private void AnsCode(string url)
        {
            string date="";
            string open="";
            string high="";
            string low="";
            string close="";
            string transA="";
            string transB="";

            string str=url;

            string s1="",s2="",s3="",s4="";
            int pos1=0,pos2=0,pos3=0,pos4=0;
            int flag=0;
            while((pos1=str.IndexOf("<td align=middle>"))!=-1)
            {
                pos1+=17;
                str=str.Remove(0,pos1);
                pos2=str.IndexOf("</td>");
                s1=str.Substring(0,pos2);
                if(flag==0)
                {
                    date=s1;
                    //MessageBox.Show(date);
                    flag++;
                }
                else if(flag==4)
                {
                    close=s1;
                    flag++;
                    pos3=str.IndexOf("<td align=right>");
                    pos3+=16;
                    str=str.Remove(0,pos3);
                    pos4=str.IndexOf("</td>");
                    s1=str.Substring(0,pos4);
                    transA=s1;
                    flag++;
                    pos3=str.IndexOf("<td align=right>");
                    pos3+=16;
                    str=str.Remove(0,pos3);
                    pos4=str.IndexOf("</td>");
                    s1=str.Substring(0,pos4);
                    transB=s1;
                    flag++;
                }
                else if(flag==1)
                {
                    open=s1;
                    flag++;
                }
                else if(flag==2)
                {
                    high=s1;
                    flag++;
                }
                else if(flag==3)
                {
                    low=s1;
                    flag++;
                }
                if(flag==7)
                {
                    //处理close字符串
                    int t1=close.IndexOf("<b>");
                    t1+=3;
                    close=close.Remove(0,t1);
                    int t2=close.IndexOf("</b>");
                    close=close.Remove(t2,4);

                    flag=0;
                    //数据在列表中显示
                    ListViewItem lv=new ListViewItem();
                    //MessageBox.Show(date);
                    lv.SubItems.Clear();
                    lv.SubItems[0].Text=date;
                    lv.SubItems.Add(open);
                    lv.SubItems.Add(high);
                    lv.SubItems.Add(low);
                    lv.SubItems.Add(close);
                    lv.SubItems.Add(transA);
                    lv.SubItems.Add(transB);
                    listView1.Items.Add(lv);
                }
            }
            MessageBox.Show("采集完成");
        }