aspnet

  Spreadsheet spread;
                Worksheet ws;
                spread = new SpreadsheetClass();
                if (spread == null)
                {
                    base.AppendMessage("无法创建owc对象，可能您的机子未安装owc");
                    return;
                }
                ws = spread.ActiveSheet;
                int iStart = 1;                ws.Cells[iStart, 1] = "Date";
                ws.Cells[iStart, 2] = "EmployeeCode";
                ws.Cells[iStart, 3] = "EmployeeName";
                ws.Cells[iStart, 4] = "Orgcode1";
                ws.Cells[iStart, 5] = "Category";
                ws.Cells[iStart, 6] = "Status";
                ws.Cells[iStart, 7] = "Message";
                for (int i = 0; i < dt.Rows.Count;i++ )
                {
                    iStart = iStart + 1;
                    ws.Cells[iStart, 1] = DateTime.Parse(dt.Rows[i][1].ToString().Trim()).ToString("yyyy/MM/dd");
                    ws.Cells[iStart, 2] = "'"+dt.Rows[i][2].ToString().Trim();
                    ws.Cells[iStart, 3] = dt.Rows[i][3].ToString().Trim();
                    ws.Cells[iStart, 4] = dt.Rows[i][4].ToString().Trim();
                    ws.Cells[iStart, 5] = dt.Rows[i][5].ToString().Trim();
                    ws.Cells[iStart, 6] = dt.Rows[i][6].ToString().Trim();
                    ws.Cells[iStart, 7] = dt.Rows[i][7].ToString().Trim();
                }
                string strReport = strFilePath + "Metso_log.xls";
                try
                {
                    spread.Export(strReport, SheetExportActionEnum.ssExportActionNone, SheetExportFormat.ssExportHTML);
                }
                catch (Exception ex)
                {
                    base.AppendMessage(ex.Message + " Please close file " + strReport + " first!");
                    return;
                }
 System.IO.FileInfo file = new System.IO.FileInfo(path);
            Response.Clear();
            Response.Charset = "GB2312";
            Response.ContentEncoding = System.Text.Encoding.UTF8;
            Response.AddHeader("Content-Disposition", "attachment; filename = " + Server.UrlEncode(file.Name));
            Response.AddHeader("Content-Length", file.Length.ToString());
            Response.ContentType = "application/ms-excel";
            Response.WriteFile(file.FullName);
            Response.Flush();
            Response.End();
请问 导出到excel 用上面那些对象怎么设置excel中一个单元格的宽度？