ClaveIdBienAtribute.cs

using sage.addons.amortiza.Negocio.Mantes;
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Text;

namespace sage.addons.amortiza.Negocio.Validations
{
    internal class ClaveIdBienRequiredAttribute : RequiredAttribute
    {
        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
        {
            Partidas loPartida = validationContext.ObjectInstance as Partidas;
            string lcClave = string.Empty;
            if (string.IsNullOrEmpty(value.ToString()))
            {
                lcClave = loPartida._Obtener_ClaveIdBien();
            }
            else
            {
                if (loPartida._Estado == ew.ewbase.ewMante._EstadosMantenimiento.EditandoRegistro && !loPartida._ChangeClaveIdBien)
                {
                    return ValidationResult.Success;
                }
                else
                { 
                    if (!loPartida._Existe_ClaveIdBien(value.ToString()))
                    {
                        lcClave = value.ToString().PadLeft(10, '0');
                    }
                    else
                    {
                        return new ValidationResult(ErrorMessage, new List<String>() { nameof(loPartida._ClaveIdBien) });
                    }
                }
            }
            value = lcClave;
            loPartida._ClaveIdBien = value.ToString();

            return ValidationResult.Success;
        }
    }
}