C#•2d ago

CRUD webapp Form is accepting empty responses after applying validations

I am stuck in making CRUD app first i Downloaded packages of EF then i create model class and db context and create migrations then i start creating my first view for creating/inserting data but the problem is when i run the program and try to insert nothing happens it only redirects me to index and when I open database to check wheather it is enter or not nothing was shown and also validations are not working #web

16 Replies

Angius•2d ago

Gonna need to see some code

Technical DeveloperOP•2d ago

yeh just 1 min posting visual studio is crashed HomeController.cs

 
using System.Diagnostics;
using crudapp.Migrations;
using crudapp.Models;
using Microsoft.AspNetCore.Mvc;
using Students = crudapp.Models.Students;

namespace crudapp.Controllers
{
    public class HomeController : Controller
    {
        private readonly StudentDbContext studentDb;
        public HomeController(StudentDbContext studentDbContext)
        {
            this.studentDb = studentDbContext;
        }


        public IActionResult Index()
        {
            return View();
        }
        [Route("/AddStudent")]
        [HttpGet]
        
        public IActionResult AddStudent()
        {
            return View();
        }

        [HttpPost]
        [ValidateAntiForgeryToken]
        public async Task<IActionResult> AddStudent([Bind("Id,Name,Email,Phone,Age")] Students Student)
        {
            if (ModelState.IsValid)
            {   
                studentDb.Students.Add(Student);
                studentDb.SaveChanges();
                return RedirectToAction("Read");
            }
            return View(Student);
        }

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

        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
        }
    }
}

 
using System.Diagnostics;
using crudapp.Migrations;
using crudapp.Models;
using Microsoft.AspNetCore.Mvc;
using Students = crudapp.Models.Students;

namespace crudapp.Controllers
{
    public class HomeController : Controller
    {
        private readonly StudentDbContext studentDb;
        public HomeController(StudentDbContext studentDbContext)
        {
            this.studentDb = studentDbContext;
        }


        public IActionResult Index()
        {
            return View();
        }
        [Route("/AddStudent")]
        [HttpGet]
        
        public IActionResult AddStudent()
        {
            return View();
        }

        [HttpPost]
        [ValidateAntiForgeryToken]
        public async Task<IActionResult> AddStudent([Bind("Id,Name,Email,Phone,Age")] Students Student)
        {
            if (ModelState.IsValid)
            {   
                studentDb.Students.Add(Student);
                studentDb.SaveChanges();
                return RedirectToAction("Read");
            }
            return View(Student);
        }

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

        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
        }
    }
}

@Angius which part i first show here is the controller code now sharing view code

Angius•2d ago

I think I can already see the potential error

Technical DeveloperOP•2d ago

ok and what is that

Angius•2d ago

Presumably, your form doesn't fill all the properties of Student, since it's a database entity and the form wouldn't have fields for things like ID or foreign keys You should be using a viewmodel here Make a class or a record that contains only what the form sends Then you can even skip the [Bind]

Technical DeveloperOP•2d ago

wait AddStudent.cshtml

@{
    ViewData["Title"] = "AddStudent";
    @model crudapp.Models.Students;
}

<div class="container m-5" >
    <form method="post" asp-asp-controller="Home" asp-action="Index">
        <div class="mb-3">
            <label>Name: </label>
            <input type="text" asp-for="Name" />
            <span asp-validation-for="Name" class="Text-danger"></span>
        </div>
        
        <div class="mb-3">
            <label>Email: </label>
            <input type="Email" asp-for="Email" />
            <span asp-validation-for="Email" class="Text-danger"></span>
        </div>

        <div class="mb-3">
            <label>Phone: </label>
            <input type="text" asp-for="Phone" />
            <span asp-validation-for="Phone" class="Text-danger"></span>
        </div>

        <div class="mb-3">
            <label>Age: </label>
            <input type="number" asp-for="Age" />
            <span asp-validation-for="Age" class="Text-danger"></span>
        </div>
        <input type="submit" value="Submit" />
    </form>
</div>

@{
    ViewData["Title"] = "AddStudent";
    @model crudapp.Models.Students;
}

<div class="container m-5" >
    <form method="post" asp-asp-controller="Home" asp-action="Index">
        <div class="mb-3">
            <label>Name: </label>
            <input type="text" asp-for="Name" />
            <span asp-validation-for="Name" class="Text-danger"></span>
        </div>
        
        <div class="mb-3">
            <label>Email: </label>
            <input type="Email" asp-for="Email" />
            <span asp-validation-for="Email" class="Text-danger"></span>
        </div>

        <div class="mb-3">
            <label>Phone: </label>
            <input type="text" asp-for="Phone" />
            <span asp-validation-for="Phone" class="Text-danger"></span>
        </div>

        <div class="mb-3">
            <label>Age: </label>
            <input type="number" asp-for="Age" />
            <span asp-validation-for="Age" class="Text-danger"></span>
        </div>
        <input type="submit" value="Submit" />
    </form>
</div>

see here is my view

Angius•2d ago

Yeah, and Student model?

Technical DeveloperOP•2d ago

using System.ComponentModel.DataAnnotations;

namespace crudapp.Models
{
    public class Students
    {
        [Key]
        public int Id { get; set; }
        [Required]
        [StringLength(50)] 
        public string Name { get; set; }
        [Required]
        [StringLength(100)]
        [EmailAddress]
        public string Email { get; set; }
        [Required]
        public string Phone { get; set; }
        [Required]
        public int Age { get; set; }
    }
}

using System.ComponentModel.DataAnnotations;

namespace crudapp.Models
{
    public class Students
    {
        [Key]
        public int Id { get; set; }
        [Required]
        [StringLength(50)] 
        public string Name { get; set; }
        [Required]
        [StringLength(100)]
        [EmailAddress]
        public string Email { get; set; }
        [Required]
        public string Phone { get; set; }
        [Required]
        public int Age { get; set; }
    }
}

and here is the dbContext

using Microsoft.EntityFrameworkCore;

namespace crudapp.Models
{
    public class StudentDbContext : DbContext
    {
        public StudentDbContext(DbContextOptions<StudentDbContext> options) :base (options)
        {
            
        }
        public DbSet<Students> Students { get; set; }
    }
}

using Microsoft.EntityFrameworkCore;

namespace crudapp.Models
{
    public class StudentDbContext : DbContext
    {
        public StudentDbContext(DbContextOptions<StudentDbContext> options) :base (options)
        {
            
        }
        public DbSet<Students> Students { get; set; }
    }
}

Angius•2d ago

Yeah, the form does not fill the Id Hence the validation error

Angius•2d ago

Technical DeveloperOP•2d ago

ok i am getting confused can u describe a little bit where to create this class for all my records

Angius•2d ago

Wherever

Technical DeveloperOP•2d ago

and what to write in it can u share a tutorial for that please

Angius•2d ago

Just the properties that the form sets

Technical DeveloperOP•2d ago

ok @Angius now i have added my viewModel but i am thinking what to do with this becuase my Sir didn't tell me this thing i saw this thing for the first time so i check online tutorials now what to do

Angius•2d ago

You use that to construct your database model

Gaming

Programming

CRUD webapp Form is accepting empty responses after applying validations

Did you find this page helpful?