protected override void OnActionExecuted(ActionExecutedContext filterContext)
{
string commonError = "Имате некоректни полета!";
if (!ModelState.IsValid)
{
var empty = ModelState.Keys.All(k => k != string.Empty);
// Check if has any error to show common error message
var count = ModelState.Keys.Any(k => ModelState[k].Errors.Count > 0);
var total = empty && count;
if (total)
{
ModelState.AddCommonError(commonError);
}
}
base.OnActionExecuted(filterContext);
}