从sql2008数据库中导出数据时出现 “异常来自 HRESULT:0x800A03EC”

从sql2008数据库中导出数据时出现  “异常来自 HRESULT:0x800A03EC”，是什么问题呢？
代码在下面，高手帮忙看看是咋回事呀？
#region 读取新闻
                            using (SqlConnection conn1 = new SqlConnection(GetConStr()))
                            {
                                conn1.Open();
                                using (SqlCommand cmd1 = new SqlCommand(cmdT, conn1))
                                {
                                    //得到ＩＤ
                                    DataSet ds = new DataSet();
                                    string fileName = name + identity;
                                    SqlDataAdapter da = new SqlDataAdapter(cmd1);
                                    da.Fill(ds);                                    #region 生成Excel文档                                    //创建一个Excel应用程序实例
                                    Microsoft.Office.Interop.Excel.Application objExcel = new Microsoft.Office.Interop.Excel.Application();
                                    //objExcel.Visible = true; //使用这段代码，你将到到Excel应用程序打开                                    //创建一个Excel文件（未保存，无文件名）
                                    Workbooks objWorkbooks = objExcel.Workbooks;
                                    _Workbook objWorkbook = objWorkbooks.Add(XlWBATemplate.xlWBATWorksheet);//默认创建sheet1                                    Sheets objSheets = objWorkbook.Worksheets;
                                    _Worksheet objWorksheet = (_Worksheet)objSheets.get_Item(1);
                                    objWorksheet.Name = "MySheet";                                    Range range = objWorksheet.get_Range("A2", "E3");                                    //生成标题                                    string[] columns = { "品牌编号", "品牌名称", "品牌的新闻总数", "媒体", "品牌", 
                                                           "新闻标题",
                                                           "新闻摘要",
                                                           "版位编号",
                                                           "报道时间",
                                                           "文章记者", "原文内容", "报道字数", 
                                                           "版面比例", "报道面积", "新闻连接",
                                                           "传播价值", "细分层面", "是否首页", 
                                                           "新闻图片", "图片数量", "文章基调编号", 
                                                           "主题_主题编", "传播主旨编号", "首发/转发/评论编号",
                                                           "报道性质编号", "版位特点编号", "区域编号", "城市编号", 
                                                           "报道类别编号", "添加录入时间", "用户编号", "来源", "附件",
                                                           "指数", "行业ID", "企业ID", "主，被动传播", "xml自定义列"};
                                    for (int k = 1; k <= columns.Length; k++)
                                    {
                                        range[0, k] = columns[k - 1].ToString();
                                    }
                                    //写入数据
                                    int i = 1;
                                    foreach (DataRow row in ds.Tables[0].Rows)
                                    {
                                        for (int j = 1; j <= ds.Tables[0].Columns.Count; j++)
                                        {
                                            range[i, j] = row[j - 1].ToString();
                                        }
                                        i++;
                                    }                                    objExcel.DisplayAlerts = false;                                    //保存文件（如果使用objWorkbook.SaveAs将不兼容excel2000,excelxp）
                                    objWorkbook._SaveAs(@"E:\ERS新闻数据\" + BrandName + "__" + dr["TOTAL"].ToString() + ".xls", Missing.Value, Missing.Value, Missing.Value, Missing.Value, Missing.Value, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Missing.Value, Missing.Value, Missing.Value, Missing.Value);                                    //关闭文件
                                    objWorkbook.Close(false, @"E:\ERS新闻数据\ghj.xls", false);
                                    //objExcel.Visible = false;
                                    objExcel = null;                                    //Microsoft.Office.Interop.Excel.ApplicationClass ac = new Microsoft.Office.Interop.Excel.ApplicationClass();                                    //ac.DefaultFilePath = "";
                                    //ac.SheetsInNewWorkbook = 2;//在创建excel的xls文件的时候默认有两个sheet 
                                    //ac.DisplayAlerts = false;//在执行saveas方法时候不弹出提示对话框，比如有同名文件是否覆盖，设成false会直接覆盖 
                                    //Microsoft.Office.Interop.Excel.Workbook wb = ac.Workbooks.Add(Type.Missing);//Workbook相当于一个excel的xls文件 
                                    //Microsoft.Office.Interop.Excel.Worksheet ws = (Microsoft.Office.Interop.Excel.Worksheet)ac.Worksheets[2];//因为前面设置了有两个sheet，所以这里是取得第2个sheet, Worksheet相当于excel文件中的一个sheet，另外注意excel的索引都是从1开始的 
                                    //foreach (DataRow row in ds.Tables[0].Rows)
                                    //{                                    //    for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
                                    //    {
                                    //        for (int j = 0; j < 38; j++)
                                    //        {
                                    //            ws.Cells[j, i] = row[j].ToString();
                                    //        }                                    //        //ac.Cells[1, 1] = row[0].ToString();
                                    //        ////  ws.Cells[1, 1] = "hello121";//往第2个sheet中的第1行第1列的格子中赋值"hello"; 
                                    //        //ac.Cells[1, 2] = "i love u";//这是往第一个sheet赋值，当像applicationclass中添加了workbook后它的cells应该只能访问到第1个sheet中的cell 
                                    //    }
                                    //}                                    ////保存文件，Excel.XlSaveAsAccessMode是设置文件的访问方式的，其他的参数可以省略 
                                    //wb.SaveAs(@"e:\test.xls", 0, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);                                    ////重要，关闭excel，清除掉excel.exe进程   
                                    //ac.Workbooks.Close();//关闭所有文件 
                                    //ac.Quit();//结束excel.exe，这行必须有，没有上一行也可以，就相当于关闭了excel应用程序，其中的文件也一同关闭了                                     ////以下几行至关重要，在ASP.NET中如无这几行，会导致excel进程无法清除的情况，这样最后会导致内存被每次导出启动的excel进程撑死,只有加上以下几行，才能将进程关闭。
                                    //int generation = GC.GetGeneration(ac);
                                    //System.Runtime.InteropServices.Marshal.ReleaseComObject(ac);
                                    //ac = null;
                                    //GC.Collect(generation);
                                    #endregion                                }
                                conn1.Close();
                                UpID = InfoID + 1;
                                identity++;
                            }
                            #endregion