--- a/Agendas/trunk/src/Agendas.Web/Models/PersonaModel.cs	Wed Oct 19 22:59:02 2011 -0300
+++ b/Agendas/trunk/src/Agendas.Web/Models/PersonaModel.cs	Thu Oct 20 08:16:55 2011 -0300
@@ -1,7 +1,10 @@
 using System;
 using System.Collections.Generic;
+//using System.ComponentModel.DataAnnotations;
 using System.ComponentModel.DataAnnotations;
 using System.Web.Mvc;
+using DataAnnotationsExtensions;
+
 
 namespace AltNetHispano.Agendas.Web.Models
 {
@@ -15,12 +18,14 @@
         public string Nombre { get; set; }
 
         [Required]
+        [CustomValidation(typeof(PersonaValidation), "IsTwitterAccount")]
         public string Twitter { get; set; }
 
         [Required]
+        [Email]
         public string EMail { get; set; }
 
-		[DataType(DataType.Url)]
+		[Url]
     	public string Blog { get; set; }
 
 		public string[] Roles { get; set; }
@@ -36,12 +41,14 @@
         public string Nombre { get; set; }
 
         [Required]
+        [CustomValidation(typeof(PersonaValidation), "IsTwitterAccount")]
         public string Twitter { get; set; }
 
         [Required]
+        [Email]
         public string EMail { get; set; }
 
-		[DataType(DataType.Url)]
+        [Url]
     	public string Blog { get; set; }
 
 		public string[] Roles { get; set; }
@@ -70,4 +77,17 @@
         [HiddenInput]
         public string Blog { get; set; }
     }
+
+    //TODO: Ver donde movemos esta clase.
+    public class PersonaValidation
+    {
+        public static ValidationResult IsTwitterAccount(string value)
+        {
+            //[RegularExpression(@"^([\w\d\-\.]+)$")]
+            return value.StartsWith("@")
+                       ? new ValidationResult("No debe ingresar el arroba al escribir la cuenta de twitter.")
+                       : ValidationResult.Success;
+        }
+    }
+
 }
\ No newline at end of file