How do I insert a new column for the Name attribute in ASP.NET Core Identity without using the Username field?

I'm currently utilizing ASP.NET Core Identity within my project. I have a form that includes fields for Name and Username. The issue arises when attempting to save values from the Name field, as it triggers an error stating that they are not in the correct Username format. For example, "John Doe" is deemed invalid due to not being in username format. How can I successfully create a custom column for Name so that the AspNetUsers table is adjusted to store these values separately in a distinct "Name" column rather than within the existing "Username" column?

Here are the steps I've taken thus far:

// ApplicationUser.cs

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Threading.Tasks;
    using Microsoft.AspNetCore.Identity;
    
    
    namespace VideoRentalStore.Data
    {
        public class ApplicationUser : IdentityUser
        {
            public string Name { get; set; } // Added this new column to the ApplicationUser model.
    
            public string Username { get; set; }
    
            public override string Email { get; set; }
    
            public string Password { get; set; }
    
            public string ConfirmPassword { get; set; }
        }
    }
    Executed a new migration: *dotnet ef migrations create "20230216".* There were no changes detected in the 'migrations' directory.

Included a column in the view: Register.cshtml:

<form method="post">
    @Html.AntiForgeryToken()
    <div asp-validation-summary="All" class="text-danger"></div>

// New column

    <div class="form-group">
        <label asp-for="Input.Name"></label> 
        <input asp-for="Input.Name" class="form-control" />
        <span asp-validation-for="Input.Name" class="text-danger"></span>
    </div>

    <div class="form-group">
        <label asp-for="Input.Username"></label>
        <input asp-for="Input.Username" class="form-control" />
        <span asp-validation-for="Input.Username" class="text-danger"></span>
    </div>

    <div class="form-group">
        <label asp-for="Input.Email"></label>
        <input asp-for="Input.Email" class="form-control" />
        <span asp-validation-for="Input.Email" class="text-danger"></span>
    </div>

    <div class="form-group">
        <label asp-for="Input.Password"></label>
        <input asp-for="Input.Password" class="form-control" />
        <span asp-validation-for="Input.Password" class="text-danger"></span>
    </div>

    <div class="form-group">
        <label asp-for="Input.ConfirmPassword"></label>
        <input asp-for="Input.ConfirmPassword" class="form-control" type="password" />
        <span asp-validation-for="Input.ConfirmPassword" class="text-danger"></span>
    </div>
    <button type="submit" class="btn-primary">Register</button>


</form>

// Updated the input model and post action in Register.cshtml.cs:

public class InputModel
{
    [Required]
    [StringLength(200)]
    [Display(Name = "Name")]
    public string Name { get; set; }

    [Required]
    [StringLength(200)]
    [Display(Name = "Username")]
    public string Username { get; set; }

    [Required]
    [EmailAddress]
    [Display(Name = "Email")]
    public string Email { get; set; }

    [Required]
    [StringLength(100, ErrorMessage = "The {0} must be at least {2} and at max {1} characters long.", MinimumLength = 6)]
    [DataType(DataType.Password)]
    [Display(Name = "Password")]
    public string Password { get; set; }

    [DataType(DataType.Password)]
    [Display(Name = "Confirm password")]
    [Compare("Password", ErrorMessage = "The password and confirmation password do not match.")]
    public string ConfirmPassword { get; set; }
}


[HttpPost]
public async Task<IActionResult> OnPostAsync()
{
    if (ModelState.IsValid)
    {
        var user = new ApplicationUser
        {
            Name = Input.Name,
            UserName = Input.Username,
            Email = Input.Email
        };

A "Name" column has been added to the database, yet it continues to validate based on the Username format. My query revolves around whether the AspNetUsers table is the appropriate location for incorporating this new column.

// User form

https://i.sstatic.net/B4s11.png

// Invalid username message

https://i.sstatic.net/8ZzM5.png

Answer №1

Currently, I am utilizing ASP.NET Core Identity in my project. The issue I am facing involves a form with fields for Name and Username. Whenever I attempt to save values from the Name field, an error is triggered stating that they do not adhere to the required Username format. For instance, "John Doe" is flagged as not being in username format. How can I incorporate a custom column for names so that the AspNetUsers table undergoes alterations and stores these values in a distinct "Name" column separate from the "Username" column?

Having reviewed your explanation thoroughly and analyzed the shared code snippet, I have replicated the issue as demonstrated below:

Issue Reproduced:

https://i.sstatic.net/1Xfwd.gif

Cause of Error:

The error encountered when adding a new column named "Name" is quite understandable. This occurs because within your Migration folder, if you expand your IdentityAppDbContextModelSnapshot, you will notice that there already exists a property named "Username," as illustrated below:

https://i.sstatic.net/LYXsC.png

Hence, during the execution of your Migration command, it interprets the new addition conflicting with the existing property, resulting in the specific error message.

Resolution Steps:

To resolve this issue, kindly follow the steps outlined below:

  1. Delete All Files within Migration Folder:

You must eliminate all existing migration snapshots and related files from the folder. Here's how you can do it:

https://i.sstatic.net/wkM1l.png

Note: Ensure to delete all files within the Migration folder.

  1. Drop Your Complete Identity Project Database:

In conjunction with deleting the Migration folder contents, you will also need to drop your Identity Project Database entirely. You can accomplish this by following these steps:

https://i.sstatic.net/48pYo.png

Note: Locate your database and proceed to drop or remove it accordingly.

  1. Rebuild Project Completely And Execute Migration Command:

Subsequent to deleting both the existing Migration files and the database, proceed to rebuild your entire project. Then, execute the Migration command and update the data as needed. This should facilitate the seamless addition of your new property without encountering any hindrances.

Output:

https://i.sstatic.net/j9NbV.gif

Note: For further insights on customizing the Identity model, please refer to our official documentation here.

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