BindDropDownWithDatabase
Install Package
- Microsoft.EntityFrameworkCore.SqlServer" Version="5.0.0"
- Microsoft.EntityFrameworkCore.Tools" Version="5.0.0"
- Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="5.0.2"
Controllers[Folder]
CoursesController.cs
using ManualOperations.Data;
using ManualOperations.Models;
using Microsoft.AspNetCore.Mvc;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace ManualOperations.Controllers
{
public class CoursesController : Controller
{
private readonly DataContext _context;
public CoursesController(DataContext context)
{
_context = context;
}
//Get Section of Course Model
[HttpGet]
public IActionResult Index()
{
var courses = _context.Courses.ToList();
return View();
}
[HttpGet]
public IActionResult Create()
{
return View();
}
[HttpGet]
public IActionResult Detail(int id)
{
var courses = _context.Courses.Where(x => x.Id == id).FirstOrDefault();//Lamda Expression
return View();
}
[HttpGet]
public IActionResult Edit(int id)
{
var courses = _context.Courses.Where(x => x.Id == id).FirstOrDefault();//Lamda Expression
return View();
}
//Post Section of Course Model
[HttpPost]
public IActionResult Create(Course model)
{
return View();
}
}
}
TextController.cs
using ManualOperations.Data;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.Rendering;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace BindDropDownWithDatabase.Controllers
{
public class TextController : Controller
{
private readonly DataContext _context;
public TextController(DataContext context)
{
_context = context;
}
public IActionResult Index()
{
ViewBag.courses = new SelectList(_context.Courses, "Id", "Title");
return View();
}
}
}
Data[Folder]
DataContext.cs
using ManualOperations.Models;
using Microsoft.EntityFrameworkCore;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace ManualOperations.Data
{
public class DataContext : DbContext
{
public DataContext(DbContextOptions<DataContext>options):base(options)
{
}
public DbSet<Student> Students { get; set; }
public DbSet<Course> Courses { get; set; }
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<Student>().ToTable("Student_Table");
modelBuilder.Entity<StudentCourse>().ToTable("StudentCourse_Table");
modelBuilder.Entity<Course>().ToTable("Course_Table");
}
}
}
Models[Folder]
ApplicationUser.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace BindDropDownWithDatabase.Models
{
public class ApplicationUser
{
public string FirstName { get; set; }
public string LastName { get; set; }
public string Address { get; set; }
public Gender Gender { get; set; }
}
//enumaration
public enum Gender
{
Male,
Female,
Others
}
}
Course.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace ManualOperations.Models
{
public class Course
{
public int Id { get; set; }
public string Title { get; set; }
public string Code { get; set; }
public ICollection<StudentCourse> Enrollment { get; set; }
}
}
Student.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace ManualOperations.Models
{
public class Student
{
public int Id { get; set; }
public string Name { get; set; }
public DateTime Enrolled { get; set; }
public ICollection<StudentCourse> Enrollment { get; set; }
}
}
StudentCourse.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace ManualOperations.Models
{
public class StudentCourse
{
public int Id { get; set; }
public int StudentId { get; set; }
public int CourseId { get; set; }
public Student Student { get; set; }
public Course Course { get; set; }
}
}
ViewModels[Folder]
ApplicationUserModels.cs
using BindDropDownWithDatabase.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace BindDropDownWithDatabase.ViewModels
{
public class ApplicationUserModels
{
public string FirstName { get; set; }
public string LastName { get; set; }
public string Address { get; set; }
public Gender Gender { get; set; }
}
public enum Gendr
{
Male,
Female,
Others,
}
}
Views[Folder]
[Text->Index]
@model BindDropDownWithDatabase.Models.ApplicationUser
@{
ViewData["Title"] = "Index";
}
<h1>Index</h1>
<h4>ApplicationUser</h4>
<hr />
<div class="row">
<div class="col-md-4">
<form asp-action="Index">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<div class="form-group">
<label asp-for="FirstName" class="control-label"></label>
<input asp-for="FirstName" class="form-control" />
<span asp-validation-for="FirstName" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="LastName" class="control-label"></label>
<input asp-for="LastName" class="form-control" />
<span asp-validation-for="LastName" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Address" class="control-label"></label>
<input asp-for="Address" class="form-control" />
<span asp-validation-for="Address" class="text-danger"></span>
</div>
<div class="form-group">
<label asp-for="Gender" class="control-label"></label>
<select asp-items="ViewBag.courses">
<option value="">Select Gender</option>
</select>
<span asp-validation-for="Gender" class="text-danger"></span>
</div>
<div class="form-group">
<input type="submit" value="Create" class="btn btn-primary" />
</div>
</form>
</div>
</div>
<div>
<a asp-action="Index">Back to List</a>
</div>
@section Scripts {
@{await Html.RenderPartialAsync("_ValidationScriptsPartial");}
}
appsettings.json
{
"ConnectionStrings": {
"DefaultConnection": "Server=CHETUIWK0541\\SQL2019NEW;Database=GST;Trusted_Connection=True;MultipleActiveResultSets=True"
},
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Information"
}
},
"AllowedHosts": "*"
}
Startup.cs
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
namespace BindDropDownWithDatabase
{
public class Startup
{
public Startup(IConfiguration configuration)
{
Configuration = configuration;
}
public IConfiguration Configuration { get; }
// This method gets called by the runtime. Use this method to add services to the container.
public void ConfigureServices(IServiceCollection services)
{
services.AddControllersWithViews();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
else
{
app.UseExceptionHandler("/Home/Error");
}
app.UseStaticFiles();
app.UseRouting();
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllerRoute(
name: "default",
pattern: "{controller=Home}/{action=Index}/{id?}");
});
}
}
}
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