还真没做过winform的导出导入，今天上网百度了一下。结果---

所以还是我自己写个吧。之前做过web的，半搬半做就OK。

1添加引用：Aspose.Cells.dll（我们就叫工具包吧，可以从网上下载。关于它的操作我在“Aspose.Cells操作说明 中文版 下载 Aspose C# 导出Excel 实例”一文中的说。这里你暂时也可不理会它。）

Aspose.Cells.dll  和中文说明 下载地址： http://item.taobao.com/auction/item_detail-0db2-f9b1d99e6cb27d78ae9e6373a1529633.htm

即使没有安装office也能用噢，这是一个好强的大工具。

2编写Excel操作类

using System;
using System.Collections.Generic;
using System.Text;
using Aspose.Cells;
using System.Data;

public class AsposeExcel
{

     private string outFileName = "";
     private string fullFilename = "";
     private Workbook book = null;
     private Worksheet sheet = null;

     public AsposeExcel(string outfilename, string tempfilename)//导出构造数
     {
         outFileName = outfilename;
         book = new Workbook();
         // book.Open(tempfilename);这里我们暂时不用模板
         sheet = book.Worksheets[0];
     }
     public AsposeExcel(string fullfilename)//导入构造数
     {
         fullFilename = fullfilename;
         // book = new Workbook();
         //book.Open(tempfilename);
         //sheet = book.Worksheets[0];
     }

     private void AddTitle(string title, int columnCount)
     {
         sheet.Cells.Merge(0, 0, 1, columnCount);
         sheet.Cells.Merge(1, 0, 1, columnCount);

         Cell cell1 = sheet.Cells[0, 0];
         cell1.PutValue(title);
         cell1.Style.HorizontalAlignment = TextAlignmentType.Center;
         cell1.Style.Font.Name = "黑体";
         cell1.Style.Font.Size = 14;
         cell1.Style.Font.IsBold = true;

         Cell cell2 = sheet.Cells[1, 0];
         cell1.PutValue("查询时间：" + DateTime.Now.ToLocalTime());
         cell2.SetStyle(cell1.Style);
     }

     private void AddHeader(DataTable dt)
     {
         Cell cell = null;
         for (int col = 0; col < dt.Columns.Count; col++)
         {
             cell = sheet.Cells[0, col];
             cell.PutValue(dt.Columns[col].ColumnName);
             cell.Style.Font.IsBold = true;
         }
     }

     private void AddBody(DataTable dt)
     {
         for (int r = 0; r < dt.Rows.Count; r++)
         {
             for (int c = 0; c < dt.Columns.Count; c++)
             {
                 sheet.Cells[r + 1, c].PutValue(dt.Rows[r][c].ToString());
             }
         }
     }
     //导出------------下一篇会用到这个方法
     public Boolean DatatableToExcel(DataTable dt)
     {
         Boolean yn = false;
         try
         {
             //sheet.Name = sheetName;

             //AddTitle(title, dt.Columns.Count);
             //AddHeader(dt);
             AddBody(dt);

             sheet.AutoFitColumns();
             //sheet.AutoFitRows();

             book.Save(outFileName);
             yn = true;
             return yn;
         }
         catch (Exception e)
         {
             return yn;
             // throw e;
         }
     }

     public DataTable ExcelToDatatalbe()//导入
     {
         Workbook book = new Workbook();
         book.Open(fullFilename);
         Worksheet sheet = book.Worksheets[0];
         Cells cells = sheet.Cells;
         //获取excel中的数据保存到一个datatable中
         DataTable dt_Import = cells.ExportDataTableAsString(0, 0, cells.MaxDataRow + 1, cells.MaxDataColumn + 1, false);
         // dt_Import.
         return dt_Import;
     }
}

3导出按钮事件中编写导出数据方法：

private void bt_excel_out_Click(object sender, EventArgs e)
         {
           
             SaveFileDialog saveFileDialog1 = new SaveFileDialog();//如果你直接从对话框中拉出来，就不用new了噢。

           //设置文件类型
             saveFileDialog1.Filter = "导出Excel (*.xls)|*.xls|Word (*.doc)|*.doc";
             saveFileDialog1.FilterIndex = 2;
             saveFileDialog1.RestoreDirectory = true;
             saveFileDialog1.CreatePrompt = true;
             saveFileDialog1.Title = "导出文件保存路径";
             //saveFileDialog1.ShowDialog();
             //string strName = saveFileDialog1.FileName;

             //设置默认文件类型显示顺序    
             //saveFileDialog1.FilterIndex = 2; 

             //保存对话框是否记忆上次打开的目录    
             saveFileDialog1.RestoreDirectory = true;

             //点了保存按钮进入    
             if (saveFileDialog1.ShowDialog() == DialogResult.OK)
             {
                 //获得文件路径    
                 string localFilePath = saveFileDialog1.FileName.ToString();

                 //获取文件名，不带路径    
                 string fileNameExt = localFilePath.Substring(localFilePath.LastIndexOf("\\") + 1);

                 //获取文件路径，不带文件名    
                 string FilePath = localFilePath.Substring(0, localFilePath.LastIndexOf("\\"));

                 //给文件名前加上时间    
                 string newFileName = DateTime.Now.ToString("yyyyMMdd") + fileNameExt;

                 saveFileDialog1.FileName = FilePath + "\\" + newFileName;
                 System.IO.FileStream fs = (System.IO.FileStream)saveFileDialog1.OpenFile();//输出文件 

                 //下面是导出数据到doc        导出到excel请看下一篇（发现没有AsposeExcel
类还没有用到呢，那正是导出到excel要用的）
                 StreamWriter writer = new StreamWriter(fs);
                 writer.Write("tttt");//这里就是你要导出到word文档的数据
                 writer.Flush();
                 writer.Close();
                 fs.Close();

             }

         }

C# winform 导出导入Excel/Doc 完整实例教程[网上看到的]