当asp.net MVC验证出错时,如何保留值？

if (!ModelState.IsValid)
{
    ModelState.AddModelError("ErrorMessage", "验证失败");
    ModelState.SetModelValue("InputValue", new ValueProviderResult(model.InputValue, model.InputValue, CultureInfo.InvariantCulture));
    return View(model);
}

if (!ModelState.IsValid)
{
    ModelState.AddModelError("ErrorMessage", "验证失败");
    TempData["InputValue"] = model.InputValue;
    return View(model);
}

if (!ModelState.IsValid)
{
    ModelState.AddModelError("ErrorMessage", "验证失败");
    ViewBag.InputValue = model.InputValue;
    return View(model);
}