关于MVC3中 Remote　的参数取值问题
网上看到的例子，当将model当成一个属性时，验证方法传过来的参数就为空？源码如下
model类：
public class User
{
[Required(ErrorMessage="姓名不能为空")]
[Remote("IsUnique_Available","Home")]
public string Name { get; set; }
}

封装后的Users类
public class EditUserVM
{
/// <summary>
/// User VM
/// </summary>
public User Users
{
get;
set;
}
}
view页面：
@model MvcRemoteValidation.ViewModels.UserViewModels.EditUserVM

@{
ViewBag.Title = "Create";
Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Create</h2>

<script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>

@using (Html.BeginForm()) {
@Html.ValidationSummary(true)
<fieldset>
<legend>User</legend>

<div class="editor-label">
@Html.LabelFor(model => model.Users.Name)
</div>
<div class="editor-field">
@Html.EditorFor(model => model.Users.Name)
@Html.ValidationMessageFor(model => model.Users.Name)
</div>

<p>
<input type="submit" value="Create" />
</p>
</fieldset>

}

<div>
@Html.ActionLink("Back to List", "Index")
</div>
Controller中的代码：
public JsonResult IsUnique_Available(string Name)//User封装成属性后无法取到值？
{
List<User> users = UserService.GetUsers();
users = users.Where(u => u.Name == Name).ToList();
if (users.Count == 0)
return Json(true, JsonRequestBehavior.AllowGet);

string suggestedUID = String.Format(CultureInfo.InvariantCulture,
"{0} 已经存在。", Name);


return Json(suggestedUID, JsonRequestBehavior.AllowGet);
}


这时，IsUnique_Available方法中的参数name,传过来的都为null　？　但如果在view页面，直接用User,参数就可取到值，请问各位，是什么原因？谢谢！

        public JsonResult IsUnique_Available(EditUserVM model)
        {
            List<User> users = UserService.GetUsers();
            users = users.Where(u => u.Name == model.Users.Name).ToList();
            if (users.Count == 0)
                return Json(true, JsonRequestBehavior.AllowGet);

            string suggestedUID = String.Format(CultureInfo.InvariantCulture, 
 
            "{0} 已经存在。", model.Users.Name);


            return Json(suggestedUID, JsonRequestBehavior.AllowGet);
        }