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brew install --cask powershell

❯ pwsh
PowerShell 7.2.6
Copyright (c) Microsoft Corporation.

https://aka.ms/powershell
Type 'help' to get help.

PS />

Variable1 += Products.UnitPrice

A .NET GIS solution that is fast and reliable for the .NET platform.
NetTopologySuite is a direct-port of all the functionalities offered by JTS Topology Suite: NTS expose JTS in a '.NET way', as example using Properties, Indexers etc...

> dotnet new react

spa.UseReactDevelopmentServer(npmScript: "start");

spa.UseProxyToSpaDevelopmentServer("http://localhost:3000");

> create-react-app clientapp

> cd clientapp
> npm install --save bootstrap axios

 import "bootstrap/dist/css/bootstrap.css";

using Microsoft.AspNetCore.Mvc;

namespace DownloadFilesSample.Controllers
{
    [Route("api/[controller]")]
    public class ReportsController : Controller
    {
        [HttpGet("[action]")]
        public IActionResult GetPdfReport()
        {
            return File(virtualPath: "~/app_data/sample.pdf",
                        contentType: "application/pdf",
                        fileDownloadName: "sample.pdf");
        }
    }
}

  const getResults = async () => {
      const { headers, data } = await axios.get(apiUrl, {
        responseType: "blob"
      });
  }

import axios from "axios";
import React, { useEffect, useState } from "react";

export default function DisplayPdf() {
  const apiUrl = "https://localhost:5001/api/Reports/GetPdfReport";

  const [blobInfo, setBlobInfo] = useState({
    blobUrl: "",
    fileName: ""
  });

  useEffect(() => {
    getResults();
  }, []);

  const getResults = async () => {
    try {
      const { headers, data } = await axios.get(apiUrl, {
        responseType: "blob"
      });
      console.log("headers", headers);

      const pdfBlobUrl = window.URL.createObjectURL(data);
      console.log("pdfBlobUrl", pdfBlobUrl);

      const fileName = headers["content-disposition"]
        .split(";")
        .find(n => n.includes("filename="))
        .replace("filename=", "")
        .trim();
      console.log("filename", fileName);

      setBlobInfo({
        blobUrl: pdfBlobUrl,
        fileName: fileName
      });
    } catch (error) {
      console.log(error);
    }
  };

ontent-disposition: "attachment; filename=sample.pdf; filename*=UTF-8''sample.pdf"

import axios from "axios";
import React, { useEffect, useState } from "react";

export default function DisplayPdf() {

  // ...

  const { blobUrl } = blobInfo;

  return (
    <>
      <h1>Display PDF Files</h1>
      <button className="btn btn-info" onClick={handlePrintPdf}>
        Print PDF
      </button>
      <button className="btn btn-primary ml-2" onClick={handleShowPdfInNewTab}>
        Show PDF in a new tab
      </button>
      <button className="btn btn-success ml-2" onClick={handleDownloadPdf}>
        Download PDF
      </button>

      <section className="card mb-5 mt-3">
        <div className="card-header">
          <h4>using iframe</h4>
        </div>
        <div className="card-body">
          <iframe
            title="PDF Report"
            width="100%"
            height="600"
            src={blobUrl}
            type="application/pdf"
          ></iframe>
        </div>
      </section>

      <section className="card mb-5">
        <div className="card-header">
          <h4>using object</h4>
        </div>
        <div className="card-body">
          <object
            data={blobUrl}
            aria-label="PDF Report"
            type="application/pdf"
            width="100%"
            height="100%"
          ></object>
        </div>
      </section>

      <section className="card mb-5">
        <div className="card-header">
          <h4>using embed</h4>
        </div>
        <div className="card-body">
          <embed
            aria-label="PDF Report"
            src={blobUrl}
            type="application/pdf"
            width="100%"
            height="100%"
          ></embed>
        </div>
      </section>
    </>
  );
}

  const handlePrintPdf = () => {
    const { blobUrl } = blobInfo;
    if (!blobUrl) {
      throw new Error("pdfBlobUrl is null");
    }

    const iframe = document.createElement("iframe");
    iframe.style.display = "none";
    iframe.src = blobUrl;
    document.body.appendChild(iframe);
    if (iframe.contentWindow) {
      iframe.contentWindow.print();
    }
  };

const handleShowPdfInNewTab = () => {
    const { blobUrl } = blobInfo;
    if (!blobUrl) {
      throw new Error("pdfBlobUrl is null");
    }

    window.open(blobUrl);
  };

  const handleDownloadPdf = () => {
    const { blobUrl, fileName } = blobInfo;
    if (!blobUrl) {
      throw new Error("pdfBlobUrl is null");
    }

    const anchor = document.createElement("a");
    anchor.style.display = "none";
    anchor.href = blobUrl;
    anchor.download = fileName;
    document.body.appendChild(anchor);
    anchor.click();
  };

<canvas id="canvas1" width="800" height="800" ></canvas>

<link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" >
<!--[if ie]><script type="text/javascript" src="excanvas.js"></script><![endif]-->
<script type="text/javascript" src="orgchart.js"></script>

var o = new orgChart();

o.addNode(1, '', '', 'Root node');
o.addNode(2, 1, 'u', 'u-node 1');
o.addNode(3, 1, 'u', 'u-node 2');
o.addNode(4, 1, 'u', 'u-node 3');
o.addNode(5, 1, 'l', 'l-node 1');
o.addNode(6, 1, 'l', 'l-node 2');
o.addNode(7, 1, 'r', 'r-node 1');
o.addNode(8, 1, 'r', 'r-node 2');
o.addNode(9, 1, 'r', 'r-node 3');

o.addNode('', '', '', 'Root 2');
o.addNode('', 'Root 2', 'r', 'using');
o.addNode('', 'Root 2', 'r', 'text as\nid');

o.drawChart('canvas1');

dotnet tool update -g Microsoft.Web.LibraryManager.Cli
libman init
libman install bootstrap --provider unpkg --destination wwwroot/lib/bootstrap
libman install open-iconic --provider unpkg --destination wwwroot/lib/open-iconic

@import url('open-iconic/font/css/open-iconic-bootstrap.min.css');

<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>BlazorServer.App</title>
    <base href="~/" />
    <link href="lib/open-iconic/font/css/open-iconic-bootstrap.min.css" rel="stylesheet" />
    <link href="lib/bootstrap/dist/css/bootstrap.min.css" rel="stylesheet" />
    <link href="css/site.css" rel="stylesheet" />
    <link href="BlazorServer.App.styles.css" rel="stylesheet" />
</head>

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>
  </PropertyGroup>
</Project>

using System;
using System.ComponentModel.DataAnnotations;

namespace BlazorServer.Entities
{
    public class HotelRoom
    {
        [Key]
        public int Id { get; set; }

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

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

        [Required]
        public decimal RegularRate { get; set; }

        public string Details { get; set; }

        public string SqFt { get; set; }

        public string CreatedBy { get; set; }

        public DateTime CreatedDate { get; set; } = DateTime.Now;

        public string UpdatedBy { get; set; }

        public DateTime UpdatedDate { get; set; }
    }
}

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <ProjectReference Include="..\BlazorServer.Entities\BlazorServer.Entities.csproj" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="5.0.3" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="5.0.3">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
  </ItemGroup>
</Project>

using BlazorServer.Entities;
using Microsoft.EntityFrameworkCore;

namespace BlazorServer.DataAccess
{
    public class ApplicationDbContext : DbContext
    {
        public DbSet<HotelRoom> HotelRooms { get; set; }

        public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options) : base(options)
        { }
    }
}

<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <ProjectReference Include="..\BlazorServer.DataAccess\BlazorServer.DataAccess.csproj" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="5.0.3" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="5.0.3">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
  </ItemGroup>
</Project>

namespace BlazorServer.App
{
    public class Startup
    {
        // ...
 
        public void ConfigureServices(IServiceCollection services)
        {
            var connectionString = Configuration.GetConnectionString("DefaultConnection");
            services.AddDbContext<ApplicationDbContext>(options => options.UseSqlServer(connectionString));

            // ...

{
  "ConnectionStrings": {
    "DefaultConnection": "Server=(localdb)\\mssqllocaldb;Database=HotelManagement;Trusted_Connection=True;MultipleActiveResultSets=true"
  }
}

dotnet tool update --global dotnet-ef --version 5.0.3
dotnet build
dotnet ef migrations --startup-project ../BlazorServer.App/ add Init --context ApplicationDbContext
dotnet ef --startup-project ../BlazorServer.App/ database update --context ApplicationDbContext

using System;
using System.ComponentModel.DataAnnotations;

namespace BlazorServer.Models
{
    public record HotelRoomDTO
    {
        public int Id { get; init; }

        [Required(ErrorMessage = "Please enter the room's name")]
        public string Name { get; init; }

        [Required(ErrorMessage = "Please enter the occupancy")]
        public int Occupancy { get; init; }

        [Range(1, 3000, ErrorMessage = "Regular rate must be between 1 and 3000")]
        public decimal RegularRate { get; init; }

        public string Details { get; init; }

        public string SqFt { get; init; }
    }
}

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <ProjectReference Include="..\BlazorServer.Entities\BlazorServer.Entities.csproj" />
    <ProjectReference Include="..\BlazorServer.Models\BlazorServer.Models.csproj" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="AutoMapper.Extensions.Microsoft.DependencyInjection" Version="8.1.1" />
  </ItemGroup>
</Project>

using AutoMapper;
using BlazorServer.Entities;

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

namespace BlazorServer.App
{
    public class Startup
    {
        // ...

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddAutoMapper(AppDomain.CurrentDomain.GetAssemblies());

            // ...

using System.Collections.Generic;
using System.Threading.Tasks;
using BlazorServer.Models;

namespace BlazorServer.Services
{
    public interface IHotelRoomService
    {
        Task<HotelRoomDTO> CreateHotelRoomAsync(HotelRoomDTO hotelRoomDTO);

        Task<int> DeleteHotelRoomAsync(int roomId);

        IAsyncEnumerable<HotelRoomDTO> GetAllHotelRoomsAsync();

        Task<HotelRoomDTO> GetHotelRoomAsync(int roomId);

        Task<HotelRoomDTO> IsRoomUniqueAsync(string name);

        Task<HotelRoomDTO> UpdateHotelRoomAsync(int roomId, HotelRoomDTO hotelRoomDTO);
    }
}

using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using AutoMapper;
using AutoMapper.QueryableExtensions;
using BlazorServer.DataAccess;
using BlazorServer.Entities;
using BlazorServer.Models;
using Microsoft.EntityFrameworkCore;

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

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

        public async Task<HotelRoomDTO> CreateHotelRoomAsync(HotelRoomDTO hotelRoomDTO)
        {
            var hotelRoom = _mapper.Map<HotelRoom>(hotelRoomDTO);
            hotelRoom.CreatedDate = DateTime.Now;
            hotelRoom.CreatedBy = "";
            var addedHotelRoom = await _dbContext.HotelRooms.AddAsync(hotelRoom);
            await _dbContext.SaveChangesAsync();
            return _mapper.Map<HotelRoomDTO>(addedHotelRoom.Entity);
        }

        public async Task<int> DeleteHotelRoomAsync(int roomId)
        {
            var roomDetails = await _dbContext.HotelRooms.FindAsync(roomId);
            if (roomDetails == null)
            {
                return 0;
            }

            _dbContext.HotelRooms.Remove(roomDetails);
            return await _dbContext.SaveChangesAsync();
        }

        public IAsyncEnumerable<HotelRoomDTO> GetAllHotelRoomsAsync()
        {
            return _dbContext.HotelRooms
                        .ProjectTo<HotelRoomDTO>(_mapperConfiguration)
                        .AsAsyncEnumerable();
        }

        public Task<HotelRoomDTO> GetHotelRoomAsync(int roomId)
        {
            return _dbContext.HotelRooms
                            .ProjectTo<HotelRoomDTO>(_mapperConfiguration)
                            .FirstOrDefaultAsync(x => x.Id == roomId);
        }

        public Task<HotelRoomDTO> IsRoomUniqueAsync(string name)
        {
            return _dbContext.HotelRooms
                            .ProjectTo<HotelRoomDTO>(_mapperConfiguration)
                            .FirstOrDefaultAsync(x => x.Name == name);
        }

        public async Task<HotelRoomDTO> UpdateHotelRoomAsync(int roomId, HotelRoomDTO hotelRoomDTO)
        {
            if (roomId != hotelRoomDTO.Id)
            {
                return null;
            }

            var roomDetails = await _dbContext.HotelRooms.FindAsync(roomId);
            var room = _mapper.Map(hotelRoomDTO, roomDetails);
            room.UpdatedBy = "";
            room.UpdatedDate = DateTime.Now;
            var updatedRoom = _dbContext.HotelRooms.Update(room);
            await _dbContext.SaveChangesAsync();
            return _mapper.Map<HotelRoomDTO>(updatedRoom.Entity);
        }
    }
}

namespace BlazorServer.App
{
    public class Startup
    {
        // ...

        public void ConfigureServices(IServiceCollection services)
        {
            services.AddScoped<IHotelRoomService, HotelRoomService>();

         // ...

<head>
    <style>
        img {
          width: 100%;
          height: 200px;
          max-height: 200px;
        }
      </style>
</head>

<body>
    <div class="container" id="services">
        <div class="row">
            <section class="col-sm-8">
                <img src="images/image.png" alt="sample image">
                <h4>Exotic Pets</h4>
                <p>We offer <strong>specialized</strong> care for <em>reptiles,
                        rodents, birds,</em> and other exotic pets.</p>
            </section>
            <section class="col-sm-4">
                <div class="row no-gutters">
                    <div class="col-2 col-sm-4">
                        <img src="images/image.png" class="img-thumbnail" alt="sample image">
                        <p>Image 1</p>
                    </div>
                    <div class="col-2 col-sm-4">
                        <img src="images/image.png" class="img-thumbnail" alt="sample image">
                        <p>Image 2</p>
                    </div>
                    <div class="col-2 col-sm-4">
                        <img src="images/image.png" class="img-thumbnail" alt="sample image">
                        <p>Image 3</p>
                    </div>
                    <div class="col-2 col-sm-4">
                        <img src="images/image.png" class="img-thumbnail" alt="sample image">
                        <p>Image 4</p>
                    </div>
                    <div class="col-2 col-sm-4">
                        <img src="images/image.png" class="img-thumbnail" alt="sample image">
                        <p>Image 5</p>
                    </div>
                    <div class="col-2 col-sm-4">
                        <img src="images/image.png" class="img-thumbnail" alt="sample image">
                        <p>Image 6</p>
                    </div>
                </div>
            </section>
        </div>
    </div>
</body>

<body>
    <div class="container" id="services">
        <div class="row">
            <section class="col-sm-8">
            </section>
            <section class="col-sm-4">
                <div class="row no-gutters">

                </div>
            </section>
        </div>
    </div>
</body>

<div class="col-2 col-sm-4">
      <img src="images/image.png" class="img-thumbnail" alt="sample image">
      <p>Image 1</p>
</div>

<head>
    <style>
        img {
          width: 100%;
          height: 200px;
          max-height: 200px;
        }
    </style>
</head>

<body>
    <div class="container" id="services">
        <h2>Flex Order</h2>
        <div class="row">
            <section class="col order-2 d-flex flex-column">
                <img src="images/image.png" class="order-2" alt="sample image">
                <h4>1. Exotic Pets</h4>
                <p>We offer <strong>specialized</strong> care for <em>reptiles,
                        rodents, birds,</em> and other exotic pets.</p>
            </section>
            <section class="col order-1">
                <img src="images/image.png" alt="sample image">
                <h4>2. Grooming</h4>
                <p>Our therapeutic <span class="font-weight-bold">grooming</span>
                    treatments help battle fleas, allergic dermatitis, and
                    other challenging skin conditions.</p>
            </section>
            <section class="col order-3">
                <img src="images/image.png" alt="sample image">
                <h4>3. General Health</h4>
                <p>Wellness and senior exams, ultrasound, x-ray, and dental
                    cleanings are just a few of our general health services.</p>
            </section>
        </div>
    </div>
</body>

<head>
    <style>
        img {
          width: 100%;
          height: 100px;
          max-height: 100px;
        }
    </style>
</head>

<body>
    <div class="container" id="services">

        <div class="row bg-info align-items-center" style="height: 100vh;">
            <div class="col">
                <div class="row">
                    <section class="col">
                        <img src="images/image.png" alt="sample image">
                        <h4>Exotic Pets</h4>
                        <p>We offer specialized care for reptiles, rodents,
                            birds, and
                            other exotic pets.</p>
                    </section>
                    <section class="col">
                        <img src="images/image.png" alt="sample image">
                        <h4>Grooming</h4>
                        <p>Our therapeutic grooming treatments help battle
                            fleas,
                            allergic dermatitis, and other challenging skin
                            conditions.</p>
                    </section>
                    <section class="col">
                        <img src="images/image.png" alt="sample image">
                        <h4>General Health</h4>
                        <p>Wellness and senior exams, ultrasound, x-ray, and
                            dental
                            cleanings.</p>
                    </section>
                </div>
            </div>
        </div>

        <div class="row bg-success" style="height: 100vh;">
            <section class="col">
                <img src="images/image.png" alt="sample image">
                <h4>Exotic Pets</h4>
                <p>We offer specialized care for reptiles, rodents,
                    birds, and
                    other exotic pets.</p>
            </section>
            <section class="col align-self-center">
                <img src="images/image.png" alt="sample image">
                <h4>Grooming</h4>
                <p>Our therapeutic grooming treatments help battle
                    fleas,
                    allergic dermatitis, and other challenging skin
                    conditions.</p>
            </section>
            <section class="col align-self-end">
                <img src="images/image.png" alt="sample image">
                <h4>General Health</h4>
                <p>Wellness and senior exams, ultrasound, x-ray, and
                    dental
                    cleanings.</p>
            </section>
        </div>

        <div class="row bg-warning justify-content-center" style="height: 100vh;">
            <section class="col-4">
                <img src="images/image.png" alt="sample image">
                <h4>Exotic Pets</h4>
                <p>We offer specialized care for reptiles, rodents, birds, and
                    other exotic pets.</p>
            </section>
            <section class="col-4">
                <img src="images/image.png" alt="sample image">
                <h4>Grooming</h4>
                <p>Our therapeutic grooming treatments help battle fleas,
                    allergic dermatitis, and other challenging skin conditions.</p>
            </section>
        </div>

    </div><!-- container -->
</body>

        <div class="row bg-info align-items-center" style="height: 100vh;">
            <div class="col">
                <div class="row">
                    <section class="col">

    <div class="container bg-success">
        <div class="bg-info fixed-bottom">
            <div class="item">Exotic Pets</div>
            <div class="item">Grooming</div>
            <div class="item">Health</div>
        </div>