C#Excl表格的导入功能

缺乏、安全感 2021-12-03 03:19 255阅读 0赞

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("{0}{1}", 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;
                }
            }

转载于:https://www.cnblogs.com/namexiaoqi/p/8005805.html