NPOI的使用Excel模板導出 可插入到指定行

Excel模版建議把需要添加數據行的樣式設置好

模版樣式，導出后效果

 

【2017-11-22　　對獲取需插入數據的首行樣式有時為空報錯修改】

        /// <summary>
        /// 根據模版導出Excel
        /// </summary>
        /// <param name="templateFile">模版路徑（包含后綴）  例："~/Template/Exceltest.xls"</param>
        /// <param name="strFileName">文件名稱（不包含后綴）  例："Excel測試"</param>
        /// <param name="source">源DataTable</param>
        /// <param name="cellKes">需要導出的對應的列字段  例：string[] cellKes = { "Date","Remarks" };</param>
        /// <param name="rowIndex">從第幾行開始創建數據行,第一行為0</param>
        /// <returns>是否導出成功</returns>
        public static string ExportScMeeting(string templateFile, string strFileName, DataTable source, string[] cellKes, int rowIndex)
        {
            templateFile = HttpContext.Current.Server.MapPath(templateFile);
            int cellCount = cellKes.Length;//總列數，第一列為0
            IWorkbook workbook = null;
            try
            {
                using (FileStream file = new FileStream(templateFile, FileMode.Open, FileAccess.Read))
                {
                    if (Path.GetExtension(templateFile) == ".xls")
                        workbook = new HSSFWorkbook(file);
                    else if (Path.GetExtension(templateFile) == ".xlsx")
                        workbook = new XSSFWorkbook(file);
                }
                ISheet sheet = workbook.GetSheetAt(0);
                if (sheet != null && source != null && source.Rows.Count > 0)
                {
                    IRow row; ICell cell;
                    //獲取需插入數據的首行樣式
                    IRow styleRow = sheet.GetRow(rowIndex);
                    if (styleRow == null)
                    {
                        for (int i = 0, len = source.Rows.Count; i < len; i++)
                        {
                            row = sheet.CreateRow(rowIndex);
                            //創建列並插入數據
                            for (int index = 0; index < cellCount; index++)
                            {
                                row.CreateCell(index)
                                    .SetCellValue(!(source.Rows[i][cellKes[index]] is DBNull) ? source.Rows[i][cellKes[index]].ToString() : string.Empty);
                            }
                            rowIndex++;
                        }
                    }
                    else
                    {
                        for (int i = 0, len = source.Rows.Count; i < len; i++)
                        {
                            row = sheet.CreateRow(rowIndex);
                            row.HeightInPoints = styleRow.HeightInPoints;
                            row.Height = styleRow.Height;
                            //創建列並插入數據
                            for (int index = 0; index < cellCount; index++)
                            {
                                cell = row.CreateCell(index, styleRow.GetCell(index).CellType);
                                cell.CellStyle = styleRow.GetCell(index).CellStyle;
                                cell.SetCellValue(!(source.Rows[i][cellKes[index]] is DBNull) ? source.Rows[i][cellKes[index]].ToString() : string.Empty);
                            }
                            rowIndex++;
                        }
                    }
                }
                return NPOIExport(strFileName + "." + templateFile.Split('.')[templateFile.Split('.').Length - 1], workbook);
            }
            catch (Exception ex)
            {
                return ex.Message;
            }

        }

 

附屬方法

        public static string NPOIExport(string fileName, IWorkbook workbook)
        {
            try
            {
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                workbook.Write(ms);

                HttpContext.Current.Response.Clear();
                HttpContext.Current.Response.ClearHeaders();
                HttpContext.Current.Response.Cache.SetCacheability(System.Web.HttpCacheability.Private);
                HttpContext.Current.Response.Buffer = true;
                HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF8;
                HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment; filename={0}", fileName));
                HttpContext.Current.Response.ContentType = "application/ms-excel";
                HttpContext.Current.Response.BinaryWrite(ms.ToArray());
                HttpContext.Current.Response.Flush();
                HttpContext.Current.Response.End();
                ms.Close();
                ms.Dispose();
                return "導出成功";
            }
            catch (Exception ex)
            {
                return "導出失敗";
            }
        }

 

調用方法

    
    /// <summary>
    /// 后台調用方法
    /// </summary>
    /// <returns></returns>
    public string Exc()
    {
        return ExcelUtil.ExportScMeeting("~/Template/MonthlyRepair.xls", "ExcelName", new DataTable(), new string[2] { "name1", "name2" }, 0);
    }

    //前台js調用 window.open('@Url.Action("Exc")');

 

注：需要在指定行插入數據的話請使用NPOI自帶的方法對Excel進行操作

sheet.ShiftRows(0/*開始行*/, sheet.LastRowNum/*結束行*/, 10/*插入總行數，移動大小(行數)--往下移動*/, true/*是否復制行高*/, false/*是否重置行高*/);

 示例方法代碼

    /// <summary>
    /// 根據模版導出Excel
    /// </summary>
    /// <param name="templateFile">模版路徑（包含后綴）  例："~/Template/Exceltest.xls"</param>
    /// <param name="strFileName">文件名稱（不包含后綴）  例："Excel測試"</param>
    /// <param name="isCover">是否向下覆蓋，不覆蓋則在rowIndex行插入數據</param>
    /// <param name="source">源DataTable</param>
    /// <param name="cellKes">需要導出的對應的列字段  例：string[] cellKes = { "Date","Remarks" };</param>
    /// <param name="rowIndex">從第幾行開始創建數據行,第一行為0</param>
    /// <returns>是否導出成功</returns>
    public static string ExportScMeeting(string templateFile, string strFileName, bool isCover, DataTable source, string[] cellKes, int rowIndex)
    {
        templateFile = HttpContext.Current.Server.MapPath(templateFile);
        int cellCount = cellKes.Length;//總列數，第一列為0
        IWorkbook workbook = null;
        try
        {
            using (FileStream file = new FileStream(templateFile, FileMode.Open, FileAccess.Read))
            {
                workbook = new HSSFWorkbook(file);
            }
            ISheet sheet = workbook.GetSheetAt(0);
            if (sheet != null && source != null && source.Rows.Count > 0)
            {
                IRow row;
                //是否向下覆蓋
                if (!isCover) sheet.ShiftRows(rowIndex, sheet.LastRowNum, source.Rows.Count, true, false);
                //獲取需插入數據的首行樣式
                IRow styleRow = sheet.GetRow(isCover ? rowIndex : (rowIndex + source.Rows.Count));
                for (int i = 0, len = source.Rows.Count; i < len; i++)
                {
                    row = sheet.CreateRow(rowIndex);
                    //創建列並插入數據
                    for (int index = 0; index < cellCount; index++)
                    {
                        row.CreateCell(index)
                            .SetCellValue(!(source.Rows[i][cellKes[index]] is DBNull) ? source.Rows[i][cellKes[index]].ToString() : string.Empty);
                    }
                    rowIndex++;
                }
            }
            return NPOIExport(strFileName + ".xls", workbook);
        }
        catch (Exception ex)
        {
            return ex.Message;
        }
    }