listview的ItemDataBound事件进行数据绑定时，出现未处理的“System.StackOverflowException”类型的错误

protected void ListView1_ItemDataBound(object sender, ListViewItemEventArgs e)    {        ListViewDataItem dataItem = (ListViewDataItem)e.Item;        int index = dataItem.DisplayIndex;        DataSet ds = new DataSet();        ds.ReadXml(Server.MapPath("msg.xml"));//未处理的“System.StackOverflowException”类型的异常出现在 mscorlib.dll                rowdata = ds.Tables[0].Rows[index]["staff"].ToString();        if (rowdata.Length > 0)        {            int length = rowdata.Length - 1;            rowdata = rowdata.Substring(0, length);            //HyperLink hyperlink1 = (HyperLink)e.Item.FindControl("HyperLink1");            //HyperLink hyperlink1 = new HyperLink();            Panel panel = (Panel)dataItem.FindControl("panel1");            string[] files = rowdata.Split('#');            int L = files.Length;            for (int i = 0; i < L; i++)            {                string[] filename = files[i].Split('@');                //Response.Write(filename[0]);                HyperLink hyperlink1 = new HyperLink();                hyperlink1.NavigateUrl = "usersUpload/" + filename[0];                //Response.Write(filename[0]);                hyperlink1.Text = "<img alt='附件：'src='image/zip.jpg' style='border:0px;' />  " + filename[0] + "<br/>";                hyperlink1.ID = "file";                panel.Controls.Add(hyperlink1);                //hyperlink1.Text = hyperlink1.Text+ filename[0] ;            }            //Response.Write(files[3]);            //hyperlink1.Text = test;        }        bindGrid();    }public void bindGrid()    {        DataSet ds = new DataSet();        ds.ReadXml(Server.MapPath("msg.xml"));                if (ds.Tables.Count != 0)        {                        ListView1.DataSource = ds.Tables[0];            ListView1.DataBind();            ds.Dispose();            Label1.Visible = false;        }        else        {            Label1.Visible = true;        }    }