你在哪里把你的验证放在asp.net mvc 3？

public class User
{
    [Required]
    [StringLength(50)]
    public string Name { get; set; }

    [Required]
    [EmailAddress]
    public string Email { get; set; }
}

public ActionResult Create(User user)
{
    if (ModelState.IsValid)
    {
        // 保存数据
        return RedirectToAction("Index");
    }
    return View(user);
}

@Html.ValidationSummary(true)

<div>
    @Html.LabelFor(model => model.Name)
    @Html.EditorFor(model => model.Name)
    @Html.ValidationMessageFor(model => model.Name)
</div>

<div>
    @Html.LabelFor(model => model.Email)
    @Html.EditorFor(model => model.Email)
    @Html.ValidationMessageFor(model => model.Email)
</div>