public void casi()
    {
        string sql = "select * from Casi ORDER BY YeuThich Desc";

        con.Open();
        SqlDataAdapter da = new SqlDataAdapter(sql, con);
        DataSet        ds = new DataSet();

        da.Fill(ds);
        NgheSi__.DataSource = ds;
        NgheSi__.DataBind();
        con.Close();
    }
    public void casi()
    {
        string macasi = Request.QueryString["L"].ToString();
        string sql    = "select * from Casi Where MaCaSi='" + macasi + "'";

        con.Open();
        SqlDataAdapter da = new SqlDataAdapter(sql, con);
        DataSet        ds = new DataSet();

        da.Fill(ds);
        NgheSi__.DataSource = ds;
        NgheSi__.DataBind();
        con.Close();
    }