Step By Step Guide to use WebAPI in ASP.NET CORE WebApplication

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If you have to completed your WebAPI then must to know , how to use it in web application.  Now , you can see , how to use WebAPI in WebApplication.

WEBAPI Project
Step-1 :   Create Model first
public class Student
    {
        public int Id { get; set; }
        public string Name { get; set; }
    }

Step-2 :  Create Data Context Class

public class Context : DbContext
    {
        public Context(DbContextOptions<Context> options) : base(options)
        {

        }
        public DbSet<Student> Students { get; set; }

    }

Step-3 :  Add Connection String into your Application Setting File

{
  "ConnectionStrings": {
    "DefaultConnection": "Server=(localdb)\\mssqllocaldb;Database=aspnet-WebApplication1-6550C064-027F-4939-822B-5B4620D08657;Trusted_Connection=True;MultipleActiveResultSets=true"
  },
  "Logging": {
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Warning"
    }
  }
}

Step-4 :  Add Connection String in Startup file

  services.AddDbContext<ApplicationDbContext>(options =>
                options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));


Step-5 Do Migration 
Step-6 :  Create Controller 

namespace WebApiTestApplication.Controllers
{
    [Route("api/[controller]")]
    public class StudentController : Controller
    {
        private Context _context;
        public StudentController(Context context)
        {
            _context = context;
        }
        [HttpGet]
        public List<Student> Get()
        {
            return _context.Students.ToList();
        }

        public IActionResult Index()
        {
            return View();
        }
    }}

Step- 7: Add new project Web Application in the same solution
Step-8 : Add Helper Class  also add View Model class

namespace WebApplication1.Helper
{
    public class StudentAPI
    {
        public HttpClient Initial()
        {
            var Client = new HttpClient();
            Client.BaseAddress = new Uri("http://localhost:56562/");
            return Client;
        }
    }

}

If you Know what is "56562" then must to watch the video

And the model class

namespace WebApiTestApplication.Models
{
    public class Student
    {
        public int Id { get; set; }
        public string Name { get; set; }
    }
}

Step-9 :  Add A controller

namespace WebApplication1.Controllers
{
    public class HomeController : Controller
    {
        StudentAPI _api = new StudentAPI();

        public async Task<IActionResult> Index()
        {
            List<Student> student = new List<Student>();
            HttpClient client = _api.Initial();
            HttpResponseMessage res = await client.GetAsync("api/Student");
            if (res.IsSuccessStatusCode)
            {
                var result = res.Content.ReadAsStringAsync().Result;
                student = JsonConvert.DeserializeObject<List<Student>>(result);
            }
         
            return View(student);
        }


    }
}

Step-10  : Generate View as list type 

@model IEnumerable<WebApiTestApplication.Models.Student>

@{
    ViewData["Title"] = "Index";
}

<h2>Index</h2>

<p>
    <a asp-action="Create">Create New</a>
</p>
<table class="table">
    <thead>
        <tr>
                <th>
                    @Html.DisplayNameFor(model => model.Id)
                </th>
                <th>
                    @Html.DisplayNameFor(model => model.Name)
                </th>
            <th></th>
        </tr>
    </thead>
    <tbody>
@foreach (var item in Model) {
        <tr>
            <td>
                @Html.DisplayFor(modelItem => item.Id)
            </td>
            <td>
                @Html.DisplayFor(modelItem => item.Name)
            </td>
            <td>
                @Html.ActionLink("Edit", "Edit", new { /* id=item.PrimaryKey */ }) |
                @Html.ActionLink("Details", "Details", new { /* id=item.PrimaryKey */ }) |
                @Html.ActionLink("Delete", "Delete", new { /* id=item.PrimaryKey */ })
            </td>
        </tr>
}
    </tbody>
</table>

Jacob
- February 06, 2018

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