DAtAList绑定服务器段判断是否有连接

void  DataList1_ItemDataBound(object sender,DataListItemEventArgs e)
{
  Control ctrl=e.Item.Controls[0];
HyperLink hltemp=(HyperLink)ctrl.FindControl("hlTemp");//hltemp控件
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<div style="text-align:center;">
<asp:HyperLink ID="hlTemp" runat="server">
</asp:HyperLink>
</div>
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 hlTemp.Text = DataBinder.Eval(e.Item.DataItem, "Description").ToString();

                if (System.IO.Directory.Exists(
                                        Server.MapPath(
                                                "./News/gameTopic/"
                                                + Convert.ToString(
                                                        DataBinder.Eval(e.Item.DataItem,"CategoryID")))) == true)
{
//如果目录存在则增加链接
                    hlTemp.NavigateUrl = "../../news/gameTopic/"
                                        + Convert.ToString(DataBinder.Eval(e.Item.DataItem, "CategoryID"))
                                        +"/index.shtml";
                    hlTemp.Target = "_blank";
}
}