Add [EmailAddress] attribute (#876)

* Add [EmailAddress] attribute

* Validate model state

Author: vanillajonathan

ExampleNet45ASPNetProject/SendGrid.ASPSamples/Controllers/EmailController.cs

@@ -23,6 +23,11 @@ public ActionResult Send()
         [HttpPost]
         public ActionResult Send(EmailContract emailContract)
         {
+            if (!ModelState.IsValid)
+            {
+                return View(model);
+            }
+            
             try
             {
                 var response= _sendGridEmailService.Send(emailContract);
@@ -37,4 +42,4 @@ public ActionResult Send(EmailContract emailContract)
         }
 
     }
-}
+}

ExampleNet45ASPNetProject/SendGrid.ASPSamples/Models/EmailContract.cs

@@ -10,22 +10,30 @@ public class EmailContract
     {
         [Required]
         [Display(Name = "From Email Address")]
+        [EmailAddress]
         public string FromEmailAddress { get; set; }
 
         public string Alias { get; set; }
 
         [Required]
         [Display(Name = "To Email Address")]
+        [EmailAddress]
         public string ToEmailAddress { get; set; }
+        
         [Display(Name = "Cc Email Address")]
+        [EmailAddress]
         public string CcEmailAddress { get; set; }
+        
         [Display(Name = "Bcc Email Address")]
+        [EmailAddress]
         public string BccEmailAddress { get; set; }
+        
         [Required]
         [Display(Name = "Subject")]
         public string Subject { get; set; }
+        
         [Required]
         [Display(Name = "Body")]
         public string Body { get; set; }
     }
-}
+}