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ÔÚASP.Net MVCÖУ¬ÑéÖ¤ÊÇÔÚController²ã£¬¶ø´íÎó³ÊÏÖÊÇÔÚView²ã£¬Controller²ãÊÇͨ¹ýModelStateÊôÐÔ½øÐÐÑéÖ¤µÄ,ModelStateµÄ״̬ÊÇͨ¹ýAddModelError()·½·¨½øÐÐ Ìí¼ÓµÄ¡£
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        [AcceptVerbs(HttpVerbs.Post)]
        
public
 ActionResult Create([Bind(Exclude
=
"
CustomerId
"
)] Customer customer)
        {
            
if
 (customer.CompanyName.Length 
==
 
0
)
            {
                ModelState.AddModelError(
"
CompanyName
"

"
CompanyName²»ÄÜΪ¿Õ
"
);
            }
            
if
 (customer.EmailAddress.Length 
==
 
0
)
            {
                ModelState.AddModelError(
"
EmailAddress
"

"
EmailAddress²»ÄÜΪ¿Õ
"
);
            }
            
if
 (
!
ModelState.IsValid)
            {
                
return
 View();
            }
    


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