i am no able to perform add-migration in

Question

using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using _Istudnet.Helper;
 

namespace _Istudnet.Models
{
    public class Student
    {
        [Key]
  
        public int Id { get; set; }
        [mycustomeValidation(text:"Incadea")]
        public string Name { get; set; }
       
        public string Description { get; set; }
        public string Email { get; set; }

        public IFormFile simg { get; set; }
    }
}

Error : The property 'Student.simg' is of an interface type ('IFormFile'). If it is a navigation, manually configure the relationship for this property by casting it to a mapped entity type. Otherwise, ignore the property using the [NotMapped] attribute or 'Ignore' in 'OnModelCreating'.

Answer 1

If you want to store an image, you should use a byte array type:

public byte[] Simg { get; set; }

Now, when you read your IFormFile you can add it to your entity like so:

var file = request.FormFileFromSomewhere
using var ms = new MemoryStream();
file.CopyTo(ms);
myStudent.Simg = ms.ToArray();