protected void Button_choose_Click(object sender, EventArgs e) { this.U_updatenews1.Visible = false; this.U_insertnews1.Visible = false; this.Panel_news.Visible = true; IList <News> newslist = new List <News>(); UseFunc uf = new UseFunc(); if (this.TextBox_key.Text == "") { newslist = uf.GetNewsIsused(true); } else { newslist = uf.GetNewsList(this.TextBox_key.Text); } bind(newslist); }