public override void OnActionExecuted(ActionExecutedContext context)
{
if (!context.ModelState.IsValid)
{
if (context.Result is RedirectResult || context.Result is RedirectToRouteResult ||
context.Result is RedirectToActionResult)
{
if (context.Controller is Controller controller && context.ModelState != null)
{
var modelState = ModelStateHelper.SerializeModelState(context.ModelState);
controller.TempData[Key] = modelState;
}
}
}
base.OnActionExecuted(context);
}