/// <summary>
/// 编辑页面
/// </summary>
/// <param name="id">对象ID</param>
/// <returns>用户编辑页面</returns>
public virtual ActionResult Edit(int id = 0)
{
var t = (id > 0) ? _dataProvider.GetByKey(id) : SiteManager.Get <T>();
Session["Editing_" + id] = t;
//ViewBag.ShowSearchBox = false;
BeforeShowEditForm(t);
return(View(t));
}