protected void Button1_Click(object sender, EventArgs e)
        {
            dataclass e1 = new dataclass();

            e1.item_insert(TextBox1.Text, TextBox2.Text);
            GridView1.DataSource = e1.getitem();
            GridView1.DataBind();
            TextBox1.Text   = "";
            TextBox2.Text   = "";
            Button1.Visible = true;
            Button2.Visible = false;
            Button3.Visible = false;
        }