索引超出范围。必须为非负值并小于集合大小

索引超出范围。必须为非负值并小于集合大小。求助

C# code

if (!IsPostBack)        {            cb_selAll.Attributes.Add("onclick", "cb('cb_selAll')");//添加全选功能            //设置页面显示            pageSet.RepeaterPageLoad(myDs, lbl_Pagesize, lbl_PageMessage, lnkbtn_First, lbtnPrevious, lbtnNext, lnkbtn_Last, rpt);            int uid = Convert.ToInt32(myCookie.getUserID());            if (Request["creatorID"] != null)            {                for (int i = 0; i < myDs.Tables[0].Rows.Count; i++)                {                    int creator = Convert.ToInt32(Request["creatorID"]);                    if (creator != uid)                    {                        rpt.Items[i].FindControl("HyperLink7").Visible = false;//索引超出范围。必须为非负值并小于集合大小。参数名: index                     }                }            }                       //设置权限            pageSet.setPageLimite(myCookie.getRoleIds(), LimitID, "cb_id", "HyperLink7", rpt, tab_Edit);                   }