sevomin/Sevomin.Models/AdViewModel.cs

using System;
using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace Sevomin.Models
{
    class AdViewModel
    {
        [Key]
        public long Id { get; set; }

        [DisplayName("عنوان")]
        [Required(ErrorMessage = "{0} را وارد کنید")]
        public string Title { get; set; }

        [Required(ErrorMessage = "{0} را وارد کنید")]
        [DisplayName("متن")]
        public string Description { get; set; }

        [Required(ErrorMessage = "{0} را وارد کنید")]
        [DisplayName("تعداد روز")]
        public int Duration { get; set; }

        [DisplayName("تعداد کلیک")]
        public long ClickCount { get; set; }

        [DisplayName("لینک")]
        [Required(ErrorMessage = "{0} را وارد کنید")]
        public string Link { get; set; }

        [DisplayName("تاریخ ساخته شدن")]
        public DateTime CreatedDate { get; set; }

        [DisplayName("فعال")]
        public bool Active { get; set; }

        [NotMapped]
        public bool Expired
        {
            get { return (CreatedDate.AddDays(Duration) < DateTime.Now); }
        }
        
        public AdViewModel(Ad ad)
        {
            Id = ad.Id;
            Duration = ad.Duration;
            Link = ad.Link;
            ClickCount = ad.ClickCount;
            CreatedDate = ad.CreatedDate;
            Title = ad.Title;
            Description = ad.Description;
        }
    }
}