npoi实现数据导出Excel

• npoi

    .NET第三方的Office功能组件。

• 链接地址
• http://npoi.codeplex.com/

• 引用命名空间

using NPOI.HSSF.UserModel;

using NPOI.HPSF;

using NPOI.POIFS.FileSystem;

using NPOI.SS.UserModel;

• 功能代码

    /// <summary>

    /// 操作EXCEL导出数据报表的类

    /// </summary>

    public class DataToExcel

    {

       

        /// <summary>

        /// 以HTTP的形式创建Excel文件

        /// </summary>

        /// <param name="ds"></param>

        public static void CreateExcel(DataSet ds)

        {

            HSSFWorkbook hssfworkbook;

            string filename = DateTime.Now.ToString("yyyyMMddHHmmssff") + ".xls";

            HttpContext.Current.Response.ContentType = "application/vnd.ms-excel";

            HttpContext.Current.Response.AddHeader("Content-Disposition", string.Format("attachment;filename={0}", filename));

            HttpContext.Current.Response.Clear();

 

            InitializeWorkbook(out hssfworkbook);

            GenerateData(ref hssfworkbook, ds.Tables[0]);

 

            HttpContext.Current.Response.BinaryWrite(WriteToStream(hssfworkbook).GetBuffer());

            HttpContext.Current.Response.End();

        }

 

        /// <summary>

        /// 写入字符流

        /// </summary>

        /// <param name="hssfworkbook"></param>

        /// <returns></returns>

        private static MemoryStream WriteToStream(HSSFWorkbook hssfworkbook)

        {

            MemoryStream file = new MemoryStream();

            hssfworkbook.Write(file);

            return file;

        }

 

        /// <summary>

        /// 数据转换

        /// </summary>

        /// <param name="hssfworkbook"></param>

        private static void GenerateData(ref HSSFWorkbook hssfworkbook, DataTable dt)

        {

            ISheet sheet1 = hssfworkbook.CreateSheet("Sheet1");

 

            IRow row0 = sheet1.CreateRow(0);

            for (int z = 0; z < dt.Columns.Count; z++)

            {

                row0.CreateCell(z).SetCellValue(dt.Columns[z].ColumnName.ToString());

            }

 

            for (int i = 0; i < dt.Rows.Count; i++)

            {

                IRow row = sheet1.CreateRow(i + 1);

                for (int j = 0; j < dt.Columns.Count; j++)

                {

                    row.CreateCell(j).SetCellValue(dt.Rows[i][j].ToString());

                }

            }

        }

 

        /// <summary>

        /// 初始化工作薄

        /// </summary>

        /// <param name="hssfworkbook"></param>

        private static void InitializeWorkbook(out HSSFWorkbook hssfworkbook)

        {

            hssfworkbook = new HSSFWorkbook();

 

            DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();

            dsi.Company = "";

            hssfworkbook.DocumentSummaryInformation = dsi;

 

            SummaryInformation si = PropertySetFactory.CreateSummaryInformation();

            si.Subject = "";

            hssfworkbook.SummaryInformation = si;

        }

 

    }