C#Excl表格的导入功能

Posted 2021-12-22 namexiaoqi

1,添加NOPI的引用

下载地址:http://download-codeplex.sec.s-msft.com/Download/Release?ProjectName=npoi&DownloadId=1432518&FileTime=130691232697500000&Build=21066

2,添加命名空间

using NPOI.HSSF.UserModel;
using NPOI.SS.UserModel;
using NPOI.XSSF.UserModel;

/// <summary>
        /// 导入
       /// </summary>
       /// <returns></returns>
        public ActionResult ImportExcel()
        
            Dictionary<String, Object> result = new Dictionary<String, Object>();
            StringBuilder errorMsg = new StringBuilder(); // 错误信息
            try
            
                string tempFile = Server.MapPath("~/ExcelFiles/");//路径
                string repath = Request["repath"];

                //将Excel文件上传到本地服务器              
                HttpPostedFileBase uploadFile = Request.Files[repath];// 获取上传的文件                
                var filePath = string.Format("01", tempFile, uploadFile.FileName); // 上传服务器的文件保存路径
                uploadFile.SaveAs(filePath);//保存文件

                ////Excel文档流转换成DataTable               
                DataTable dt = ExcelToDataTable(filePath, true);
               
                // 将数据存储到数据库
                AidMeasureService.ExcelDataSave(dt);

                //将上传的文件删除
                System.IO.FileInfo nfile = new System.IO.FileInfo(filePath);
                if (nfile.Exists)
                
                    nfile.Delete();
                
            
            catch (Exception ex)
            
                LogHelper.WriteLog("MeasureController.ImportExcel()", ex);
                result.Add("Success", false);
                result.Add("ErrorInfo", ex.ToString());
                return Json(result);
            
            result.Add("Success", true);
            return Json(result);
        
      
        /// <summary>  
        /// 将excel导入到datatable  
        /// </summary>  
        /// <param name="filePath">excel路径</param>  
        /// <param name="isColumnName">第一行是否是列名</param>  
        /// <returns>返回datatable</returns>  
        public DataTable ExcelToDataTable(string filePath, bool isColumnName)
        
            DataTable dataTable = null;
            FileStream fs = null;
            DataColumn column = null;
            DataRow dataRow = null;
            IWorkbook workbook = null;
            ISheet sheet = null;
            IRow row = null;
            ICell cell = null;
            int startRow = 0;
            try
            
                using (FileStream stream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
                
                    // 2007版本  
                    if (filePath.IndexOf(".xlsx") > 0)
                        workbook = new XSSFWorkbook(stream);
                    // 2003版本  
                    else if (filePath.IndexOf(".xls") > 0)
                        workbook = new HSSFWorkbook(stream);

                    if (workbook != null)
                    
                        sheet = workbook.GetSheetAt(0);//读取第一个sheet，当然也可以循环读取每个sheet  
                        dataTable = new DataTable();
                        if (sheet != null)
                        
                            int rowCount = sheet.LastRowNum;//总行数  
                            if (rowCount > 0)
                            
                                IRow firstRow = sheet.GetRow(0);//第一行  
                                int cellCount = firstRow.LastCellNum;//列数  

                                //构建datatable的列  
                                if (isColumnName)
                                
                                    startRow = 1;//如果第一行是列名，则从第二行开始读取  
                                    for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
                                    
                                        cell = firstRow.GetCell(i);
                                        if (cell != null)
                                        
                                            if (cell.StringCellValue != null)
                                            
                                                column = new DataColumn(cell.StringCellValue);
                                                dataTable.Columns.Add(column);
                                            
                                        
                                    
                                
                                else
                                
                                    for (int i = firstRow.FirstCellNum; i < cellCount; ++i)
                                    
                                        column = new DataColumn("column" + (i + 1));
                                        dataTable.Columns.Add(column);
                                    
                                

                                //填充行  
                                for (int i = startRow; i <= rowCount; ++i)
                                
                                    row = sheet.GetRow(i);
                                    if (row == null) continue;

                                    dataRow = dataTable.NewRow();
                                    for (int j = row.FirstCellNum; j < cellCount; ++j)
                                    
                                        cell = row.GetCell(j);
                                        if (cell == null)
                                        
                                            dataRow[j] = "";
                                        
                                        else
                                        
                                            //CellType(Unknown = -1,Numeric = 0,String = 1,Formula = 2,Blank = 3,Boolean = 4,Error = 5,)  
                                            switch (cell.CellType)
                                            
                                                case CellType.BLANK:
                                                    dataRow[j] = "";
                                                    break;
                                                case CellType.NUMERIC:
                                                    short format = cell.CellStyle.DataFormat;
                                                    //对时间格式（2015.12.5、2015/12/5、2015-12-5等）的处理  
                                                    if (format == 14 || format == 31 || format == 57 || format == 58)
                                                        dataRow[j] = cell.DateCellValue;
                                                    else
                                                        dataRow[j] = cell.NumericCellValue;
                                                    break;
                                                case CellType.STRING:
                                                    dataRow[j] = cell.StringCellValue;
                                                    break;
                                            
                                        
                                    
                                    dataTable.Rows.Add(dataRow);
                                
                            
                        
                    
                
                return dataTable;
            
            catch (Exception)
            
                if (fs != null)
                
                    fs.Close();
                
                return null;