HiddenFor value is empty - asp.net-core

Question

I have a view
#using (#Html.BeginForm())
{
<div class="form-horizontal">
<h4>Person</h4>
<hr/>
#Html.ValidationSummary(true)
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<div class="form-group">
#Html.HiddenFor(x => x.PersonId)
</div>
<div class="form-group">
#Html.LabelFor(m => m.Name)
#Html.TextBoxFor(m => m.Name)
#Html.ValidationMessageFor(m => m.Name)
</div>
<div class="form-group">
#Html.LabelFor(m => m.Gender)
#Html.DropDownListFor(m => m.Gender, Html.GetEnumSelectList(typeof(Gender)))
#Html.ValidationMessageFor(m => m.Gender)
</div>
<div class="form-group">
<div class="col-md-offset-2 col-md-10">
<input type="submit" value="Create" class="btn btn-default"/>
</div>
</div>
</div>
}
And ViewModel
public class Person
{
[HiddenInput]
public int PersonId { get; set; }
[Required]
public string Name { get; set; }
public Gender Gender { get; set; }
}
public enum Gender
{
Male,
Female
}
The problem is validation complaints about PersonId being null.
It renders in browser as such (see, value is empty, but should be zero).
<div class="form-group">
<input data-val="true" data-val-required="The PersonId field is required." id="PersonId" name="PersonId" value="" type="hidden">
</div>
Could you please help? I'm using ASP.NET Core 1.8 RC2

Answer 1

Maybe you don't initialize object (Person) so the value is empty.
You could do as below then the value will not be empty.