RMYY_CallCenter_Api/RMYY_CallCen.../Helper/NPOIHelper.cs


using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Linq;
using System.Text;
using System.Web;
using NPOI.HSSF.UserModel;
using NPOI.OpenXmlFormats.Wordprocessing;
using NPOI.SS.UserModel;
using NPOI.SS.Util;
using NPOI.XSSF.UserModel;

namespace RMYY_CallCenter_Api.Utility
{
    public class NPOIHelper
    {

        /// <summary>
        /// 弹出下载框导出excel
        /// </summary>
        /// <param name="Name"></param>
        /// <param name="dt"></param>
        /// <returns></returns>
        public string ExportToExcel2(string Name, DataTable dt, string[] cols = null)
        {
            try
            {
                //if (dt.Rows.Count > 0)
                //{
                HSSFWorkbook workbook = new HSSFWorkbook();
                ISheet sheet = workbook.CreateSheet(Name);

                ICellStyle HeadercellStyle = workbook.CreateCellStyle();
                HeadercellStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
                HeadercellStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
                HeadercellStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
                HeadercellStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;
                HeadercellStyle.Alignment = HorizontalAlignment.Center;
                HeadercellStyle.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.SkyBlue.Index;
                HeadercellStyle.FillPattern = FillPattern.SolidForeground;
                HeadercellStyle.FillBackgroundColor = NPOI.HSSF.Util.HSSFColor.SkyBlue.Index;

                //字体
                NPOI.SS.UserModel.IFont headerfont = workbook.CreateFont();
                headerfont.Boldweight = (short)FontBoldWeight.Bold;
                headerfont.FontHeightInPoints = 12;
                HeadercellStyle.SetFont(headerfont);


                //用column name 作为列名
                int icolIndex = 0;
                IRow headerRow = sheet.CreateRow(0);

                if (cols == null || (cols != null && cols.Length == 0))
                {
                    foreach (DataColumn dc in dt.Columns)
                    {
                        ICell cell = headerRow.CreateCell(icolIndex);
                        cell.SetCellValue(dc.ColumnName);
                        cell.CellStyle = HeadercellStyle;
                        icolIndex++;
                    }
                }
                else
                {
                    foreach (string dc in cols)
                    {
                        ICell cell = headerRow.CreateCell(icolIndex);
                        cell.SetCellValue(dc);
                        cell.CellStyle = HeadercellStyle;
                        icolIndex++;
                    }
                }
                ICellStyle cellStyle = workbook.CreateCellStyle();

                //为避免日期格式被Excel自动替换，所以设定 format 为 『@』 表示一率当成text來看
                cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("@");
                cellStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
                cellStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
                cellStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
                cellStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;


                NPOI.SS.UserModel.IFont cellfont = workbook.CreateFont();
                cellfont.Boldweight = (short)FontBoldWeight.Normal;
                cellStyle.SetFont(cellfont);

                //建立内容行
                int iRowIndex = 0;
                foreach (DataRow dr in dt.Rows)
                {
                    int iCellIndex = 0;
                    IRow irow = sheet.CreateRow(iRowIndex + 1);

                    for (int i = 0; i < dt.Columns.Count; i++)
                    {
                        string strsj = string.Empty;
                        if (dr[i] != null)
                        {
                            strsj = dr[i].ToString();
                        }
                        ICell cell = irow.CreateCell(iCellIndex);
                        cell.SetCellValue(strsj);
                        cell.CellStyle = cellStyle;
                        iCellIndex++;
                    }
                    iRowIndex++;
                }

                //自适应列宽度
                for (int i = 0; i < icolIndex; i++)
                {
                    sheet.AutoSizeColumn(i);
                }

                using (MemoryStream ms = new MemoryStream())
                {
                    workbook.Write(ms);

                    HttpContext curContext = HttpContext.Current;


                    // 设置编码和附件格式
                    curContext.Response.ContentType = "application/vnd.ms-excel";
                    curContext.Response.ContentEncoding = Encoding.UTF8;
                    curContext.Response.Charset = "";
                    curContext.Response.AppendHeader("Access-Control-Expose-Headers", "Content-Disposition");
                    curContext.Response.AppendHeader("Content-Disposition",
                        "attachment;filename=" + HttpUtility.UrlEncode(Name + "_导出文件_" + DateTime.Now.Ticks + ".xls", Encoding.UTF8));

                    curContext.Response.BinaryWrite(ms.GetBuffer());

                    workbook = null;
                    ms.Close();
                    ms.Dispose();

                    curContext.Response.End();
                }
                //}
                return "";
            }
            catch
            {
                return "导出失败！";
            }
        }


        /// <summary>
        /// 弹出下载框导出excel
        /// </summary>
        /// <param name="Name"></param>
        /// <param name="dt"></param>
        /// <returns></returns>
        public string ExportToExcel(string Name, DataTable dt, string[] cols = null, int issort = 0)
        {
            try
            {
                //if (dt.Rows.Count > 0)
                //{
                HSSFWorkbook workbook = new HSSFWorkbook();
                ISheet sheet = workbook.CreateSheet(Name);

                ICellStyle HeadercellStyle = workbook.CreateCellStyle();
                HeadercellStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
                HeadercellStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
                HeadercellStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
                HeadercellStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;
                HeadercellStyle.Alignment = HorizontalAlignment.Center;
                HeadercellStyle.FillForegroundColor = NPOI.HSSF.Util.HSSFColor.SkyBlue.Index;
                HeadercellStyle.FillPattern = FillPattern.SolidForeground;
                HeadercellStyle.FillBackgroundColor = NPOI.HSSF.Util.HSSFColor.SkyBlue.Index;

                //字体
                NPOI.SS.UserModel.IFont headerfont = workbook.CreateFont();
                headerfont.Boldweight = (short)FontBoldWeight.Bold;
                headerfont.FontHeightInPoints = 12;
                HeadercellStyle.SetFont(headerfont);


                //用column name 作为列名
                int icolIndex = 0;
                IRow headerRow = sheet.CreateRow(0);

                if (issort == 1)
                {
                    ICell cell = headerRow.CreateCell(icolIndex);
                    cell.SetCellValue("序号");
                    cell.CellStyle = HeadercellStyle;
                    icolIndex++;
                }

                if (cols == null || (cols != null && cols.Length == 0))
                {
                    foreach (DataColumn dc in dt.Columns)
                    {
                        ICell cell = headerRow.CreateCell(icolIndex);
                        cell.SetCellValue(dc.ColumnName);
                        cell.CellStyle = HeadercellStyle;
                        icolIndex++;
                    }
                }
                else
                {
                    foreach (string dc in cols)
                    {
                        ICell cell = headerRow.CreateCell(icolIndex);
                        cell.SetCellValue(dc);
                        cell.CellStyle = HeadercellStyle;
                        icolIndex++;
                    }
                }
                ICellStyle cellStyle = workbook.CreateCellStyle();

                //为避免日期格式被Excel自动替换，所以设定 format 为 『@』 表示一率当成text來看
                cellStyle.DataFormat = HSSFDataFormat.GetBuiltinFormat("@");
                cellStyle.BorderBottom = NPOI.SS.UserModel.BorderStyle.Thin;
                cellStyle.BorderLeft = NPOI.SS.UserModel.BorderStyle.Thin;
                cellStyle.BorderRight = NPOI.SS.UserModel.BorderStyle.Thin;
                cellStyle.BorderTop = NPOI.SS.UserModel.BorderStyle.Thin;


                NPOI.SS.UserModel.IFont cellfont = workbook.CreateFont();
                cellfont.Boldweight = (short)FontBoldWeight.Normal;
                cellStyle.SetFont(cellfont);

                //建立内容行
                int iRowIndex = 0;
                foreach (DataRow dr in dt.Rows)
                {
                    int iCellIndex = 0;
                    IRow irow = sheet.CreateRow(iRowIndex + 1);

                    if (issort == 1)
                    {
                        ICell cell = irow.CreateCell(iCellIndex);
                        cell.SetCellValue(iRowIndex + 1);
                        cell.CellStyle = cellStyle;
                        iCellIndex++;
                    }
                    for (int i = 0; i < dt.Columns.Count; i++)
                    {
                        string strsj = string.Empty;
                        if (dr[i] != null)
                        {
                            strsj = dr[i].ToString();
                        }
                        ICell cell = irow.CreateCell(iCellIndex);
                        cell.SetCellValue(strsj);
                        cell.CellStyle = cellStyle;
                        iCellIndex++;
                    }
                    iRowIndex++;
                }

                //自适应列宽度
                for (int i = 0; i < icolIndex; i++)
                {
                    sheet.AutoSizeColumn(i);
                }

                using (MemoryStream ms = new MemoryStream())
                {
                    workbook.Write(ms);

                    HttpContext curContext = HttpContext.Current;


                    // 设置编码和附件格式
                    curContext.Response.ContentType = "application/vnd.ms-excel"; //指定返回的是一个不能被客户端读取的流，必须被下载
                    curContext.Response.ContentEncoding = Encoding.UTF8;
                    curContext.Response.Charset = "";
                    curContext.Response.AppendHeader("Access-Control-Expose-Headers", "Content-Disposition");
                    curContext.Response.AppendHeader("Content-Disposition",
                        "attachment;filename=" + HttpUtility.UrlEncode(Name + "_导出文件_" + DateTime.Now.Ticks + ".xls", Encoding.UTF8));

                    curContext.Response.BinaryWrite(ms.GetBuffer());

                    workbook = null;
                    ms.Close();
                    ms.Dispose();

                    curContext.Response.End();
                }
                //}
                return "";
            }
            catch
            {
                return "导出失败！";
            }
        }


        /// <summary>
        /// 导入excel转换为datatable
        /// </summary>
        /// <param name="upfile"></param>
        /// <param name="headrow"></param>
        /// <returns></returns>
        public DataTable ExcelToTable(HttpPostedFileBase upfile, int headrow)
        {
            DataTable dt = new DataTable();

            IWorkbook workbook = null;

            Stream stream = upfile.InputStream;

            string suffix = upfile.FileName.Substring(upfile.FileName.LastIndexOf(".") + 1).ToLower();
            if (suffix == "xlsx") // 2007版本
            {
                workbook = new XSSFWorkbook(stream);
            }
            else if (suffix == "xls") // 2003版本
            {
                workbook = new HSSFWorkbook(stream);
            }

            //获取excel的第一个sheet
            ISheet sheet = workbook.GetSheetAt(0);

            //获取sheet的第一行
            IRow headerRow = sheet.GetRow(headrow);

            //一行最后一个方格的编号 即总的列数
            int cellCount = headerRow.LastCellNum;
            //最后一列的标号  即总的行数
            int rowCount = sheet.LastRowNum;
            //列名
            for (int i = 0; i < cellCount; i++)
            {
                dt.Columns.Add(headerRow.GetCell(i).ToString());
            }

            for (int i = (sheet.FirstRowNum + headrow + 1); i <= sheet.LastRowNum; i++)
            {
                DataRow dr = dt.NewRow();

                IRow row = sheet.GetRow(i);
                for (int j = row.FirstCellNum; j < cellCount; j++)
                {
                    if (row.GetCell(j) != null)
                    {
                        dr[j] = row.GetCell(j).ToString();
                    }
                }

                dt.Rows.Add(dr);
            }

            sheet = null;
            workbook = null;

            return dt;
        }


    }
}