protected void ddl_Sort_SelectedIndexChanged(object sender, EventArgs e)
{
string order = ddl_Sort.SelectedValue;
if (order == "1")
{
GridView1.DataSource = bookstorebo.sortByAlphabet();
GridView1.DataBind();
}
else if (order == "2")
{
GridView1.DataSource = bookstorebo.sortByPriceLH();
GridView1.DataBind();
}
else
{
GridView1.DataSource = bookstorebo.sortByPriceHL();
GridView1.DataBind();
}
}