Пример #1
0
        /// <summary>
        /// Import the excel and return specifid List
        /// </summary>
        /// <param name="entityType">the data entity type</param>
        /// <param name="s">excel stream</param>
        /// <param name="ruleItemList">mapping rule list</param>
        /// <param name="processCount">the ref imported process count</param>
        /// <returns></returns>
        public static List <Object> GetImportDataList(Type entityType, FileData fileData, out int processCount)
        {
            ICollection <MapRuleItem> ruleItemList = fileData.MapRule.RuleItemList;
            List <Object>             dataList     = new List <Object>(); // the return data List

            processCount = 0;
            try
            {
                IWorkbook workbook = null;
                ISheet    sheet    = null;
                int       startRow = 1; // 我们认为所有EXCEL都有HEADER


                if (fileData.FileType == (int)FileTypeEnum.XLSX)// 2007
                {
                    workbook = new XSSFWorkbook(fileData.UploadFile.InputStream);
                }

                if (fileData.FileType == (int)FileTypeEnum.XLS)// 2003
                {
                    workbook = new HSSFWorkbook(fileData.UploadFile.InputStream);
                }

                if (fileData.FileType == (int)FileTypeEnum.CSV)   // csv
                // csv 处理
                {
                }

                if (workbook != null)
                {
                    sheet = workbook.GetSheetAt(0);
                }

                if (sheet != null)
                {
                    IRow firstRow  = sheet.GetRow(0);
                    int  cellCount = firstRow.LastCellNum; //一行最后一个cell的编号 即总的列数

                    int rowCount = sheet.LastRowNum;       //最后一列的标号
                    for (int i = startRow; i <= rowCount; ++i)
                    {
                        Object entity = System.Activator.CreateInstance(entityType);
                        IRow   row    = sheet.GetRow(i);
                        if (row == null)
                        {
                            continue;              //没有数据的行默认是null       
                        }
                        foreach (MapRuleItem ruleItem in ruleItemList)
                        {
                            int j      = ruleItem.Sorting; // 获得这个ruleItem的顺序,它对应你EXCEL的位置
                            var column = ruleItem.Column;  // 获得这个列的对象化名字(对象属性名称)

                            if (row.GetCell(j) == null)    // 如果mapping有定义一个列,但EXCEL并没有这个列,要跳过
                            {
                                continue;
                            }
                            var    value = ConvertCellValue(row.GetCell(j).ToString()); // 获得EXCEL中,这个第J列的值,这里要转换值类型,比如string的要转int
                            string error = LangHelper.Get("ExcelHelper_Result_Error_ImportRowError");
                            error = string.Format(error, i);
                            if (String.IsNullOrEmpty(value.ToString()))   // 一个异常捕捉的例子
                            {
                                throw new Exception(error);
                            }

                            CommonHelper.SetObjectValue(entity, column, value); // 赋值
                        }// end foreach
                        processCount = i;                                       // 告知外部目前处理到第几条
                        dataList.Add(entity);                                   // 把它增加进数组。
                    }//end for
                }//end if

                return(dataList);
            }
            catch (Exception e)
            {
                throw new Exception("Import Fail:" + e.Message, e.InnerException);
            }
        }
Пример #2
0
        /// <summary>
        /// 导出方法,这里负责导出EXCEL
        /// </summary>
        /// <param name="dataList">需要导出的数据集合</param>
        /// <param name="ruleItemList">导出的规则</param>
        /// <returns>返回含有Excel的Memory Stream</returns>
        public static MemoryStream GetExportMemoryStream(Type entityType, List <Object> dataList, FileData fileData, out int processCount)
        {
            ICollection <MapRuleItem> ruleItemList = fileData.MapRule.RuleItemList;

            processCount = 0;
            try
            {
                MemoryStream ms = new MemoryStream();

                IWorkbook workbook = null; //Create an excel Workbook
                if (fileData.FileType == (int)FileTypeEnum.XLSX)
                {                          // 2007
                    workbook = new XSSFWorkbook();
                }

                if (fileData.FileType == (int)FileTypeEnum.XLS)
                {// 2003
                    workbook = new HSSFWorkbook();
                }

                if (fileData.FileType == (int)FileTypeEnum.CSV)
                {// csv
                 // csv 处理
                }
                ISheet sheet     = workbook.CreateSheet(); //Create a work table in the table
                IRow   headerRow = sheet.CreateRow(0);     //To add a row in the table



                // create the header
                foreach (MapRuleItem ruleItem in ruleItemList)
                {
                    String headerName = ruleItem.Name;
                    int    sorting    = ruleItem.Sorting;
                    headerRow.CreateCell(sorting).SetCellValue(headerName);
                    sheet.SetColumnWidth(sorting, 20 * 256);
                }

                // create the rows
                int rowIndex = 1;

                for (int i = 0; i < dataList.Count; i++)
                {
                    IRow dataRow = sheet.CreateRow(rowIndex);

                    foreach (MapRuleItem ruleItem in ruleItemList)
                    {
                        String columnName  = ruleItem.Column;
                        String columnValue = CommonHelper.GetObjectValue(dataList[i], columnName);
                        if (columnValue == null)
                        {
                            String errMsg = LangHelper.Get("ExcelHelper_Result_Error_ImportColumnError");
                            errMsg = string.Format(errMsg, columnName, rowIndex);
                            throw new Exception("Export Fail:" + errMsg);
                        }
                        int sorting = ruleItem.Sorting;
                        dataRow.CreateCell(sorting).SetCellValue(columnValue);
                    }
                    rowIndex++;
                    processCount = i + 1;      // 告知外部目前处理到第几条
                }
                workbook.SetSheetName(0, entityType.Name);
                workbook.Write(ms);
                //ms.Flush();
                //ms.Position = 0;

                return(ms);
            }
            catch (Exception e)
            {
                throw new Exception("Export Fail:" + e.Message, e.InnerException);
            }
        }