Build Failed as migration the class

Question

Hi

below I've the class and I want to do the migration with it

namespace WebApp3.Shared.Models
{
    public partial class Developer
    {

 public DateTime? DateSolde { get; set; }
 public List<string> Labels { get; set; }
 public bool IsOpen
 {
 get
 {
 return this.DateSolde .HasValue;
 }
 set
 {
 if (!this.DateSolde .HasValue)
 {
 this.DateSolde = DateTime.Now;
 }
 }
 }
    }
}

When I launched add-migration Initial The build is Failed. I don't understand why? Have you an idea?
Thanks in advance

Answer 1

Hi @sblb ,

  int close = context.Developers.Count(a => a.DateSolde.Month == DateTime.Today.Month);    

The problem is that when I put DateTime? DateSolde I've the does not include a month definition.

Since the DateSolde property is nullable, before the Count method, add a ToList() method, and for the DateSolde property, add a ? character, like this:

int close = context.Developers.ToList().Count(a => a.DateSolde?.Month == DateTime.Today.Month);  

The result as below:

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Best regards,
Dillion

Answer 2

Hi, thanks to your reply. I added ? and I've always the problem.

Answer 3

The build is fail because I've put in controller

 public IActionResult MonthlyStats()
        {

            int close = context.Developers.Count(a => a.DateSolde.Month == DateTime.Today.Month);

            .....

        }

The problem is that when I put DateTime? DateSolde I've the does not include a month definition.
What can I do about it?