ASP.NET MVC CheckBoxFor的int to bool

<div class="form-group">
<label class="col-md-3 control-label">选项</label>
<div class="col-md-4">
@Html.CheckBoxFor(m => m.EnabledValue) 有效
@Html.CheckBoxFor(m => m.IsUnfoldValue) 展开
@Html.CheckBoxFor(m => m.AllowEditValue) 允许编辑
@Html.CheckBoxFor(m => m.AllowDeleteValue) 允许删除
<span class="help-block">
</span>
</div>
</div>

/// <summary>
/// 有效：1-有效，0-无效
/// </summary>
public int? Enabled
{
set{ _enabled=value;}
get{return _enabled;}
}
public bool EnabledValue
{
get { return Enabled == 1; }
set { Enabled = value ? 1 : 0; }
}

public ActionResult Edit(string id)
{
ViewBag.ControllerName = RouteData.Values["controller"].ToString().ToLower();
var model = new SAS.Model.BPMS_SysMenu();
model=bll.GetModel(id);
if (model != null)
{
ParentDropDownList();
return View(model);
}
else
{
return View("404");
}
}

[HttpPost, ValidateInput(false)]
public ActionResult Edit(string id, FormCollection fc)
{
var model = bll.GetModel(id);
if (model != null)
{

UpdateModel(model);  //修改数据
bll.Update(model);
return RedirectToAction("ModuleList");
}
else
return View("404");
}

1-有效，0-无效