• NPOI将Excel中的数据导入到数据库


        using(FileStream fs=File.OpenRead(@"d:/MY.xls"))
                {
                    IWorkbook wk = new HSSFWorkbook(fs);
                    if (wk.NumberOfSheets>0)
                    {
                        ISheet sheet = wk.GetSheetAt(0);
                        for (int i = 0; i <= sheet.LastRowNum; i++)
                        {
                            IRow row = sheet.GetRow(i);
    
                            // //Id, Name, ParentID
                            //string name=row.GetCell(1).CellType==CellType.STRING.StringCellValue;
                            string Name = row.GetCell(1).StringCellValue == "null" ? null : row.GetCell(1).StringCellValue;
                            int? ParentID = row.GetCell(2) == null ? null:(int?) row.GetCell(2).NumericCellValue;
    
                            string sql = "insert into TreeView values( @Name, @ParentID)";
    
                            SqlParameter[] pms = new SqlParameter[]{
                            new SqlParameter("@Name",Name==null?DBNull.Value:(object)Name),
                            new SqlParameter("@ParentID",ParentID==null?DBNull.Value:(object)ParentID)
    
                            };
                            SqlHelper.ExecteNonQuery(System.Data.CommandType.Text, sql, pms);
                        }
                    }
                    
                }
      public class DoExcel
        {
    
    
            public static void LogeToExcel(string[] strs)
            {
                DateTime dt = DateTime.Now;
                string dir = "/ApiLogs/" + DateTime.Now.ToString("yyyy-MM-dd") + ".xls";
                string path = HttpContext.Current.Server.MapPath(dir);
                int rowNum = 0;
                if (!File.Exists(path))
                {
                    //Directory.CreateDirectory(path);
                    //创建一个workbook
                    IWorkbook wk = new HSSFWorkbook();
                    //创建sheet
                    ISheet sh = wk.CreateSheet("Sheet1");
                    IRow row = sh.CreateRow(rowNum);
                    for (int i = 0; i < strs.Length; i++)
                    {
                        ICell iCell = row.CreateCell(i);
                        iCell.SetCellValue(strs[i]);
                    }
    
                    using (FileStream fs = File.OpenWrite(path))
                    {
                        wk.Write(fs);
                    }
                }
                else
                {
                    FileStream fss = File.OpenRead(path);
                    IWorkbook wk = new HSSFWorkbook(fss);
                    int InsertRowIndex = wk.GetSheetAt(0).LastRowNum+1;
                    ExportExcelByTemple(strs, path, path, 20, InsertRowIndex);
                }
            }
    
            /// <summary>
            /// 用模板导出Excel
            /// </summary>
            /// <param name="table"></param>
            /// <param name="strFileName">导出路径</param>
            /// <param name="templetPath">模板路径</param>
            /// <param name="startRow">从第几行开始写数据,从1开始</param>
            public static void ExportExcelByTemple(string[] strs, string strFileName, string templetPath, int rowHeight, int startRow)
            {
                try
                {
                    HSSFWorkbook workbook = getWorkBook(templetPath);
                    ISheet sheet = getSheet(workbook);
                    writeData(workbook, sheet, strs, strFileName, rowHeight, startRow);
                    saveData(workbook, strFileName);
                }
                catch (Exception ex)
                {
                    throw ex;
                }
            }
    
    
            /// <summary>
            /// 解析Excel模板,返回WorkBook
            /// </summary>
            /// <param name="templetPath"></param>
            /// <returns></returns>
            private static HSSFWorkbook getWorkBook(string templetPath)
            {
                FileStream file = new FileStream(templetPath, FileMode.Open, FileAccess.Read);
                HSSFWorkbook workbook = new HSSFWorkbook(file);
                return workbook;
            }
    
            /// <summary>
            /// 返回Sheet
            /// </summary>
            /// <param name="workbook"></param>
            /// <returns></returns>
            private static ISheet getSheet(HSSFWorkbook workbook)
            {
                return workbook.GetSheetAt(0);
            }
            /// <summary>
            /// 
            /// </summary>
            /// <param name="workbook"></param>
            /// <param name="sheet"></param>
            /// <param name="dtSource"></param>
            /// <param name="strFileName"></param>
            /// <param name="rowHeight"></param>
            /// <param name="startRow"></param>
            /// <param name="size"></param>
            private static void writeData(HSSFWorkbook workbook, ISheet sheet, string[] strs, string strFileName, int rowHeight, int startRow)
            {
                // //填充表头     
                IRow dataRow = new HSSFRow();
                //填充内容    
                dataRow = sheet.CreateRow(startRow);
                dataRow.Height = (short)(rowHeight * 20);
                for (int j = 0; j < strs.Length; j++)
                {
                    string drValue = strs[j];
                    dataRow.CreateCell(j).SetCellValue(drValue);
                }
            }
            /// <summary>
            /// 保存数据
            /// </summary>
            /// <param name="workbook"></param>
            /// <param name="strFileName"></param>
            private static void saveData(HSSFWorkbook workbook, string strFileName)
            {
                //保存     
                using (MemoryStream ms = new MemoryStream())
                {
                    using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
                    {
                        workbook.Write(fs);
                    }
                }
            }
        }
    向已有的Excel中添加一条信息

      

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  • 原文地址:https://www.cnblogs.com/taidi/p/3896192.html
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