javascript - Save data to ViewState -

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i can tried save data viewstate, error: microsoft jscript runtime error: sys.webforms.pagerequestmanagerservererrorexception: error serializing value 'hermessaas.bussinesprocess.bussinesservices.candidateservice' of type 'hermessaas.bussinesprocess.bussinesservices.candidateservice.' code:

private iactionservice actionservice     {                 {             return viewstate["actionservice"] iactionservice;         }         set         {             viewstate["actionservice"] = value;         }     }  private void initializefield(iactionservice service)         {             actionservice = service;         }

how can store value viewstate?

s hermessaas.bussinesprocess.bussinesservices.candidateservice decorated serializable attribute?

eg:

[serializable] public class candidateservice {  }

if not simple class recommend storing in session rather viewstate take longer page download , render


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