nopi导出

1、NPOI官方网站：http://npoi.codeplex.com/

可以到此网站上去下载最新的NPOI组件版本

2、NPOI在线学习教程（中文版）：

http://www.cnblogs.com/tonyqus/archive/2009/04/12/1434209.html

感谢Tony Qu分享出NPOI组件的使用方法

3、.NET调用NPOI组件导入导出Excel的操作类
　　此NPOI操作类的优点如下：
   （1）支持web及winform从DataTable导出到Excel；
   （2）生成速度很快；
   （3）准确判断数据类型，不会出现身份证转数值等问题；
   （4）如果单页条数大于65535时会新建工作表；
   （5）列宽自适应；

NPOI操作类 

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->  1 using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.HtmlControls;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.IO;

using System.Text;

using NPOI;

using NPOI.HPSF;

using NPOI.HSSF;

using NPOI.HSSF.UserModel;

using NPOI.HSSF.Util;

using NPOI.POIFS;

using NPOI.Util;

namespace PMS.Common

{

    public class NPOIHelper

    {

        /// <summary>

        /// DataTable导出到Excel文件

        /// </summary>

        /// <param name="dtSource">源DataTable</param>

        /// <param name="strHeaderText">表头文本</param>

        /// <param name="strFileName">保存位置</param>

        public static void Export(DataTable dtSource, string strHeaderText, string strFileName)

        {

            using (MemoryStream ms = Export(dtSource, strHeaderText))

            {

                using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))

                {

                    byte[] data = ms.ToArray();

                    fs.Write(data, , data.Length);

                    fs.Flush();

                }

            }

        }

        /// <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();

            #region 右击文件 属性信息

            {

                DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();

                dsi.Company = "NPOI";

                workbook.DocumentSummaryInformation = dsi;

                SummaryInformation si = PropertySetFactory.CreateSummaryInformation();

                si.Author = "文件作者信息"; //填加xls文件作者信息

                si.ApplicationName = "创建程序信息"; //填加xls文件创建程序信息

                si.LastAuthor = "最后保存者信息"; //填加xls文件最后保存者信息

                si.Comments = "作者信息"; //填加xls文件作者信息

                si.Title = "标题信息"; //填加xls文件标题信息

                si.Subject = "主题信息";//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().GetBytes(item.ColumnName.ToString()).Length;

            }

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

            {

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

                {

                    int intTemp = Encoding.GetEncoding().GetBytes(dtSource.Rows[i][j].ToString()).Length;

                    if (intTemp > arrColWidth[j])

                    {

                        arrColWidth[j] = intTemp;

                    }

                }

            }

            int rowIndex = ;

            foreach (DataRow row in dtSource.Rows)

            {

                #region 新建表，填充表头，填充列头，样式

                if (rowIndex ==  || rowIndex == )

                {

                    if (rowIndex != )

                    {

                        sheet = workbook.CreateSheet();

                    }

                    #region 表头及样式

                    {

                        HSSFRow headerRow = sheet.CreateRow();

                        headerRow.HeightInPoints = ;

                        headerRow.CreateCell().SetCellValue(strHeaderText);

                        HSSFCellStyle headStyle = workbook.CreateCellStyle();

                        headStyle.Alignment = CellHorizontalAlignment.CENTER;

                        HSSFFont font = workbook.CreateFont();

                        font.FontHeightInPoints = ;

                        font.Boldweight = ;

                        headStyle.SetFont(font);

                        headerRow.GetCell().CellStyle = headStyle;

                        sheet.AddMergedRegion(new Region(, , , dtSource.Columns.Count - ));

                        headerRow.Dispose();

                    }

                    #endregion

                    #region 列头及样式

                    {

                        HSSFRow headerRow = sheet.CreateRow();

                        HSSFCellStyle headStyle = workbook.CreateCellStyle();

                        headStyle.Alignment = CellHorizontalAlignment.CENTER;

                        HSSFFont font = workbook.CreateFont();

                        font.FontHeightInPoints = ;

                        font.Boldweight = ;

                        headStyle.SetFont(font);

                        foreach (DataColumn column in dtSource.Columns)

                        {

                            headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);

                            headerRow.GetCell(column.Ordinal).CellStyle = headStyle;

                            //设置列宽

                            sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + ) * );

                        }

                        headerRow.Dispose();

                    }

                    #endregion

                    rowIndex = ;

                }

                #endregion

                #region 填充内容

                HSSFRow dataRow = sheet.CreateRow(rowIndex);

                foreach (DataColumn column in dtSource.Columns)

                {

                    HSSFCell newCell = dataRow.CreateCell(column.Ordinal);

                    string drValue = row[column].ToString();

                    switch (column.DataType.ToString())

                    {

                        case "System.String"://字符串类型

                            newCell.SetCellValue(drValue);

                            break;

                        case "System.DateTime"://日期类型

                            DateTime dateV;

                            DateTime.TryParse(drValue, out dateV);

                            newCell.SetCellValue(dateV);

                            newCell.CellStyle = dateStyle;//格式化显示

                            break;

                        case "System.Boolean"://布尔型

                            bool boolV = false;

                            bool.TryParse(drValue, out boolV);

                            newCell.SetCellValue(boolV);

                            break;

                        case "System.Int16"://整型

                        case "System.Int32":

                        case "System.Int64":

                        case "System.Byte":

                            int intV = ;

                            int.TryParse(drValue, out intV);

                            newCell.SetCellValue(intV);

                            break;

                        case "System.Decimal"://浮点型

                        case "System.Double":

                            double doubV = ;

                            double.TryParse(drValue, out doubV);

                            newCell.SetCellValue(doubV);

                            break;

                        case "System.DBNull"://空值处理

                            newCell.SetCellValue("");

                            break;

                        default:

                            newCell.SetCellValue("");

                            break;

                    }

                }

                #endregion

                rowIndex++;

            }

            using (MemoryStream ms = new MemoryStream())

            {

                workbook.Write(ms);

                ms.Flush();

                ms.Position = ;

                sheet.Dispose();

                //workbook.Dispose();//一般只用写这一个就OK了，他会遍历并释放所有资源，但当前版本有问题所以只释放sheet

                return ms;

            }

        }

        /// <summary>

        /// 用于Web导出

        /// </summary>

        /// <param name="dtSource">源DataTable</param>

        /// <param name="strHeaderText">表头文本</param>

        /// <param name="strFileName">文件名</param>

        public static void ExportByWeb(DataTable dtSource, string strHeaderText, string strFileName)

        {

            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("Content-Disposition",

                "attachment;filename=" + HttpUtility.UrlEncode(strFileName, Encoding.UTF8));

            curContext.Response.BinaryWrite(Export(dtSource, strHeaderText).GetBuffer());

            curContext.Response.End();

        } 

        /// <summary>读取excel

        /// 默认第一行为标头

        /// </summary>

        /// <param name="strFileName">excel文档路径</param>

        /// <returns></returns>

        public static DataTable Import(string strFileName)

        {

            DataTable dt = new DataTable();

            HSSFWorkbook hssfworkbook;

            using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))

            {

                hssfworkbook = new HSSFWorkbook(file);

            }

            HSSFSheet sheet = hssfworkbook.GetSheetAt();

            System.Collections.IEnumerator rows = sheet.GetRowEnumerator();

            HSSFRow headerRow = sheet.GetRow();

            int cellCount = headerRow.LastCellNum;

            for (int j = ; j < cellCount; j++)

            {

                HSSFCell cell = headerRow.GetCell(j);

                dt.Columns.Add(cell.ToString());

            }

            for (int i = (sheet.FirstRowNum + ); i <= sheet.LastRowNum; i++)

            {

                HSSFRow row = sheet.GetRow(i);

                DataRow dataRow = dt.NewRow();

                for (int j = row.FirstCellNum; j < cellCount; j++)

                {

                    if (row.GetCell(j) != null)

                        dataRow[j] = row.GetCell(j).ToString();

                }

                dt.Rows.Add(dataRow);

            }

            return dt;

        }

    }

}

参考1

public void Export()

        {

            string filename = Request["searchString"];

            Response.Clear();

            Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";

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

            NPOI.XSSF.UserModel.XSSFWorkbook workbook = new NPOI.XSSF.UserModel.XSSFWorkbook();

            NPOI.SS.UserModel.ISheet sheet1 = workbook.CreateSheet("BOM详情");

            //给sheet1添加第一行的头部标题

            NPOI.SS.UserModel.IRow row1 = sheet1.CreateRow();

            row1.CreateCell().SetCellValue("物料编码");

            row1.CreateCell().SetCellValue("物料名称");

            row1.CreateCell().SetCellValue("规格型号");

            row1.CreateCell().SetCellValue("物料用量");

            row1.CreateCell().SetCellValue("用量单位");

            row1.CreateCell().SetCellValue("备注");

            //将数据逐步写入sheet1各个行

            List<AkBom> pageResult = _akBomRepository.GetPageList(, , Request["searchString"], "");

            for (int i = ; i < pageResult.Count; i++)

            {

                NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + );

                rowtemp.CreateCell().SetCellValue(pageResult[i].ChildNumber);

                rowtemp.CreateCell().SetCellValue(pageResult[i].ChildName);

                rowtemp.CreateCell().SetCellValue(pageResult[i].Spec);

                rowtemp.CreateCell().SetCellValue(double.Parse(pageResult[i].MaterialSum.ToString()));

                rowtemp.CreateCell().SetCellValue(pageResult[i].Unit);

                rowtemp.CreateCell().SetCellValue(pageResult[i].Remark);

            }

            //写入到客户端

            System.IO.MemoryStream ms = new System.IO.MemoryStream();

            workbook.Write(ms);

            Response.BinaryWrite(ms.ToArray());

            Response.Flush();

            Response.End();

        }

参考3

public void Export()

        {

            string searchString = Request["searchString"];

            string line = Request["line"];

            string station = Request["station"];

            string begin = Request["begin"];

            string end = Request["end"];

            Response.Clear();

            Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";

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

            NPOI.XSSF.UserModel.XSSFWorkbook workbook = new NPOI.XSSF.UserModel.XSSFWorkbook();

            NPOI.SS.UserModel.ISheet sheet1 = workbook.CreateSheet("FQC");

            //excel格式化

            NPOI.SS.UserModel.ICellStyle dateStyle = workbook.CreateCellStyle();

            dateStyle.DataFormat = workbook.CreateDataFormat().GetFormat("yyyy/m/d h:mm:ss");

            NPOI.SS.UserModel.ICellStyle numberStyle = workbook.CreateCellStyle();

            numberStyle.DataFormat = workbook.CreateDataFormat().GetFormat("0.00000");

            NPOI.SS.UserModel.ICellStyle textStyle = workbook.CreateCellStyle();

            textStyle.DataFormat = workbook.CreateDataFormat().GetFormat("@");

            //给sheet1添加第一行的头部标题

            NPOI.SS.UserModel.IRow row1 = sheet1.CreateRow();

            row1.CreateCell().SetCellValue("订单号");

            row1.CreateCell().SetCellValue("条码");

            row1.CreateCell().SetCellValue("档位名称");

            row1.CreateCell().SetCellValue("Pmax");

            row1.CreateCell().SetCellValue("功率档");

            row1.CreateCell().SetCellValue("功率档范围");

            row1.CreateCell().SetCellValue("Ipm");

            row1.CreateCell().SetCellValue("电流档");

            row1.CreateCell().SetCellValue("电流档范围");

            row1.CreateCell().SetCellValue("规格");

            row1.CreateCell().SetCellValue("产品等级");

            row1.CreateCell().SetCellValue("电池片等级");

            row1.CreateCell().SetCellValue("FQC不良");

            row1.CreateCell().SetCellValue("判定结果");

            row1.CreateCell().SetCellValue("人员");

            row1.CreateCell().SetCellValue("线别");

            row1.CreateCell().SetCellValue("工位");

            row1.CreateCell().SetCellValue("备注");

            row1.CreateCell().SetCellValue("扫描时间");

            row1.CreateCell().SetCellValue("输入时间");

            row1.CreateCell().SetCellValue("Eff");

            row1.CreateCell().SetCellValue("Isc");

            row1.CreateCell().SetCellValue("Voc");

            row1.CreateCell().SetCellValue("Rs");

            row1.CreateCell().SetCellValue("Rsh");

            row1.CreateCell().SetCellValue("Vpm");

            row1.CreateCell().SetCellValue("FF");

            row1.CreateCell().SetCellValue("Sun");

            row1.CreateCell().SetCellValue("Temp");

            row1.CreateCell().SetCellValue("Class");

            //将数据逐步写入sheet1各个行

            string strSql = "where AkFqc.BarCode like '%@param%' and (AkFqc.DateTime between '@begin' and '@end') and AkFqc.LineTitle like '%@line%' and AkFqc.StationTitle like '%@station%'";

            strSql = strSql.Replace("@param", searchString);

            strSql = strSql.Replace("@begin", begin);

            strSql = strSql.Replace("@end", end);

            strSql = strSql.Replace("@line", line);

            strSql = strSql.Replace("@station", station);

            List<AkFqc> pageResult = _akFqcRepository.GetPageList(, , strSql, "order by AkFqc.Id desc");

            for (int i = ; i < pageResult.Count; i++)

            {

                NPOI.SS.UserModel.IRow rowtemp = sheet1.CreateRow(i + );

                rowtemp.CreateCell().SetCellValue(pageResult[i].OrderNumber);

                rowtemp.CreateCell().SetCellValue(pageResult[i].BarCode);

                rowtemp.CreateCell().SetCellValue(pageResult[i].Title);

                rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Pmax)));

                rowtemp.CreateCell().SetCellValue(pageResult[i].PTitle);

                rowtemp.CreateCell().SetCellValue(pageResult[i].PScope);

                rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Ipm)));

                rowtemp.CreateCell().SetCellValue(pageResult[i].ITitle);

                rowtemp.CreateCell().SetCellValue(pageResult[i].IScope);

                rowtemp.CreateCell().SetCellValue(pageResult[i].Spec);

                rowtemp.CreateCell().SetCellValue(pageResult[i].ProductLevel);

                rowtemp.CreateCell().SetCellValue(pageResult[i].BatteryLevel);

                rowtemp.CreateCell().SetCellValue(pageResult[i].BadReason);

                rowtemp.CreateCell().SetCellValue(pageResult[i].JudgeResult);

                rowtemp.CreateCell().SetCellValue(pageResult[i].Employee);

                rowtemp.CreateCell().SetCellValue(pageResult[i].LineTitle);

                rowtemp.CreateCell().SetCellValue(pageResult[i].StationTitle);

                rowtemp.CreateCell().SetCellValue(pageResult[i].Remark);

                rowtemp.CreateCell().SetCellValue(pageResult[i].DateTime);

                rowtemp.CreateCell().SetCellValue(pageResult[i].ScanDate);

                rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Eff)));

                rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Isc)));

                rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Voc)));

                rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Rs)));

                rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Rsh)));

                rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Vpm)));

                rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].FF)));

                rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Sun)));

                rowtemp.CreateCell().SetCellValue(Convert.ToDouble(string.Format("{0:0.00000}", pageResult[i].Temp)));

                rowtemp.CreateCell().SetCellValue(pageResult[i].Class);

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = numberStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = numberStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = textStyle;

                rowtemp.GetCell().CellStyle = dateStyle;

                rowtemp.GetCell().CellStyle = dateStyle;

                rowtemp.GetCell().CellStyle = numberStyle;

                rowtemp.GetCell().CellStyle = numberStyle;

                rowtemp.GetCell().CellStyle = numberStyle;

                rowtemp.GetCell().CellStyle = numberStyle;

                rowtemp.GetCell().CellStyle = numberStyle;

                rowtemp.GetCell().CellStyle = numberStyle;

                rowtemp.GetCell().CellStyle = numberStyle;

                rowtemp.GetCell().CellStyle = numberStyle;

                rowtemp.GetCell().CellStyle = numberStyle;

                rowtemp.GetCell().CellStyle = textStyle;

            }

            //写入到客户端

            System.IO.MemoryStream ms = new System.IO.MemoryStream();

            workbook.Write(ms);

            Response.BinaryWrite(ms.ToArray());

            Response.Flush();

            Response.End();

        }

NPOI操作类

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.IO;
using System.Text;
using NPOI;
using NPOI.HPSF;
using NPOI.HSSF;
using NPOI.HSSF.UserModel;
using NPOI.HSSF.Util;
using NPOI.POIFS;
using NPOI.Util;
namespace PMS.Common
{
    public class NPOIHelper
    {
        /// <summary>
        /// DataTable导出到Excel文件
        /// </summary>
        /// <param name="dtSource">源DataTable</param>
        /// <param name="strHeaderText">表头文本</param>
        /// <param name="strFileName">保存位置</param>
        public static void Export(DataTable dtSource, string strHeaderText, string strFileName)
        {
            using (MemoryStream ms = Export(dtSource, strHeaderText))
            {
                using (FileStream fs = new FileStream(strFileName, FileMode.Create, FileAccess.Write))
                {
                    byte[] data = ms.ToArray();
                    fs.Write(data, 0, data.Length);
                    fs.Flush();
                }
            }
        }

/// <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();

#region 右击文件属性信息
            {
                DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();
                dsi.Company = "NPOI";
                workbook.DocumentSummaryInformation = dsi;

SummaryInformation si = PropertySetFactory.CreateSummaryInformation();
                si.Author = "文件作者信息"; //填加xls文件作者信息
                si.ApplicationName = "创建程序信息"; //填加xls文件创建程序信息
                si.LastAuthor = "最后保存者信息"; //填加xls文件最后保存者信息
                si.Comments = "作者信息"; //填加xls文件作者信息
                si.Title = "标题信息"; //填加xls文件标题信息
                si.Subject = "主题信息";//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++)
                {
                    int intTemp = Encoding.GetEncoding(936).GetBytes(dtSource.Rows[i][j].ToString()).Length;
                    if (intTemp > arrColWidth[j])
                    {
                        arrColWidth[j] = intTemp;
                    }
                }
            }
            int rowIndex = 0;
            foreach (DataRow row in dtSource.Rows)
            {
                #region 新建表，填充表头，填充列头，样式
                if (rowIndex == 65535 || rowIndex == 0)
                {
                    if (rowIndex != 0)
                    {
                        sheet = workbook.CreateSheet();
                    }

#region 表头及样式
                    {
                        HSSFRow headerRow = sheet.CreateRow(0);
                        headerRow.HeightInPoints = 25;
                        headerRow.CreateCell(0).SetCellValue(strHeaderText);

HSSFCellStyle headStyle = workbook.CreateCellStyle();
                        headStyle.Alignment = CellHorizontalAlignment.CENTER;
                        HSSFFont font = workbook.CreateFont();
                        font.FontHeightInPoints = 20;
                        font.Boldweight = 700;
                        headStyle.SetFont(font);
                        headerRow.GetCell(0).CellStyle = headStyle;
                        sheet.AddMergedRegion(new Region(0, 0, 0, dtSource.Columns.Count - 1));
                        headerRow.Dispose();
                    }
                    #endregion

#region 列头及样式
                    {
                        HSSFRow headerRow = sheet.CreateRow(1);
                        HSSFCellStyle headStyle = workbook.CreateCellStyle();
                        headStyle.Alignment = CellHorizontalAlignment.CENTER;
                        HSSFFont font = workbook.CreateFont();
                        font.FontHeightInPoints = 10;
                        font.Boldweight = 700;
                        headStyle.SetFont(font);
                        foreach (DataColumn column in dtSource.Columns)
                        {
                            headerRow.CreateCell(column.Ordinal).SetCellValue(column.ColumnName);
                            headerRow.GetCell(column.Ordinal).CellStyle = headStyle;

//设置列宽
                            sheet.SetColumnWidth(column.Ordinal, (arrColWidth[column.Ordinal] + 1) * 256);
                        }
                        headerRow.Dispose();
                    }
                    #endregion

rowIndex = 2;
}
#endregion

#region 填充内容
                HSSFRow dataRow = sheet.CreateRow(rowIndex);
                foreach (DataColumn column in dtSource.Columns)
                {
                    HSSFCell newCell = dataRow.CreateCell(column.Ordinal);

string drValue = row[column].ToString();

switch (column.DataType.ToString())
                    {
                        case "System.String"://字符串类型
                            newCell.SetCellValue(drValue);
                            break;
                        case "System.DateTime"://日期类型
                            DateTime dateV;
                            DateTime.TryParse(drValue, out dateV);
                            newCell.SetCellValue(dateV);

newCell.CellStyle = dateStyle;//格式化显示
                            break;
                        case "System.Boolean"://布尔型
                            bool boolV = false;
                            bool.TryParse(drValue, out boolV);
                            newCell.SetCellValue(boolV);
                            break;
                        case "System.Int16"://整型
                        case "System.Int32":
                        case "System.Int64":
                        case "System.Byte":
                            int intV = 0;
                            int.TryParse(drValue, out intV);
                            newCell.SetCellValue(intV);
                            break;
                        case "System.Decimal"://浮点型
                        case "System.Double":
                            double doubV = 0;
                            double.TryParse(drValue, out doubV);
                            newCell.SetCellValue(doubV);
                            break;
                        case "System.DBNull"://空值处理
                            newCell.SetCellValue("");
                            break;
                        default:
                            newCell.SetCellValue("");
                            break;
                    }

}
#endregion

rowIndex++;
            }
            using (MemoryStream ms = new MemoryStream())
            {
                workbook.Write(ms);
                ms.Flush();
                ms.Position = 0;

sheet.Dispose();
                //workbook.Dispose();//一般只用写这一个就OK了，他会遍历并释放所有资源，但当前版本有问题所以只释放sheet
                return ms;
            }
        }

/// <summary>
        /// 用于Web导出
        /// </summary>
        /// <param name="dtSource">源DataTable</param>
        /// <param name="strHeaderText">表头文本</param>
        /// <param name="strFileName">文件名</param>
        public static void ExportByWeb(DataTable dtSource, string strHeaderText, string strFileName)
        {
            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("Content-Disposition",
                "attachment;filename=" + HttpUtility.UrlEncode(strFileName, Encoding.UTF8));

curContext.Response.BinaryWrite(Export(dtSource, strHeaderText).GetBuffer());
curContext.Response.End();
}

/// <summary>读取excel
        /// 默认第一行为标头
        /// </summary>
        /// <param name="strFileName">excel文档路径</param>
        /// <returns></returns>
        public static DataTable Import(string strFileName)
        {
            DataTable dt = new DataTable();

HSSFWorkbook hssfworkbook;
            using (FileStream file = new FileStream(strFileName, FileMode.Open, FileAccess.Read))
            {
                hssfworkbook = new HSSFWorkbook(file);
            }
            HSSFSheet sheet = hssfworkbook.GetSheetAt(0);
            System.Collections.IEnumerator rows = sheet.GetRowEnumerator();

HSSFRow headerRow = sheet.GetRow(0);
int cellCount = headerRow.LastCellNum;

for (int j = 0; j < cellCount; j++)
            {
                HSSFCell cell = headerRow.GetCell(j);
                dt.Columns.Add(cell.ToString());
            }

for (int i = (sheet.FirstRowNum + 1); i <= sheet.LastRowNum; i++)
            {
                HSSFRow row = sheet.GetRow(i);
                DataRow dataRow = dt.NewRow();

for (int j = row.FirstCellNum; j < cellCount; j++)
                {
                    if (row.GetCell(j) != null)
                        dataRow[j] = row.GetCell(j).ToString();
                }

dt.Rows.Add(dataRow);
            }
            return dt;
        }
    }
}

nopi导出的更多相关文章

NOPI导出Excel
NOPI导出Excel /// <summary> /// 导出的方法 Excel样式 /// </summary> /// <param name="ds&q ...
NOPI导出Excel 自定义列名
NOPI 做Excel 导出确实很方便 ,但是一直在用没好好研究. 在网上没找到自定义Columns的方法 ,于是乎自己就在原来的方法上简单地改改. 想用的童鞋们可以直接拿去用! /// 数据大于65 ...
NOPI导出加载模板
ListExcel导出(加载模板) /// <summary> /// List根据模板导出ExcelMemoryStream /// </summary> /// <p ...
NOPI 导出excel 通用方法
public static byte[] ExportExcel<T>(Dictionary<string, string> columnsHeader, List<T& ...
NOPI 导出 Excel 2007
代码: public static void ThisTo<T>( List<T> source, string[] colums, Func<T, object[]&g ...
NOPI导出execl 多个sheet,一列图片
NPOI API: http://www.cnblogs.com/atao/archive/2009/11/15/1603528.html http://blog.csdn.net/pan_junbi ...
NopI 导出数据
protected void exportAward(DataSet dsResult) { if (dsResult != null) { string fileName = System.Web. ...
Nopi 导出设置行高
1.导出excel行显示不完整数据客户不满意,需要我们处理 ; rowNum <= sheet.LastRowNum; rowNum++) { HSSFRow currentRow = shee ...
asp.net mvc4 easyui datagrid 增删改查分页导出先上传后导入 NPOI批量导入导出EXCEL
效果图数据库代码 create database CardManage use CardManage create table CardManage ( ID ,) primary key, use ...

随机推荐

成都Uber优步司机奖励政策（3月14日）
滴快车单单2.5倍,注册地址:http://www.udache.com/ 如何注册Uber司机(全国版最新最详细注册流程)/月入2万/不用抢单:http://www.cnblogs.com/mfry ...
海思NB-IOT的RA功能
就带ReleaseAssistance标志的特殊发送指令,发送数据的时候会向网络侧请求立即释放RRC进入Idle态. 降低20秒50mA连接态的能量消耗.
虚拟机安装win7 64位-完美解决-费元星
安装虚拟机是为了安装一个oracle ,在本机安装 ,本机会卡死,不是每次启动电脑都用oralce,而且有时候服务是关不干净的,所以安装在虚拟机里,需要的时候在开启,特做此记录! 费元星版权Q[971 ...
Java - 无乱码读写文件
Java读取数据流的时候,一定要指定数据流的编码方式,否则将使用本地环境中的默认字符集. BufferedReader reader = null; String laststr = "&q ...
cf#514B. Forgery(暴力)
B. Forgerytime limit per test2 secondsmemory limit per test256 megabytesinputstandard inputoutputsta ...
180709-Java实现获取本机Ip的工具类
180709-Java实现获取本机Ip的工具类获取本机Ip算是比较常见的一个需求场景了,比如业务报警,可能就会带上出问题的机器IP,方便直接上去看日志定位问题,那么问题来了,如何获取机器IP呢? I ...
记录---Testin上新手测试用例设计实战---碎乐3.2.0
平台上给的版本是碎乐3.12版的,但是平台上给的安装包下载不了,所以加群咨询之后给出了直接去手机应用商店下载搜索到的版本的对策.所以就那应用商店中找到的3.2.0版本来设计测试用例.因为任务中没有给出 ...
leetcode-前K个高频元素
给定一个非空的整数数组,返回其中出现频率前 k 高的元素. 示例 1: 输入: nums = [1,1,1,2,2,3], k = 2 输出: [1,2] 示例 2: 输入: nums = [1], ...
Machine Learning笔记整理 ------ （四）线性模型
1. 线性模型基本形式:给定由d个属性描述的样本 x = (x1; x2; ......; xd),其中,xi是x在第i个属性上的取值,则有: f(x) = w1x1 + w2x2 + ...... ...
LogisticRegression Algorithm——机器学习（西瓜书）读书笔记
import numpy as np from sklearn.datasets import load_breast_cancer import sklearn.linear_model from ...

nopi导出

nopi导出的更多相关文章

随机推荐

热门专题