MyNPOI/ExcelHelper.cs

这里只显示每个文件的开头 60 行。登录后可以解锁完整代码。

微信扫码关注公众号，代码整理好后第一时间通知你。

using System;
using System.Collections.Generic;
using System.Data;
using System.IO;
using System.Text;
using System.Web;
using NPOI;
using NPOI.HPSF;
using NPOI.HSSF;
using NPOI.HSSF.UserModel;
using NPOI.HSSF.Util;
using NPOI.POIFS;
using NPOI.Util;


public class ExcelHelper
{

    /// <summary>   
    /// DataTable导出到Excel的MemoryStream   
    /// </summary>   
    /// <param name="dtSource">源DataTable</param>   
    /// <param name="strHeaderText">表头文本</param>   
    public static MemoryStream Export(DataTable dtSource, string strHeaderText)
    {
        HSSFWorkbook workbook = new HSSFWorkbook();
        HSSFSheet sheet = workbook.CreateSheet("Sheet1");

        #region 右击文件 属性信息
        {
            DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
            dsi.Company = "http://www.yongfa365.com/";
            workbook.DocumentSummaryInformation = dsi;

            SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
            si.Author = ""; //填加xls文件作者信息   
            si.ApplicationName = "NPOI测试程序"; //填加xls文件创建程序信息   
            si.LastAuthor = ""; //填加xls文件最后保存者信息   
            si.Comments = "说明信息"; //填加xls文件作者信息   
            si.Title = "NPOI测试"; //填加xls文件标题信息   
            si.Subject = "NPOI测试Demo";//填加文件主题信息   
            si.CreateDateTime = DateTime.Now;
            workbook.SummaryInformation = si;
        }
        #endregion

        HSSFCellStyle dateStyle = workbook.CreateCellStyle();
        HSSFDataFormat format = workbook.CreateDataFormat();
        dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");

        //取得列宽   
        int[] arrColWidth = new int[dtSource.Columns.Count];
        foreach (DataColumn item in dtSource.Columns)
        {
            arrColWidth[item.Ordinal] = Encoding.GetEncoding(936).GetBytes(item.ColumnName.ToString()).Length;
        }
        for (int i = 0; i < dtSource.Rows.Count; i++)
        {
            for (int j = 0; j < dtSource.Columns.Count; j++)
            {