Razor page: complex modeling binding not updating model - asp.net-core

Question

So I'm trying to create a little tool where a user can select a set of days. I however need quite a complex model for extra data.
public class DayRange{
...
List<DaySelected> Days
...
}
public class DaySelected{
public bool Selected{ get; set;}
public string DayName {get; set;}
public DaySelected(string Day){
Selected = false;
DayName = day;
}
}
My Razorpage looks like this:
#Model DayRange
...
<form asp-action="RegisterSelection" asp-controller="DayRegister">
<table>
#foreach (var Day in Model.Days)
{
<tr>
<td>
<input asp-for=#Day.Selected />
</td>
</tr>
}
</table>
<button type="submit">Confirm</button>
</form>
My method Registerselection looks like this:
[HttpPost]
public IActionResult RegisterSelection(DayRange dr){
...
}
However, whenever I change any of textboxes, all of the selected bool values remain the same. Can anybody help me on my way? Thanks in advance!

Answer 1

Here is a demo to pass data to action correctly:
Model:
public class DayRange
{
public List<DaySelected> Days { get; set; }
}
public class DaySelected
{
public bool Selected { get; set; }
public string DayName { get; set; }
public DaySelected()
{
}
public DaySelected(string Day)
{
Selected = false;
DayName = Day;
}
}
View:
#Model DayRange
<form asp-action="RegisterSelection" asp-controller="DayRegister">
<table>
#{ var i = 0;}
#foreach (var Day in Model.Days)
{
<tr>
<td>
<input asp-for=#Day.Selected name="Days[#i].Selected" />
#Day.DayName
<input asp-for=#Day.DayName name="Days[#i].DayName" hidden />
</td>
</tr>
i ++;
}
</table>
<button type="submit">Confirm</button>
</form>
result: