如何绑定列表<model>在 ASP.NET Core MVC 中创建视图</model>

Question

I am trying to create a form to collect the qualifications of students. At first, the list should contain 4 objects for four different qualifications. segment of the create view

@for (var i = 0; i < 4; i++)
{
          <div class="col-md-3 me-2">
              <label asp-for="@Model[i].Institute" class="control-label col-md"></label>
              <input asp-for="@Model[i].Institute" class="form-control" />
              <span asp-validation-for="@Model[i].Institute" class="text-danger"></span>
          </div>

          <div class="col-md-3 me-2">
              <label asp-for="@Model[i].YearGraduated" class="control-label"></label>
              <input asp-for="@Model[i].YearGraduated" class="form-control" />
              <span asp-validation-for="@Model[i].YearGraduated" class="text-danger"></span>
          </div>
}

<div class="form-group d-flex-row m-auto mt-2">
    <input type="submit" name="submit" value="Save and Continue"/>
</div>

This is my controller:

public IActionResult Create()
{
    var model = new List<Qualification>();
    model = _context.Qualifications.ToList();
    return View(model);
}

And this is the model class:

public partial class Qualification
{
    public Qualification()
    {
        Subjects = new HashSet<Subject>();
    }
    
    public int Id { get; set; }
    public int StudentId { get; set; }
    public string Institute { get; set; } = null!;
    public short YearGraduated { get; set; }
    public virtual Student Student { get; set; } = null!;

    public virtual ICollection<Subject> Subjects { get; set;
}

My problem is when I run the code, nothing is generated and no error at all.

Can anyone help?

Answer 1

Here you missing in your code.

@model List<Qualification>  // declare on top of the file
    @if(Model !=null){
        for (var i = 0; i < Model.Count; i++)
        {
                  <div class="col-md-3 me-2">
          <label asp-for="@Model[i].Institute" class="control-label col-md"></label>
          <input asp-for="@Model[i].Institute" class="form-control" />
          <span asp-validation-for="@Model[i].Institute" class="text-danger"></span>
      </div>

      <div class="col-md-3 me-2">
          <label asp-for="@Model[i].YearGraduated" class="control-label"></label>
          <input asp-for="@Model[i].YearGraduated" class="form-control" />
          <span asp-validation-for="@Model[i].YearGraduated" class="text-danger"></span>
      </div>
        }
    }