationTokenSource.Token).ConfigureAwait(false);
        while (await jsonReader.ReadAsync(_cancelationTokenSource.Token).ConfigureAwait(false) &&
               jsonReader.TokenType != JsonToken.EndArray)
        {
            Customer customer = _serializer!.Deserialize<Customer>(jsonReader);
            if (customer.Id == TARGET)
            {
                Console.WriteLine(customer.Id + " : " + customer.Name);
                _cancelationTokenSource.Cancel();
                break;
            }
        }
    }
}

        public static int ToInt(this string data)
        {
            if (string.IsNullOrWhiteSpace(data)) return 0;
            int result;
            return int.TryParse(data, out result) ? result : 0;
        }

FormsAuthentication.SetAuthCookie(user.Id.ToString(CultureInfo.InvariantCulture), ...
// ...
FormsAuthentication.RedirectFromLoginPage(user.Id.ToString(CultureInfo.InvariantCulture), ...

import { NgModule } from "@angular/core";
import { CommonModule } from "@angular/common";
import { BsDropdownModule } from "ngx-bootstrap/dropdown";
import { TooltipModule } from "ngx-bootstrap/tooltip";
import { ModalModule } from "ngx-bootstrap/modal";

@NgModule({
  imports: [
    CommonModule,
    BsDropdownModule.forRoot(),
    TooltipModule.forRoot(),
    ModalModule.forRoot()
  ],
  exports: [
    BsDropdownModule,
    TooltipModule,
    ModalModule
  ]
})
export class SharedBootstrapModule { }

import { SharedBootstrapModule } from './shared/shared.bootstrap.module';
@NgModule({
  imports: [BrowserModule, SharedBootstrapModule],
  // ...
})
export class AppModule {}

import { SharedBootstrapModule } from "./shared.bootstrap.module";

@NgModule({
  imports: [
    CommonModule,
    SharedBootstrapModule
  ],
  exports: [
    CommonModule,
    SharedBootstrapModule
  ]
})

import { Component, OnInit, TemplateRef } from "@angular/core";
import { BsModalRef, BsModalService } from "ngx-bootstrap";

@Component({
  selector: "app-modal-dialog-test",
  templateUrl: "./modal-dialog-test.component.html",
  styleUrls: ["./modal-dialog-test.component.css"]
})
export class ModalDialogTestComponent implements OnInit {

  modalRef: BsModalRef;

  constructor(private modalService: BsModalService) { }

  openModal(template: TemplateRef<any>) {
    this.modalRef = this.modalService.show(template,
      { animated: true, keyboard: true, backdrop: true, ignoreBackdropClick: false });
  }

  closeModal() {
    this.modalRef.hide();
  }
}

<h1>Displaying modal bootstrap dialogs</h1>

<button type="button" class="btn btn-info" (click)="openModal(template1)">Create template modal</button>

<ng-template #template1>
  <div class="modal-header">
    <h4 class="modal-title pull-left">Modal</h4>
    <button type="button" class="close pull-right" aria-label="Close" (click)="closeModal()">
      <span aria-hidden="true">&times;</span>
    </button>
  </div>
  <div class="modal-body">
    This is a modal.
  </div>
</ng-template>

 ng g c Shared/ConfirmModal --skip-import

import { ConfirmModalComponent } from "./confirm-modal/confirm-modal.component";

@NgModule({
  imports: [
  ],
  entryComponents: [
    ConfirmModalComponent
  ],
  declarations: [
    ConfirmModalComponent
  ]
})
export class SharedModule {}

import { Component } from "@angular/core";

@Component({
  selector: "app-confirm-modal",
  templateUrl: "./confirm-modal.component.html",
  styleUrls: ["./confirm-modal.component.css"]
})
export class ConfirmModalComponent {

  args: {
    title: string;
    message: string;
  };

  close: (val?: any) => void;

}

<div class="modal-header">
  <h4 class="modal-title pull-left">{{ args?.title }}</h4>
  <button type="button" class="close pull-right" aria-label="Close" (click)="close()">
    <span aria-hidden="true">&times;</span>
  </button>
</div>
<div class="modal-body">
  <p>{{ args?.message }}</p>
</div>
<div class="modal-footer">
  <button class="btn btn-danger" (click)="close(true)">Yes</button>
  <button class="btn btn-primary" (click)="close()">Cancel</button>
</div>

 >ng g s Core/Modal

import { Injectable } from "@angular/core";
import { BsModalService } from "ngx-bootstrap";

@Injectable()
export class ModalService {

  constructor(private bsModalService: BsModalService) { }

  show(component: any, args?: any, options?: any): Promise<any> {
    return new Promise(resolve => {
      options = options || {};
      const modal = this.bsModalService.show(component, options);
      let result: any;
      const sub = this.bsModalService.onHidden.subscribe(() => {
        sub.unsubscribe();
        resolve(result);
      });
      modal.content.args = args;
      modal.content.close = (val?: any) => {
        result = val;
        modal.hide();
      };
    });
  }
}

import { ModalService } from "./modal.service";

@NgModule({
  providers: [
    ModalService
  ]
})
export class CoreModule {}

<button type="button" class="btn btn-danger" (click)="deleteRecord()">Delete record</button>
<div *ngIf="confirmResult" class="alert alert-info">{{confirmResult}}</div>

import { ModalService } from "./../../core/modal.service";
import { ConfirmModalComponent } from "./../../shared/confirm-modal/confirm-modal.component";

export class ModalDialogTestComponent implements OnInit {

  confirmResult: string;

  constructor(private modalService: ModalService) { }

  deleteRecord() {
    this.confirmResult = "";
    this.modalService.show(
      ConfirmModalComponent,
      {
        title: "Confirm", message: "Do you want to delete this record?"
      },
      {
        animated: true, keyboard: true, backdrop: true, ignoreBackdropClick: false
      }).then(confirmed => {
        if (confirmed) {
          this.confirmResult = "Deleted!";
        } else {
          this.confirmResult = "Canceled!";
        }
      });
  }
}

۴. دریافت پرس‌و‌جوهای (Queries) مرتب/فیلتر/صفحه‌بندی با اضافه کردن SieveModel به کنترلر (Controller)

[HttpGet]
public JsonResult GetPosts(SieveModel sieveModel) 
{
    var result = _dbContext.Posts;
    result = _sieveProcessor.Apply(sieveModel, result);
    return Json(result.ToList());
}

۵. ارسال درخواست

GET /GetPosts

?sorts=     LikeCount,CommentCount,-created         // sort by likes, then comments, then descendingly by date created 
&filters=   LikeCount>10,Title@=awesome title,      // filter to posts with more than 10 likes, and a title that contains the phrase "awesome title"
&page=      1                                       // get the first page...
&pageSize=  10                                      // ...which contains 10 posts

{
    "Sieve": {
        "CaseSensitive": "boolean: should property names be case-sensitive? Defaults to false",
        "DefaultPageSize": "int number: optional number to fallback to when no page argument is given. Set <=0 to disable paging if no pageSize is specified (default).",
        "MaxPageSize": "int number: maximum allowed page size. Set <=0 to make infinite (default)",
        "ThrowExceptions": "boolean: should Sieve throw exceptions instead of silently failing? Defaults to false"
    }
}

services.Configure<SieveOptions>(Configuration.GetSection("Sieve"));

//new group
    $("#NewGroup").on('click', function () {
        var catName = 'new';// $("#appendNodeText").val();
        $.ajax({
            dataType: "json",
            type: "POST",
            url: "@Url.Action(MVC.Categories.NewCategory())",
            data: { name: catName }

        }).done(function (data) {
            alert(data);
        });
    });