public static void FillDropDownListCategory(DropDownList ddl)
{
CategoryBAL balCategory = new CategoryBAL();
ddl.DataSource = balCategory.SelectForDropDownList();
ddl.DataValueField = "CategoryID";
ddl.DataTextField = "CategoryName";
ddl.DataBind();
ddl.Items.Insert(0, new ListItem("Select Category", "-1"));
}
