data: "{'username': '" + $('#<%= TextBox1.ClientID %>').val() + "'}",

3- ممکن است بخواهید هنگام رفتن از صفحه‌ای به صفحه دیگر، پارامتر نیز ارسال کنید. اگر برای مثال صفحه اول لیست محصولات را نمایش می‌دهد و با زدن روی هر محصول قرار است به صفحه‌ای برویم که جزئیات آن محصول را ببینیم، بهتر است Id آن محصول به صورت پارامتر به صفحه دوم ارسال شود. برای این کار داریم:

await NavigationService.NavigateAsync("ProductDetail", new NavigationParameters
{
      { "productId", productId }
});

حال سؤال این است که در صفحه جزئیات یک محصول، چگونه productId را بگیریم؟ فرض کنید دو صفحه ProductsList و ProductDetail را داریم. هر صفحه دارای View و View Model است. در ViewModel مربوط به ProductDetail، یعنی ProductDetailViewModel که از BitViewModelBase ارث بری کرده‌است، می‌توانیم متد OnNavigatedToAsync را override کنیم. در آنجا به پارامترهای ارسال شده دسترسی داریم:

public async override Task OnNavigatedToAsync(INavigationParameters parameters)
{
      await base.OnNavigatedToAsync(parameters);
      Guid productId = parameters.GetValue<Guid>("productId");
}

هر ViewModel علاوه بر OnNavigatedTo می تواند دارای OnNavigatedFrom هم باشد که زمانیکه داریم از صفحه مربوطه خارج می‌شویم، فراخوانی می‌شود.

4- برای نمایش صفحه به صورت Popup کافی است بجای اینکه View ما یک Content Page باشد، یک PopupPage باشد (برای درک بهتر، فایل IntroView.xaml را در فولدر Views باز کنید).

حتی می‌توانید Animation مربوط به باز شدن پاپ آپ را هم کاملا Customize کنید. مثلا زمان باز شدن، از سمت راست صفحه وارد شود و زمان خارج شدن، Fade out شود. باز کردن Popup در Navigation Page معنی نمی‌دهد، پس با Nav/ در اینجا کاری نداریم. در مثال ما، بعد از لاگین می‌خواهیم یک صفحه Intro شامل هشدارها و راهنمایی‌های اولیه را در قالب Popup به کاربر نمایش دهیم. Popup‌ها می‌توانند همچون Content Page‌ها، دارای View Model باشند و مواردی چون OnNavigatedTo، ارسال پارامتر و هر آنچه که گفته شد، در مورد آنها نیز صدق می‌کند.

5- برای Master/Detail کافی است بجای Nav/HelloWorld/ از MasterDetail/Nav/HelloWorld/ استفاده کنید. این عمل باعث می‌شود HelloWorld در داخل Navigation Page و Navigation Page داخل Master Detail باز شود. از این ساده‌تر امکان ندارد!

برای تغییر UI مربوط به Master که از سمت چپ باز می‌شود، فایل XamAppMasterDetailView.xaml را تغییر دهید.

در قسمت بعدی به جزئیات Binding خواهیم پرداخت.

۰۰۰۰۰۰۰۰۰۰
۱۱۱۱۱۱۱۱۱۱
۲۲۲۲۲۲۲۲۲۲
۳۳۳۳۳۳۳۳۳۳
۴۴۴۴۴۴۴۴۴۴
۵۵۵۵۵۵۵۵۵۵
۶۶۶۶۶۶۶۶۶۶
۷۷۷۷۷۷۷۷۷۷
۸۸۸۸۸۸۸۸۸۸
۹۹۹۹۹۹۹۹۹۹

public static class Helpers
    {
        /// <summary>
        /// تعیین معتبر بودن کد ملی
        /// </summary>
        /// <param name="nationalCode">کد ملی وارد شده</param>
        /// <returns>
        /// در صورتی که کد ملی صحیح باشد خروجی <c>true</c> و در صورتی که کد ملی اشتباه باشد خروجی <c>false</c> خواهد بود
        /// </returns>
        /// <exception cref="System.Exception"></exception>
        public static Boolean IsValidNationalCode(this String nationalCode)
        {
           //در صورتی که کد ملی وارد شده تهی باشد

            if (String.IsNullOrEmpty(nationalCode))
                throw new Exception("لطفا کد ملی را صحیح وارد نمایید");


            //در صورتی که کد ملی وارد شده طولش کمتر از 10 رقم باشد
            if (nationalCode.Length != 10)
                throw new Exception("طول کد ملی باید ده کاراکتر باشد");

            //در صورتی که کد ملی ده رقم عددی نباشد
            var regex = new Regex(@"\d{10}");
            if (!regex.IsMatch(nationalCode))
                throw new Exception("کد ملی تشکیل شده از ده رقم عددی می‌باشد؛ لطفا کد ملی را صحیح وارد نمایید");

            //در صورتی که رقم‌های کد ملی وارد شده یکسان باشد
            var allDigitEqual = new[]{"0000000000","1111111111","2222222222","3333333333","4444444444","5555555555","6666666666","7777777777","8888888888","9999999999"};
            if (allDigitEqual.Contains(nationalCode)) return false;


            //عملیات شرح داده شده در بالا
            var chArray = nationalCode.ToCharArray();
            var num0 = Convert.ToInt32(chArray[0].ToString())*10;
            var num2 = Convert.ToInt32(chArray[1].ToString())*9;
            var num3 = Convert.ToInt32(chArray[2].ToString())*8;
            var num4 = Convert.ToInt32(chArray[3].ToString())*7;
            var num5 = Convert.ToInt32(chArray[4].ToString())*6;
            var num6 = Convert.ToInt32(chArray[5].ToString())*5;
            var num7 = Convert.ToInt32(chArray[6].ToString())*4;
            var num8 = Convert.ToInt32(chArray[7].ToString())*3;
            var num9 = Convert.ToInt32(chArray[8].ToString())*2;
            var a = Convert.ToInt32(chArray[9].ToString());

            var b = (((((((num0 + num2) + num3) + num4) + num5) + num6) + num7) + num8) + num9;
            var c = b%11;

            return (((c < 2) && (a == c)) || ((c >= 2) && ((11 - c) == a)));
        }
    }

if(TextBoxNationalCode.Text.IsValidNationalCode ())
     //some code

//OR

if(Helpers.IsValidNationalCode (TextBoxNationalCode.Text))
     //some code

<Project Sdk="Microsoft.NET.Sdk.Razor">
  <PropertyGroup>
    <AddRazorSupportForMvc>true</AddRazorSupportForMvc>
  </PropertyGroup>

  <ItemGroup>
    <FrameworkReference Include="Microsoft.AspNetCore.App" />
  </ItemGroup>
</Project>

@using BlazorClassLibrary
@using BlazorClassLibrary.Shared

@namespace BlazorClassLibrary.Pages

<link rel="stylesheet" href="_content/BlazorClassLibrary/css/bootstrap/bootstrap.min.css" />
<link href="_content/BlazorClassLibrary/css/site.css" rel="stylesheet" />

<Project Sdk="Microsoft.NET.Sdk.Web">
  <ItemGroup>
    <ProjectReference Include="..\BlazorClassLibrary\BlazorClassLibrary.csproj" />
  </ItemGroup>
</Project>

<Project Sdk="Microsoft.NET.Sdk">
  <ItemGroup>
    <ProjectReference Include="..\BlazorClassLibrary\BlazorClassLibrary.csproj" />
  </ItemGroup>
</Project>

<Project Sdk="Microsoft.NET.Sdk">
  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Components.WebView.WindowsForms" Version="6.0.101-preview.11.2349" />
  </ItemGroup>
</Project>

namespace WinFormsApp;

partial class Form1
{
    private void InitializeComponent()
    {
      this.blazorWebView1 = new Microsoft.AspNetCore.Components.WebView.WindowsForms.BlazorWebView();

      this.SuspendLayout();

      this.blazorWebView1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
            | System.Windows.Forms.AnchorStyles.Left) 
            | System.Windows.Forms.AnchorStyles.Right)));
      this.blazorWebView1.Location = new System.Drawing.Point(13, 181);
      this.blazorWebView1.Name = "blazorWebView1";
      this.blazorWebView1.Size = new System.Drawing.Size(775, 257);
      this.blazorWebView1.TabIndex = 20;
      this.Controls.Add(this.blazorWebView1);

      this.components = new System.ComponentModel.Container();
      this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
      this.ClientSize = new System.Drawing.Size(800, 450);
      this.Text = "Form1";

      this.ResumeLayout(false);
    }

     private Microsoft.AspNetCore.Components.WebView.WindowsForms.BlazorWebView blazorWebView1;
}

<Project Sdk="Microsoft.NET.Sdk.Razor">

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Components.WebView.WindowsForms" Version="6.0.101-preview.11.2349" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\BlazorClassLibrary\BlazorClassLibrary.csproj" />
  </ItemGroup>
  
  <ItemGroup>
    <Content Update="wwwroot\**">
      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
    </Content>
  </ItemGroup>
  
</Project>

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
    <title>Blazor WinForms app</title>
    <base href="/" />
    <link rel="stylesheet" href="css/bootstrap/bootstrap.min.css" />
    <link href="css/site.css" rel="stylesheet" />
    <link href="css/app.css" rel="stylesheet" />
    <link href="WinFormsApp.styles.css" rel="stylesheet" />
</head>

<body>
    <div id="app"></div>

    <div id="blazor-error-ui">
        An unhandled error has occurred.
        <a href="">Reload</a>
        <a>🗙</a>
    </div>

    <script src="_framework/blazor.webview.js"></script>
</body>

</html>

using System;
using System.Windows.Forms;
using Microsoft.AspNetCore.Components.Web;
using Microsoft.AspNetCore.Components.WebView.WindowsForms;
using Microsoft.Extensions.DependencyInjection;
using BlazorServerApp.Data;
using BlazorClassLibrary;

namespace WinFormsApp;

public partial class Form1 : Form
{
private readonly AppState _appState = new();

    public Form1()
    {
        var serviceCollection = new ServiceCollection();
        serviceCollection.AddBlazorWebView();
        serviceCollection.AddSingleton<AppState>(_appState);
        serviceCollection.AddSingleton<WeatherForecastService>();

        InitializeComponent();

        blazorWebView1.HostPage = @"wwwroot\index.html";
        blazorWebView1.Services = serviceCollection.BuildServiceProvider();
        blazorWebView1.RootComponents.Add<App>("#app");

        //blazorWebView1.Dock = DockStyle.Fill;
    }
}

System.IO.FileNotFoundException: The system cannot find the file specified. (0x80070002)

serviceCollection.AddSingleton<AppState>(_appState);

 namespace BlazorServerApp.Data;

public class AppState
{
   public int Counter { get; set; }
}

builder.Services.AddSingleton<AppState>();

@inject BlazorServerApp.Data.AppState AppState

// ...


@code {

    private void IncrementCount()
    {
       // ...
       AppState.Counter++;
    }
}

private void button1_Click(object sender, EventArgs e)
{
   MessageBox.Show(
     owner: this,
     text: $"Current counter value is: {_appState.Counter}",
     caption: "Counter");
}

using System;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace BlazorServer.Entities
{
    public class RoomOrderDetail
    {
        public int Id { get; set; }

        [Required]
        public string UserId { get; set; }

        [Required]
        public string StripeSessionId { get; set; }

        public DateTime CheckInDate { get; set; }

        public DateTime CheckOutDate { get; set; }

        public DateTime ActualCheckInDate { get; set; }

        public DateTime ActualCheckOutDate { get; set; }

        public long TotalCost { get; set; }

        public int RoomId { get; set; }

        public bool IsPaymentSuccessful { get; set; }

        [Required]
        public string Name { get; set; }

        [Required]
        public string Email { get; set; }

        public string Phone { get; set; }

        [ForeignKey("RoomId")]
        public HotelRoom HotelRoom { get; set; }

        public string Status { get; set; }
    }
}

namespace BlazorServer.Common
{
    public static class BookingStatus
    {
        public const string Pending = "Pending";
        public const string Booked = "Booked";
        public const string CheckedIn = "CheckedIn";
        public const string CheckedOutCompleted = "CheckedOut";
        public const string NoShow = "NoShow";
        public const string Cancelled = "Cancelled";
    }
}

namespace BlazorServer.DataAccess
{
    public class ApplicationDbContext : IdentityDbContext<ApplicationUser>
    {
        public DbSet<RoomOrderDetail> RoomOrderDetails { get; set; }

        // ...
    }
}

dotnet tool update --global dotnet-ef --version 5.0.4
dotnet build
dotnet ef migrations --startup-project ../../BlazorWasm/BlazorWasm.WebApi/ add AddRoomOrderDetails --context ApplicationDbContext
dotnet ef --startup-project ../../BlazorWasm/BlazorWasm.WebApi/ database update --context ApplicationDbContext

using System;
using System.ComponentModel.DataAnnotations;

namespace BlazorServer.Models
{
    public class RoomOrderDetailsDTO
    {
        public int Id { get; set; }

        [Required]
        public string UserId { get; set; }

        [Required]
        public string StripeSessionId { get; set; }

        [Required]
        public DateTime CheckInDate { get; set; }

        [Required]
        public DateTime CheckOutDate { get; set; }

        public DateTime ActualCheckInDate { get; set; }

        public DateTime ActualCheckOutDate { get; set; }

        [Required]
        public long TotalCost { get; set; }

        [Required]
        public int RoomId { get; set; }

        public bool IsPaymentSuccessful { get; set; }

        [Required]
        public string Name { get; set; }

        [Required]
        public string Email { get; set; }

        public string Phone { get; set; }

        public HotelRoomDTO HotelRoomDTO { get; set; }

        public string Status { get; set; }
    }
}

namespace BlazorServer.Models.Mappings
{
    public class MappingProfile : Profile
    {
        public MappingProfile()
        {
            // ... 
            CreateMap<RoomOrderDetail, RoomOrderDetailsDTO>().ReverseMap(); // two-way mapping
        }
    }
}

namespace BlazorServer.Services
{
    public interface IRoomOrderDetailsService
    {
        Task<RoomOrderDetailsDTO> CreateAsync(RoomOrderDetailsDTO details);

        Task<List<RoomOrderDetailsDTO>> GetAllRoomOrderDetailsAsync();

        Task<RoomOrderDetailsDTO> GetRoomOrderDetailAsync(int roomOrderId);

        Task<bool> IsRoomBookedAsync(int RoomId, DateTime checkInDate, DateTime checkOutDate);

        Task<RoomOrderDetailsDTO> MarkPaymentSuccessfulAsync(int id);

        Task<bool> UpdateOrderStatusAsync(int RoomOrderId, string status);
    }
}

namespace BlazorServer.Services
{
    public class RoomOrderDetailsService : IRoomOrderDetailsService
    {
        private readonly ApplicationDbContext _dbContext;
        private readonly IMapper _mapper;
        private readonly IConfigurationProvider _mapperConfiguration;

        public RoomOrderDetailsService(ApplicationDbContext dbContext, IMapper mapper)
        {
            _dbContext = dbContext ?? throw new ArgumentNullException(nameof(dbContext));
            _mapper = mapper ?? throw new ArgumentNullException(nameof(mapper));
            _mapperConfiguration = mapper.ConfigurationProvider;
        }

        public async Task<RoomOrderDetailsDTO> CreateAsync(RoomOrderDetailsDTO details)
        {
            var roomOrder = _mapper.Map<RoomOrderDetail>(details);
            roomOrder.Status = BookingStatus.Pending;
            var result = await _dbContext.RoomOrderDetails.AddAsync(roomOrder);
            await _dbContext.SaveChangesAsync();
            return _mapper.Map<RoomOrderDetailsDTO>(result.Entity);
        }

        public Task<List<RoomOrderDetailsDTO>> GetAllRoomOrderDetailsAsync()
        {
            return _dbContext.RoomOrderDetails
                            .Include(roomOrderDetail => roomOrderDetail.HotelRoom)
                            .ProjectTo<RoomOrderDetailsDTO>(_mapperConfiguration)
                            .ToListAsync();
        }

        public async Task<RoomOrderDetailsDTO> GetRoomOrderDetailAsync(int roomOrderId)
        {
            var roomOrderDetailsDTO = await _dbContext.RoomOrderDetails
                                            .Include(u => u.HotelRoom)
                                                .ThenInclude(x => x.HotelRoomImages)
                                            .ProjectTo<RoomOrderDetailsDTO>(_mapperConfiguration)
                                            .FirstOrDefaultAsync(u => u.Id == roomOrderId);

            roomOrderDetailsDTO.HotelRoomDTO.TotalDays =
                roomOrderDetailsDTO.CheckOutDate.Subtract(roomOrderDetailsDTO.CheckInDate).Days;
            return roomOrderDetailsDTO;
        }

        public Task<bool> IsRoomBookedAsync(int RoomId, DateTime checkInDate, DateTime checkOutDate)
        {
            return _dbContext.RoomOrderDetails
                .AnyAsync(
                    roomOrderDetail =>
                        roomOrderDetail.RoomId == RoomId &&
                        roomOrderDetail.IsPaymentSuccessful &&
                        (
                            (checkInDate < roomOrderDetail.CheckOutDate && checkInDate > roomOrderDetail.CheckInDate) ||
                            (checkOutDate > roomOrderDetail.CheckInDate && checkInDate < roomOrderDetail.CheckInDate)
                        )
                );
        }

        public Task<RoomOrderDetailsDTO> MarkPaymentSuccessfulAsync(int id)
        {
            throw new NotImplementedException();
        }

        public Task<bool> UpdateOrderStatusAsync(int RoomOrderId, string status)
        {
            throw new NotImplementedException();
        }
    }
}

namespace BlazorWasm.WebApi
{
    public class Startup
    {
        // ...

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddScoped<IRoomOrderDetailsService, RoomOrderDetailsService>();
            // ...

namespace BlazorWasm.Client.Services
{
    public interface IClientRoomOrderDetailsService
    {
        Task<RoomOrderDetailsDTO> MarkPaymentSuccessfulAsync(RoomOrderDetailsDTO details);
        Task<RoomOrderDetailsDTO> SaveRoomOrderDetailsAsync(RoomOrderDetailsDTO details);
    }
}

namespace BlazorWasm.Client.Services
{
    public class ClientRoomOrderDetailsService : IClientRoomOrderDetailsService
    {
        private readonly HttpClient _httpClient;

        public ClientRoomOrderDetailsService(HttpClient httpClient)
        {
            _httpClient = httpClient ?? throw new ArgumentNullException(nameof(httpClient));
        }

        public Task<RoomOrderDetailsDTO> MarkPaymentSuccessfulAsync(RoomOrderDetailsDTO details)
        {
            throw new NotImplementedException();
        }

        public Task<RoomOrderDetailsDTO> SaveRoomOrderDetailsAsync(RoomOrderDetailsDTO details)
        {
            throw new NotImplementedException();
        }
    }
}

namespace BlazorWasm.Client
{
    public class Program
    {
        public static async Task Main(string[] args)
        {
            var builder = WebAssemblyHostBuilder.CreateDefault(args);
            // ...
            builder.Services.AddScoped<IClientRoomOrderDetailsService, ClientRoomOrderDetailsService>();
            // ...
        }
    }
}

using BlazorServer.Models;

namespace BlazorWasm.Client.Models.ViewModels
{
    public class HotelRoomBookingVM
    {
        public RoomOrderDetailsDTO OrderDetails { get; set; }
    }
}

@page "/hotel/room-details/{Id:int}"

@inject IJSRuntime JsRuntime
@inject ILocalStorageService LocalStorage
@inject IClientHotelRoomService HotelRoomService

@if (HotelBooking?.OrderDetails?.HotelRoomDTO?.HotelRoomImages == null)
{
    <div class="spinner"></div>
}
else
{

}

@code {
    [Parameter]
    public int? Id { get; set; }

    HotelRoomBookingVM HotelBooking  = new HotelRoomBookingVM();
    int NoOfNights = 1;

    protected override async Task OnInitializedAsync()
    {
        try
        {
            HotelBooking.OrderDetails = new RoomOrderDetailsDTO();
            if (Id != null)
            {
                if (await LocalStorage.GetItemAsync<HomeVM>(ConstantKeys.LocalInitialBooking) != null)
                {
                    var roomInitialInfo = await LocalStorage.GetItemAsync<HomeVM>(ConstantKeys.LocalInitialBooking);
                    HotelBooking.OrderDetails.HotelRoomDTO = await HotelRoomService.GetHotelRoomDetailsAsync(
                        Id.Value, roomInitialInfo.StartDate, roomInitialInfo.EndDate);
                    NoOfNights = roomInitialInfo.NoOfNights;
                    HotelBooking.OrderDetails.CheckInDate = roomInitialInfo.StartDate;
                    HotelBooking.OrderDetails.CheckOutDate = roomInitialInfo.EndDate;
                    HotelBooking.OrderDetails.HotelRoomDTO.TotalDays = roomInitialInfo.NoOfNights;
                    HotelBooking.OrderDetails.HotelRoomDTO.TotalAmount =
                        roomInitialInfo.NoOfNights * HotelBooking.OrderDetails.HotelRoomDTO.RegularRate;
                }
                else
                {
                    HotelBooking.OrderDetails.HotelRoomDTO = await HotelRoomService.GetHotelRoomDetailsAsync(
                        Id.Value, DateTime.Now, DateTime.Now.AddDays(1));
                    NoOfNights = 1;
                    HotelBooking.OrderDetails.CheckInDate = DateTime.Now;
                    HotelBooking.OrderDetails.CheckOutDate = DateTime.Now.AddDays(1);
                    HotelBooking.OrderDetails.HotelRoomDTO.TotalDays = 1;
                    HotelBooking.OrderDetails.HotelRoomDTO.TotalAmount =
                        HotelBooking.OrderDetails.HotelRoomDTO.RegularRate;
                }
            }
        }
        catch (Exception e)
        {
            await JsRuntime.ToastrError(e.Message);
        }
    }
}

namespace BlazorWasm.Client.Services
{
    public class ClientHotelRoomService : IClientHotelRoomService
    {
        private readonly HttpClient _httpClient;

        public ClientHotelRoomService(HttpClient httpClient)
        {
            _httpClient = httpClient ?? throw new ArgumentNullException(nameof(httpClient));
        }

        public Task<HotelRoomDTO> GetHotelRoomDetailsAsync(int roomId, DateTime checkInDate, DateTime checkOutDate)
        {
            // How to url-encode query-string parameters properly
            var uri = new UriBuilderExt(new Uri(_httpClient.BaseAddress, $"/api/hotelroom/{roomId}"))
                            .AddParameter("checkInDate", $"{checkInDate:yyyy'-'MM'-'dd}")
                            .AddParameter("checkOutDate", $"{checkOutDate:yyyy'-'MM'-'dd}")
                            .Uri;
            return _httpClient.GetFromJsonAsync<HotelRoomDTO>(uri);
        }

        public Task<IEnumerable<HotelRoomDTO>> GetHotelRoomsAsync(DateTime checkInDate, DateTime checkOutDate)
        {
           // ...
        }
    }
}

@if (HotelBooking?.OrderDetails?.HotelRoomDTO?.HotelRoomImages == null)
{
    <div class="spinner"></div>
}
else
{
    <div class="mt-4 mx-4 px-0 px-md-5 mx-md-5">
        <div class="row p-2 my-3 " style="border-radius:20px; ">
            <div class="col-12 col-lg-7 p-4" style="border: 1px solid gray">
                <div class="row px-2 text-success border-bottom">
                    <div class="col-8 py-1"><p style="font-size:x-large;margin:0px;">Selected Room</p></div>
                    <div class="col-4 p-0"><a href="hotel/rooms" class="btn btn-secondary btn-block">Back to Room's</a></div>
                </div>
                <div class="row">
                    <div class="col-6">
                        <div id="" class="carousel slide mb-4 m-md-3 m-0 pt-3 pt-md-0" data-ride="carousel">
                            <div id="carouselExampleIndicators" class="carousel slide" data-ride="carousel">
                                <ol class="carousel-indicators">
                                    <li data-target="#carouselExampleIndicators" data-slide-to="0" class="active"></li>
                                    <li data-target="#carouselExampleIndicators" data-slide-to="1"></li>
                                </ol>
                                <div class="carousel-inner">
                                    <div class="carousel-item active">
                                        <img class="d-block w-100" src="images/slide1.jpg" alt="First slide">
                                    </div>
                                </div>
                                <a class="carousel-control-prev" href="#carouselExampleIndicators" role="button" data-slide="prev">
                                    <span class="carousel-control-prev-icon" aria-hidden="true"></span>
                                    <span class="sr-only">Previous</span>
                                </a>
                                <a class="carousel-control-next" href="#carouselExampleIndicators" role="button" data-slide="next">
                                    <span class="carousel-control-next-icon" aria-hidden="true"></span>
                                    <span class="sr-only">Next</span>
                                </a>
                            </div>
                        </div>
                    </div>
                    <div class="col-6">
                        <span class="float-right pt-4">
                            <span class="float-right">Occupancy : @HotelBooking.OrderDetails.HotelRoomDTO.Occupancy adults </span><br />
                            <span class="float-right pt-1">Size : @HotelBooking.OrderDetails.HotelRoomDTO.SqFt sqft</span><br />
                            <h4 class="text-warning font-weight-bold pt-5">
                                <span style="border-bottom:1px solid #ff6a00">
                                    @HotelBooking.OrderDetails.HotelRoomDTO.TotalAmount.ToString("#,#.00#;(#,#.00#)")
                                </span>
                            </h4>
                            <span class="float-right">Cost for @HotelBooking.OrderDetails.HotelRoomDTO.TotalDays nights</span>
                        </span>
                    </div>
                </div>
                <div class="row p-2">
                    <div class="col-12">
                        <p class="card-title text-warning" style="font-size:xx-large">@HotelBooking.OrderDetails.HotelRoomDTO.Name</p>
                        <p class="card-text" style="font-size:large">
                            @((MarkupString)@HotelBooking.OrderDetails.HotelRoomDTO.Details)
                        </p>
                    </div>

                </div>
            </div>
}

@if (HotelBooking?.OrderDetails?.HotelRoomDTO?.HotelRoomImages == null)
{
    <div class="spinner"></div>
}
else
{
  // ...
             
            <div class="col-12 col-lg-5 p-4 2 mt-4 mt-md-0" style="border: 1px solid gray;">
                <EditForm Model="HotelBooking" class="container" OnValidSubmit="HandleCheckout">
                    <div class="row px-2 text-success border-bottom"><div class="col-7 py-1"><p style="font-size:x-large;margin:0px;">Enter Details</p></div></div>

                    <div class="form-group pt-2">
                        <label class="text-warning">Name</label>
                        <InputText @bind-Value="HotelBooking.OrderDetails.Name" type="text" class="form-control" />
                    </div>
                    <div class="form-group pt-2">
                        <label class="text-warning">Phone</label>
                        <InputText @bind-Value="HotelBooking.OrderDetails.Phone" type="text" class="form-control" />
                    </div>
                    <div class="form-group">
                        <label class="text-warning">Email</label>
                        <InputText @bind-Value="HotelBooking.OrderDetails.Email" type="text" class="form-control" />
                    </div>
                    <div class="form-group">
                        <label class="text-warning">Check in Date</label>
                        <InputDate @bind-Value="HotelBooking.OrderDetails.CheckInDate" type="date" disabled class="form-control" />
                    </div>
                    <div class="form-group">
                        <label class="text-warning">Check Out Date</label>
                        <InputDate @bind-Value="HotelBooking.OrderDetails.CheckOutDate" type="date" disabled class="form-control" />
                    </div>
                    <div class="form-group">
                        <label class="text-warning">No. of nights</label>
                        <select class="form-control" value="@NoOfNights" @onchange="HandleNoOfNightsChange">
                            @for (var i = 1; i <= 10; i++)
                            {
                                if (i == NoOfNights)
                                {
                                    <option value="@i" selected="selected">@i</option>
                                }
                                else
                                {
                                    <option value="@i">@i</option>
                                }
                            }
                        </select>
                    </div>
                    <div class="form-group">
                        <button type="submit" class="btn btn-success form-control">Checkout Now</button>
                    </div>
                </EditForm>
            </div>
        </div>
    </div>
}

@code {
    // ...

    private async Task HandleNoOfNightsChange(ChangeEventArgs e)
    {
        NoOfNights = Convert.ToInt32(e.Value.ToString());
        HotelBooking.OrderDetails.HotelRoomDTO = await HotelRoomService.GetHotelRoomDetailsAsync(
            Id.Value,
            HotelBooking.OrderDetails.CheckInDate,
            HotelBooking.OrderDetails.CheckInDate.AddDays(NoOfNights));

        HotelBooking.OrderDetails.CheckOutDate = HotelBooking.OrderDetails.CheckInDate.AddDays(NoOfNights);
        HotelBooking.OrderDetails.HotelRoomDTO.TotalDays = NoOfNights;
        HotelBooking.OrderDetails.HotelRoomDTO.TotalAmount =
                NoOfNights * HotelBooking.OrderDetails.HotelRoomDTO.RegularRate;
    }

    private async Task HandleCheckout()
    {
        if (!await HandleValidation())
        {
            return;
        }
    }

    private async Task<bool> HandleValidation()
    {
        if (string.IsNullOrEmpty(HotelBooking.OrderDetails.Name))
        {
            await JsRuntime.ToastrError("Name cannot be empty");
            return false;
        }

        if (string.IsNullOrEmpty(HotelBooking.OrderDetails.Phone))
        {
            await JsRuntime.ToastrError("Phone cannot be empty");
            return false;
        }

        if (string.IsNullOrEmpty(HotelBooking.OrderDetails.Email))
        {
            await JsRuntime.ToastrError("Email cannot be empty");
            return false;
        }
        return true;
    }
}

 $.ajax({
            type: "POST",
            url: options.renderModalPartialViewUrl,
            data: options.renderModalPartialViewData,