“”应用程序中的服务器错误“索引超出范围.必须为非负数且小于集合参数 name:index 的大小

>"索引超出范围。必须为非负数且小于集合参数 name：index 的大小。这是一个截图：这是我的应用程序的错误，当我选择要打印的文档时，应用程序将随机打印其他文档。请:(师傅需要您的帮助这是我的代码：

 protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        trackingDataContext dc = new trackingDataContext(MyClass.conn);
        if (e.CommandName == "Print")
        {
            int row = Int32.Parse(e.CommandArgument.ToString()) + (GridView1.PageIndex * GridView1.PageSize);
            GridViewRow gr = GridView1.Rows[row];
            string ID = gr.Cells[0].Text;
            string jenis_dokumen = gr.Cells[2].Text;
            string nopek = gr.Cells[4].Text;
            string rdl = "";
            var td = (from t in dc.tracking_dokumens where t.id == Convert.ToInt16(ID) select t).SingleOrDefault();
            var area = (from a in dc.field_lists where a.id == td.field_id select a).SingleOrDefault();
            if (area.field_name == "Kantor Pusat Jakarta")
            {
                if (jenis_dokumen == "SPD")
                {
                    rdl = "deklarasi.rdl";
                }
                else if (jenis_dokumen == "Panjar Dinas")
                {
                    rdl = "panjar_dinas.rdl";
                }
                else if (jenis_dokumen == "Pengajuan Panjar Kerja")
                {
                    rdl = "panjar_kerja.rdl";
                }
                else if (jenis_dokumen == "SP3")
                {
                    rdl = "sp3.rdl";
                }
                else if (jenis_dokumen == "Pertanggungjawaban Panjar Kerja")
                {
                    rdl = "pertanggungjawaban.rdl";
                }
            }
            else
            {
                if (jenis_dokumen == "SPD")
                {
                    rdl = "deklarasi_area.rdl";
                }
                else if (jenis_dokumen == "Panjar Dinas")
                {
                    rdl = "panjar_dinas_area.rdl";
                }
                else if (jenis_dokumen == "Pengajuan Panjar Kerja")
                {
                    rdl = "panjar_kerja_area.rdl";
                }
                else if (jenis_dokumen == "SP3")
                {
                    rdl = "sp3_area.rdl";
                }
                else if (jenis_dokumen == "Pertanggungjawaban Panjar Kerja")
                {
                    rdl = "pertanggungjawaban_area.rdl";
                }
            }
            Response.Redirect(MyClass.Site + "/_layouts/ReportServer/RSViewerPage.aspx?rv:RelativeReportUrl=/sites/tracking/Report/"+rdl+"&Source="+MyClass.Site+"/Report/Forms/AllItems.aspx&DefaultItemOpen=1&rp:nopek="+nopek+"&rp:id="+ID);
        }
    }