aspx:

<asp:Label id="lbl1" runat="server" Visible="True"></asp:Label>

cs:

string s1="SELECT  COUNT(*)  as co from pur where  status='2' and signdate >='"+ bnow+"' ";

int Num=int.Parse(CalculateQRecord(s1).ToString());
//string imgStr;
for (int i=1; i <= (Num / 100);i++)
{
   for (int j=1;j <= i;j++)
   {
      imgStr=imgStr+"<img src=images/ratingzero.gif border=0>";
   }
}

this.lbl1.Text=CalculateQRecord(s1).ToString()+imgStr;