protected void Button8_Click(object sender, EventArgs e)
    {
        presentationlayer pl = new presentationlayer();

        pl.pateint_code = TextBox22.Text;
        clsbusslayer objb = new clsbusslayer();
        DataTable    dt   = new DataTable();

        dt = objb.getpateint_byprn(pl);
        if (dt == null && dt.Rows[0][0] == null)
        {
            Response.Write("<script>alert('Record Not Found')</script>");
        }
        else
        {
            GridView1.DataSource = dt;
            GridView1.DataBind();
        }
    }