خلاصه کار استفاده از دو اکشن فیلتر زیر برروی اکشنهای GET و POST میباشد:
public abstract class ModelStateTransfer : ActionFilterAttribute { protected static readonly string Key = typeof(ModelStateTransfer).FullName; } public class ExportModelStateAttribute : ModelStateTransfer { public override void OnActionExecuted(ActionExecutedContext filterContext) { //Only export when ModelState is not valid if (!filterContext.Controller.ViewData.ModelState.IsValid) { //Export if we are redirecting if ((filterContext.Result is RedirectResult) || (filterContext.Result is RedirectToRouteResult)) { filterContext.Controller.TempData[Key] = filterContext.Controller.ViewData.ModelState; } } base.OnActionExecuted(filterContext); } } public class ImportModelStateAttribute : ModelStateTransfer { public override void OnActionExecuted(ActionExecutedContext filterContext) { ModelStateDictionary modelState = filterContext.Controller.TempData[Key] as ModelStateDictionary; if (modelState != null) { //Only Import if we are viewing if (filterContext.Result is ViewResult) { filterContext.Controller.ViewData.ModelState.Merge(modelState); } else { //Otherwise remove it. filterContext.Controller.TempData.Remove(Key); } } base.OnActionExecuted(filterContext); } }