public async Task <IActionResult> Page(int cid)
{
var VM = new ArticleViewModel();
VM.content = await pageCache.GetByCid(cid);
if (VM.content == null)
{
Message.Show(new Widget.MessageModel()
{
Content = "页面似乎已经丢失，请返回首页。"
});
}
ViewData.Model = VM;
return(View());
}