/// <summary>
/// 添加到收藏列表
/// </summary>
/// <param name="favorite">收藏的物品对象</param>
/// <param name="treasureUID">收藏物品的UID</param>
/// <param name="returnUrl">返回的Url</param>
/// <returns>重定向浏览器，浏览一个新的URL</returns>
public RedirectToRouteResult AddToFavorite(Favorite favorite, Guid treasureUID, string returnUrl)
{
//获取当前UID的物品对象
Treasure treasure = repository.Treasures.FirstOrDefault(t => t.TreasureUID == treasureUID);
//如果物品对象存在，则添加收藏
if (treasure != null)
{
favorite.AddItem(treasure, 1);
}
return(RedirectToAction(
actionName: "Index",
routeValues: new
{
returnUrl
}
));
}