Marcoelho97 Posts - Answer Overflow

Marcoelho97

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CC#

•Created by Marcoelho97 on 4/10/2023 in #help

❔ I apparently have an infinite loop, but I can't fix it to work

30 replies

CC#

•Created by Marcoelho97 on 12/18/2022 in #help

❔ Asp-all-route-data's initial value is changed with asp-route-*

So, I have:

var parms = new Dictionary<String, String>
{
    {"Nome", Nome.ToString() },
};

var parms = new Dictionary<String, String>
{
    {"Nome", Nome.ToString() },
};

And I have

@foreach (Tipo tipo in ViewBag.Tipos)
{
    <div>
        <a asp-all-route-data="parms" asp-route-Nome="@tipo.Id">@tipo.Nome</a>
    </div>
}

@foreach (Tipo tipo in ViewBag.Tipos)
{
    <div>
        <a asp-all-route-data="parms" asp-route-Nome="@tipo.Id">@tipo.Nome</a>
    </div>
}

After this foreach, my parms value will have changed tot he last one in my ViewBag.Tipos I don't understand why this is happening and/or how to prevent it :(

2 replies

CC#

•Created by Marcoelho97 on 12/16/2022 in #help

❔ System.NullReferenceException 'Object reference not set to an instance of an object.'

Hello! I'm getting a little desperate here: This is my index code:

public IActionResult Index()
        {
            // List<Tipo> list = _context.Tipos.ToList();
            List<string> list = new List<string>();
            list.Add("Home");
            list.Add("Home");
            list.Add("Home");
            list.Add("Home");
            return View(list);
        }

public IActionResult Index()
        {
            // List<Tipo> list = _context.Tipos.ToList();
            List<string> list = new List<string>();
            list.Add("Home");
            list.Add("Home");
            list.Add("Home");
            list.Add("Home");
            return View(list);
        }

This is my index.cshtml:

<select class="form-select" name="tipo" id="tipo">
            @foreach (var item in Model)
            {
                <option value="abc">abc</option>
            }
        </select>

<select class="form-select" name="tipo" id="tipo">
            @foreach (var item in Model)
            {
                <option value="abc">abc</option>
            }
        </select>

Why do I get this exception? I've been at it for over an hour, I'm new at this, and I'm very confused

7 replies

CC#

•Created by Marcoelho97 on 12/11/2022 in #help

✅ Multiple one to many relationships

I've just recently started using ASP.NET and I ran into a bit of a wall Basically:

    public class Reserva
    {
        public int Id { get; set; }

        public string ClienteId { get; set; }
        public ApplicationUser Cliente { get; set; }

        public string FuncionarioId { get; set; }
        public ApplicationUser Funcionario { get; set; }
    }

    public class ApplicationUser : IdentityUser
    {
        public Empresa? Empresa { get; set; }
        public ICollection<Reserva> Reservas { get; set; }
        public ICollection<Reserva> EntregasRecolhas { get; set; }

    }

    public class Reserva
    {
        public int Id { get; set; }

        public string ClienteId { get; set; }
        public ApplicationUser Cliente { get; set; }

        public string FuncionarioId { get; set; }
        public ApplicationUser Funcionario { get; set; }
    }

    public class ApplicationUser : IdentityUser
    {
        public Empresa? Empresa { get; set; }
        public ICollection<Reserva> Reservas { get; set; }
        public ICollection<Reserva> EntregasRecolhas { get; set; }

    }

How do I make a migration of this? I'm getting "Unable to determine the relationship represented by navigation 'ApplicationUser.EntregasRecolhas' of type 'ICollection<Reserva>'. Either manually configure the relationship, or ignore this property using the '[NotMapped]' attribute or by using 'EntityTypeBuilder.Ignore' in 'OnModelCreating'." And I don't know how to proceed without having to manually do it ( which I don't know how to do it either )

7 replies

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