读取excel

 string path = row["FileAddress"].ToString().Trim();
                        Stream fs;
                        try
                        {
                            fs = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
                        }
                        catch (Exception e)
                        {
                            writeImport("Y", null, null, "未找到该文件", row["FileID"].ToString().Trim(), "");
                            continue;
                        }
                        DataTable dtnew = new DataTable();
                        if (row["FileType"].ToString().Trim() == ".xls")
                        {
                            dtnew = Common.ExcelHelper.RenderDataTableFromExcel(fs);
                        }
                        else
                        {
                            dtnew = Common.ExcelHelper.RenderDataTableFromExcel2007(fs);
                        }
                        if (dtnew != null && dtnew.Rows.Count > 0)
                        {}

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