页面中有一个gridview还有一个刷新DropDownList联动，打开页面当gridview未读取的时候使用三联动会出这样的错误，求前辈们指教！
Server   Error   in   '/ '   Application.
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Invalid   postback   or   callback   argument.     Event   validation   is   enabled   using   <pages   enableEventValidation= "true "/>   in   configuration   or   <%@   Page   EnableEventValidation= "true "   %>   in   a   page.     For   security   purposes,   this   feature   verifies   that   arguments   to   postback   or   callback   events   originate   from   the   server   control   that   originally   rendered   them.     If   the   data   is   valid   and   expected,   use   the   ClientScriptManager.RegisterForEventValidation   method   in   order   to   register   the   postback   or   callback   data   for   validation.  
Description:   An   unhandled   exception   occurred   during   the   execution   of   the   current   web   request.   Please   review   the   stack   trace   for   more   information   about   the   error   and   where   it   originated   in   the   code.  

Exception   Details:   System.ArgumentException:   Invalid   postback   or   callback   argument.     Event   validation   is   enabled   using   <pages   enableEventValidation= "true "/>   in   configuration   or   <%@   Page   EnableEventValidation= "true "   %>   in   a   page.     For   security   purposes,   this   feature   verifies   that   arguments   to   postback   or   callback   events   originate   from   the   server   control   that   originally   rendered   them.     If   the   data   is   valid   and   expected,   use   the   ClientScriptManager.RegisterForEventValidation   method   in   order   to   register   the   postback   or   callback   data   for   validation.
谢谢！


------解决方案--------------------
改为 EnableEventValidation= "false "