private void getAllCategories()
{
ECommerceBusiness ecb = new ECommerceBusiness();
DataTable dt = ecb.GetAllCategories();
if (dt.Rows.Count > 0)
{
ListItem item = new ListItem("Select Category", "-1");
ddlProductCategory.DataSource = dt;
ddlProductCategory.DataBind();
ddlProductCategory.Items.Insert(0, item);
}
}