protected void Button3_Click(object sender, EventArgs e)
{
string cs = ConfigurationManager.ConnectionStrings["DBConnection"].ConnectionString;
SqlConnection con = new SqlConnection(cs);
con.Open();
Shopping shopping = new Shopping
{
ProductName = TextBox1.Text
};
dlProduct.DataSource = null;
dlProduct.DataSource = shopping.Search();
dlProduct.DataBind();
ClearText();
con.Close();
}