ASP. NET-page pass value request.querstring[]. ToString ();

public partial class webform2:system.web.ui.page{    BLL. CATEGORYBLL CATEGORYBLL = new Categorybll ();    Bll. NEWSBLL NEWSBLL = new Newsbll ();    Receives the classification ID    string NewsId = string. Empty;    protected void Page_Load (object sender, EventArgs e)    {        //Receive classification id        NewsId = request.querystring["id"]. ToString ();        if (! Page.IsPostBack)        {            datasourcebind ();        }    }    public void Datasourcebind ()    {        //Remove news this.rep_allnews based on category ID        . DataSource = Newsbll. Selectnewstocategoryid (NewsId);        This.rep_allnews. DataBind ();    }}

ASP. NET-page pass value request.querstring[]. ToString ();