protected void Button3_Click(object sender, EventArgs e) { dataclass e1 = new dataclass(); e1.heli_delete(TextBox1.Text); GridView3.DataSource = e1.heliitem(); GridView3.DataBind(); TextBox1.Text = ""; TextBox2.Text = ""; TextBox3.Text = ""; TextBox4.Text = ""; Button1.Visible = true; Button2.Visible = false; Button3.Visible = false; }