刚刚初入职场，在休闲的时间写下了项目中用到的对Excel文档操作的方法以及总结，多的不说，直接上代码

public static void CreateExcel(DataSet ds, string FileName)

        {

            //resp = Page.Response;

            HttpContext.Current.Response.Clear();

            HttpContext.Current.Response.Buffer = true;

            HttpContext.Current.Response.Charset = "UTF-8";

            HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.UTF8;

            HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls");

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

            string colHeaders = "", ls_item = "";

            int i = 0;

            //定¨义?表括?对?象ó与?行D对?像?，?同?时骸?用?DataSet对?其?值μ进?行D初?始?化ˉ

            System.Data.DataTable dt = ds.Tables[0];

            DataRow[] myRow = dt.Select("");

            //取?得?数簓据Y表括?各÷列标括?题琣，?各÷标括?题琣之?间?以?\t分?割?，?最?后ó一?个?列标括?题琣后ó加ó回?车μ符?

            for (i = 0; i < dt.Columns.Count - 1; i++)

                colHeaders += dt.Columns[i].Caption.ToString() + "\t";

            colHeaders += dt.Columns[i].Caption.ToString() + "\n";

            //向òHTTP输?出?流ⅰ?中D写′入?取?得?的?数簓据Y信?息￠

            HttpContext.Current.Response.Write(colHeaders);

            //逐e行D处鋦理え?数簓据Y  

            foreach (DataRow row in myRow)

            {

                //在ú当獭?前°行D中D，?逐e列获?得?数簓据Y，?数簓据Y之?间?以?\t分?割?，?结á束?时骸?加ó回?车μ符?\n

                for (i = 0; i < dt.Columns.Count - 1; i++)

                    ls_item += row[i].ToString() + "\t";

                ls_item += row[i].ToString() + "\n";

                //当獭?前行D数簓据Y写′入?HTTP输?出?流ⅰ?，?并￠且ò置?空?ls_item以?便?下?行D数簓据Y    

                HttpContext.Current.Response.Write(ls_item);

                ls_item = "";

            }

            //写′缓o冲?区?中D的?数簓据Y到?HTTP头?文?件t中D

            HttpContext.Current.Response.End();

        }

方法2:NPIO导出Excel数据。这种方式方便快捷，要引入第三方的NPIO.dll的文件，下载地址http://npoi.codeplex.com/releases/view/38113   

  protected void getExcel(DataTable dt, string FileName)

        {

            NPOI.HSSF.UserModel.HSSFWorkbook book = new NPOI.HSSF.UserModel.HSSFWorkbook();

            NPOI.SS.UserModel.ISheet sheet = book.CreateSheet("Sheet1");

            NPOI.SS.UserModel.IRow headerrow = sheet.CreateRow(0);

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

            {

                headerrow.CreateCell(i).SetCellValue(dt.Columns[i].ColumnName);

            }

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

            {

                NPOI.SS.UserModel.IRow row2 = sheet.CreateRow(i + 1);

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

                    row2.CreateCell(j).SetCellValue(dt.Rows[i][j].ToString());

            }

            //写′入到客户端

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

            book.Write(ms);

            Response.AddHeader("Content-Disposition", string.Format("attachment;filename=" + System.Web.HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls"));

            Response.BinaryWrite(ms.ToArray());

            book = null;

            ms.Close();

            ms.Dispose();

        }

直接在点击事件调用即可

二，导入Excel数据

导入Excel需要引用微软官方的OleDb驱动

protected void btnUpload_Click(object sender, EventArgs e)

        {

            if (txtFilePath.HasFile)

            {

                OleDbConnection conn = new OleDbConnection();

                OleDbCommand cmd = new OleDbCommand();

                OleDbDataAdapter da = new OleDbDataAdapter();

                DataSet ds = new DataSet();

                string query = null;

                string connString = "";

                //string strFileName = DateTime.Now.ToString("ddMMyyyy_HHmmss");

                string strFileType = System.IO.Path.GetExtension(txtFilePath.FileName).ToString().ToLower();

                if (strFileType == ".xls" || strFileType == ".xlsx")

                {

                    txtFilePath.SaveAs(Server.MapPath("~/upload/" + strFileType));

                }

                string strNewPath = Server.MapPath("~/upload/" + strFileType);

                if (strFileType.Trim() == ".xls")

                {

                    connString = "Provider=Microsoft.Ace.OleDb.12.0;" + "data source=" + strNewPath + ";Extended Properties='Excel 12.0; HDR=Yes; IMEX=1'";

                }

                else if (strFileType.Trim() == ".xlsx")

                {

                    connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + strNewPath + ";Extended Properties=\"Excel 12.0;HDR=Yes;IMEX=2\"";

                }

                query = "SELECT * FROM [Sheet1$]";

                conn = new OleDbConnection(connString);

                if (conn.State == ConnectionState.Closed) conn.Open();

                cmd = new OleDbCommand(query, conn);

                da = new OleDbDataAdapter(cmd);

                ds = new DataSet();

                da.Fill(ds);

          da.Dispose();

                conn.Close();

                conn.Dispose();

注意：如果使用上述的第一种方式先导出Excel，然后在导入Excel，会报错，因为第一种方式导出的不是标准的Excel，是html的方式导出的，第二种NPIO导出，这个是标准的Excel数据。