protected override void OnNavigatedTo(NavigationEventArgs e)
        {
            base.OnNavigatedTo(e);

            if (this.NavigationContext.QueryString.ContainsKey("reid"))
            {
                string title = this.NavigationContext.QueryString["title"];
                if (title.Length > 3 && title.Substring(0, 3) == "Re:")
                {
                    TitleText.Text = title;
                }
                else
                {
                    TitleText.Text = "Re: " + title;
                }

                TypeTitle.Text = "回复";
                Board.Text     = board = this.NavigationContext.QueryString["board"];
                reid           = int.Parse(this.NavigationContext.QueryString["reid"]);

                ContentText.Focus();
            }
            else
            {
                TypeTitle.Text = "发帖";
                Board.Text     = board = this.NavigationContext.QueryString["board"];

                TitleText.Focus();
            }
        }