Model Validation In ASP.NET Core MVC 6.0 | Code2night.com
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Model Validation In ASP.NET Core MVC 6.0

Date- Jul 11,2022

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Model Validation

Step 1:  1.)  Open Visual Studio 2022 and Click on Create a new project.

 2.) Search for MVC and select ASP.NET Core Web App(Model-View-Controller)

3.) Select Framework as .NET 6, leave other selections as default and click on Create.

Step 2: Now right-click on the Models folder, "Add” class, and name it Student.

 using System.ComponentModel.DataAnnotations;

namespace CoreValidation.Models
{
    public class Student
    {
        [Key]
        public int Id { get; set; }

        [Required(ErrorMessage = "Please enter name")]
        [StringLength(50)]
        public string Name { get; set; }

        [Required(ErrorMessage = "Please enter date of birth")]
        [Display(Name = "Date of Birth")]
        [DataType(DataType.Date)]
        public DateTime DateofBirth { get; set; }

        [Required(ErrorMessage = "Choose batch time")]
        [Display(Name = "Batch Time")]
        [DataType(DataType.Time)]
        public DateTime BatchTime { get; set; }

        [Required(ErrorMessage = "Please enter phone number")]
        [Display(Name = "Phone Number")]
        [Phone]
        public string PhoneNumber { get; set; }

        [Required(ErrorMessage = "Please enter email address")]
        [Display(Name = "Email Address")]
        [EmailAddress]
        public string Email { get; set; }

        [Required(ErrorMessage = "Please enter website url")]
        [Display(Name = "Website Url")]
        [Url]
        public string WebSite { get; set; }

        [Required(ErrorMessage = "Please enter password")]
        [DataType(DataType.Password)]
        public string Password { get; set; }

        [Required(ErrorMessage = "Please enter confirm password")]
        [Display(Name = "Confirm Password")]
        [Compare("Password", ErrorMessage = "Password and confirm password does not match")]
        public string ConfirmPassword { get; set; }
    }
}

Step 3: Now open HomeController under the Controllers folders which are added when we create a new project. Write the following code for Index and New IActionResult methods.

using CoreValidation.Models;
using Microsoft.AspNetCore.Mvc;

namespace CoreValidation.Controllers
{
    public class HomeController: Controller
    {
        private readonly ILogger<HomeController> _logger;

        public HomeController(ILogger<HomeController> logger)
        {
            _logger = logger;
        }

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

        [HttpPost]
        [ValidateAntiForgeryToken]
        public IActionResult Index(Student student)
        {
            if (ModelState.IsValid)
            {

            }
            return View();
        }
    }
}

Step 4: Right-click on the Index IActionResult method. “Add” view with default name “Index” if you don’t have it. Write the following code.

 @model CoreValidation.Models.Student

@{
    ViewData["Title"] = "Home Page";
}

<div class="card">
    <div class="card-header bg-primary text-white text-uppercase">
        <h4>Student Information</h4>
    </div>
    <div class="card-body">
        <form asp-action="Index">
            <div class="row">
                <div class="col-md-4">
                    <div class="form-group">
                        <label asp-for="Name" class="lable-control"></label>
                        <input asp-for="Name" class="form-control" />
                        <span asp-validation-for="Name" class="text-danger"></span>
                    </div>
                </div>

                <div class="col-md-4">
                    <div class="form-group">
                        <label asp-for="DateofBirth" class="lable-control"></label>
                        <input asp-for="DateofBirth" class="form-control" />
                        <span asp-validation-for="DateofBirth" class="text-danger"></span>
                    </div>
                </div>
                <div class="col-md-4">
                    <div class="form-group">
                        <label asp-for="BatchTime" class="lable-control"></label>
                        <input asp-for="BatchTime" class="form-control" />
                        <span asp-validation-for="BatchTime" class="text-danger"></span>
                    </div>
                </div>
            </div>
            <div class="row">
                <div class="col-md-4">
                    <div class="form-group">
                        <label asp-for="PhoneNumber" class="lable-control"></label>
                        <input asp-for="PhoneNumber" class="form-control" />
                        <span asp-validation-for="PhoneNumber" class="text-danger"></span>
                    </div>
                </div>
                <div class="col-md-4">
                    <div class="form-group">
                        <label asp-for="Email" class="lable-control"></label>
                        <input asp-for="Email" class="form-control" />
                        <span asp-validation-for="Email" class="text-danger"></span>
                    </div>
                </div>
                <div class="col-md-4">
                    <div class="form-group">
                        <label asp-for="WebSite" class="lable-control"></label>
                        <input asp-for="WebSite" class="form-control" />
                        <span asp-validation-for="WebSite" class="text-danger"></span>
                    </div>
                </div>
            </div>
            <div class="row">
                <div class="col-md-6">
                    <div class="form-group">
                        <label asp-for="Password" class="lable-control"></label>
                        <input asp-for="Password" class="form-control" />
                        <span asp-validation-for="Password" class="text-danger"></span>
                    </div>
                </div>
                <div class="col-md-6">
                    <div class="form-group">
                        <label asp-for="ConfirmPassword" class="lable-control"></label>
                        <input asp-for="ConfirmPassword" class="form-control" />
                        <span asp-validation-for="ConfirmPassword" class="text-danger"></span>
                    </div>
                </div>
            </div>
            <div class="form-group">
                <button type="submit" class="btn btn-primary rounded-0">Submit</button>
            </div>
        </form>
    </div>
</div>  

Step 5 : Build and run your application by pressing ctrl+F5


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