C# NPOI 导出Excel

因为我使用wpf简单写的一个Demo，我会将代码全部都写在这里面，里面有的地方有些乱，慢慢的再去整理，里面可能有参考其他人整理的代码，参考过来的！希望对大家有帮助

下面是MainWindow.xaml文件

<Window x:Class="_004ExportExcelDemo.MainWindow"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"mc:Ignorable="d"Title="MainWindow" Height="350" Width="525"><Grid><ListView x:Name="lv" HorizontalAlignment="Left" Height="273" Margin="10,10,0,0" VerticalAlignment="Top" Width="497"><ListView.View><GridView><GridViewColumn Width="50" Header="序号" DisplayMemberBinding="{Binding Index}"/><GridViewColumn Width="100" Header="学号" DisplayMemberBinding="{Binding Id}"/><GridViewColumn Width="100" Header="姓名" DisplayMemberBinding="{Binding Name}"/><GridViewColumn Width="50" Header="成绩" DisplayMemberBinding="{Binding Score}"/><GridViewColumn Width="100" Header="学科" DisplayMemberBinding="{Binding Subject}"/><GridViewColumn Width="100" Header="备注" DisplayMemberBinding="{Binding Remark}"/></GridView></ListView.View></ListView><Button Content="导出" HorizontalAlignment="Left" Margin="412,288,0,0" VerticalAlignment="Top" Width="95" RenderTransformOrigin="0.628,-0.37" Height="22" Click="Button_Click"/></Grid>
</Window>

下面是MainWindow.xaml.cs

using _004ExportExcelDemo.Models;
using System.Collections.Generic;
using System.Data;
using System.Windows;namespace _004ExportExcelDemo
{/// <summary>/// MainWindow.xaml 的交互逻辑/// </summary>public partial class MainWindow : Window{public MainWindow(){InitializeComponent();this.Loaded += MainWindow_Loaded;}private void MainWindow_Loaded(object sender, RoutedEventArgs e){var list = new List<StudentModel>{new StudentModel{Index = 1, Id = "2013030001", Name = "梁志伟", Subject = "数学", Score = 95, Remark = "不错"},new StudentModel{Index = 2, Id = "2013030002", Name = "丁纪明", Subject = "数学", Score = 92, Remark = "不错"},new StudentModel{Index = 3, Id = "2013030003", Name = "舒伟琪", Subject = "数学", Score = 97, Remark = "不错"},new StudentModel{Index = 4, Id = "2013030004", Name = "王涛", Subject = "数学", Score = 88, Remark = "不错"},new StudentModel{Index = 5, Id = "2013030005", Name = "贾晓鹏", Subject = "数学", Score = 90, Remark = "不错"},new StudentModel{Index = 6, Id = "2013030006", Name = "徐菲", Subject = "数学", Score = 95, Remark = "不错"},};this.lv.ItemsSource = null;this.lv.ItemsSource = list;}private void Button_Click(object sender, RoutedEventArgs e){var list = this.lv.ItemsSource as List<StudentModel>;System.Windows.Forms.SaveFileDialog sfd = new System.Windows.Forms.SaveFileDialog();sfd.FileName = "导出内容.xls";sfd.Filter = "*.xls|";if (sfd.ShowDialog() != System.Windows.Forms.DialogResult.OK)return;Export(list, sfd.FileName);}private void Export(List<StudentModel> list, string path){var dt = new DataTable();dt.Columns.Add("序号");dt.Columns.Add("编号");dt.Columns.Add("姓名");dt.Columns.Add("学科");dt.Columns.Add("成绩");dt.Columns.Add("备注");foreach (var item in list){DataRow row = dt.NewRow();row[0] = item.Index;row[1] = item.Id;row[2] = item.Name;row[3] = item.Subject;row[4] = item.Score;row[5] = item.Remark;dt.Rows.Add(row);}NPOIExportExcelHelper.Instance.Export(dt, "", path);MessageBox.Show("导出成功！");}}
}

这里面实体就不写在里面了，下面是导出的操作

using System.Data;
using System.IO;
using System.Text;
using NPOI.HPSF;
using NPOI.HSSF.UserModel;
using System;
using NPOI.SS.Util;namespace _004ExportExcelDemo
{public class NPOIExportExcelHelper{private static NPOIExportExcelHelper _instance;public static NPOIExportExcelHelper Instance{get{if (_instance == null){_instance = new NPOIExportExcelHelper();}return NPOIExportExcelHelper._instance;}}/// <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 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 MemoryStream Export(DataTable dtSource, string strHeaderText){HSSFWorkbook workbook = new HSSFWorkbook();HSSFSheet sheet = (HSSFSheet)workbook.CreateSheet();#region 右击文件 属性信息{DocumentSummaryInformation dsi = PropertySetFactory.CreateDocumentSummaryInformation();dsi.Company = "瑞杰";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;}#endregionHSSFCellStyle dateStyle = (HSSFCellStyle)workbook.CreateCellStyle();HSSFDataFormat format = (HSSFDataFormat)workbook.CreateDataFormat();dateStyle.DataFormat = format.GetFormat("yyyy-mm-dd");dateStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;HSSFCellStyle CommonStyle = (HSSFCellStyle)workbook.CreateCellStyle();CommonStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;//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 = (HSSFSheet)workbook.CreateSheet();}#region 表头及样式{HSSFRow headerRow = (HSSFRow)sheet.CreateRow(0);headerRow.HeightInPoints = 25;headerRow.CreateCell(0).SetCellValue(strHeaderText);HSSFCellStyle headStyle = (HSSFCellStyle)workbook.CreateCellStyle();headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;HSSFFont font = (HSSFFont)workbook.CreateFont();font.FontHeightInPoints = 20;font.Boldweight = 00;headStyle.SetFont(font);headerRow.GetCell(0).CellStyle = headStyle;sheet.AddMergedRegion(new Region(0, 0, 0, dtSource.Columns.Count - 1));}#endregion#region 列头及样式{HSSFRow headerRow = (HSSFRow)sheet.CreateRow(1);HSSFCellStyle headStyle = (HSSFCellStyle)workbook.CreateCellStyle();headStyle.Alignment = NPOI.SS.UserModel.HorizontalAlignment.Center;HSSFFont font = (HSSFFont)workbook.CreateFont();font.FontHeightInPoints = 12;font.Boldweight = 400;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();}#endregionrowIndex = 2;}#endregion#region 填充内容HSSFRow dataRow = (HSSFRow)sheet.CreateRow(rowIndex);foreach (DataColumn column in dtSource.Columns){HSSFCell newCell = (HSSFCell)dataRow.CreateCell(column.Ordinal);string drValue = row[column].ToString();switch (column.DataType.ToString()){case "System.String"://字符串类型newCell.SetCellValue(drValue);newCell.CellStyle = CommonStyle;//普通样式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);newCell.CellStyle = CommonStyle;//普通样式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);newCell.CellStyle = CommonStyle;//普通样式break;case "System.Decimal"://浮点型case "System.Double":double doubV = 0;double.TryParse(drValue, out doubV);newCell.SetCellValue(doubV);newCell.CellStyle = CommonStyle;//普通样式break;case "System.DBNull"://空值处理newCell.SetCellValue("");newCell.CellStyle = CommonStyle;//普通样式break;default:newCell.SetCellValue("");newCell.CellStyle = CommonStyle;//普通样式break;}}#endregionrowIndex++;}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sheetreturn ms;}}}
}

http://download.csdn.net/download/l_zhiwei/10207690

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