伪Excel导出新版代码

    /// <summary>
    /// 导出Excel  CreateExcel(ds, "统计表.xls",new int[]{6,8});
    /// </summary>
    /// <param name="ds">DataSet ds</param>
    /// <param name="FileName">文件名称</param>
    /// <param name="iarry">new int[] {6,8};</param>
    public void CreateExcel(DataSet ds, string FileName,int[] iarry)
    {
        FileName = HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8);

        HttpResponse resp;
        resp = Page.Response;
        resp.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
        resp.AppendHeader("Content-Disposition", "attachment;filename=" + FileName);

        StringBuilder colHeaders = new StringBuilder();
        StringBuilder ls_item = new StringBuilder();

        DataTable dt = ds.Tables[0];
        DataRow[] myRow = dt.Select();//可以类似dt.Select("id>10")之形式达到数据筛选目的
        int i = 0;
        int cl = dt.Columns.Count;

        //取得数据表各列标题，各标题之间以t分割，最后一个列标题后加回车符
        for (i = 0; i < cl; i++)
        {
            if (i == (cl - 1))//最后一列，加n
            {
                colHeaders.Append(dt.Columns[i].Caption.ToString() + "\n");
            }
            else
            {
                colHeaders.Append(dt.Columns[i].Caption.ToString() + "\t");
            }

        }
        resp.Write(colHeaders.ToString());
        //向HTTP输出流中写入取得的数据信息

        //逐行处理数据
        foreach (DataRow row in myRow)
        {
            //当前行数据写入HTTP输出流，并且置空ls_item以便下行数据
            for (i = 0; i < cl; i++)
            {
                if (iarry.Contains(i))
                {
                    ls_item.Append("=\"" + Convert.ToString(row[i]) + "\"\t");
                }
                else
                {
                    if (i == (cl - 1))//最后一列，加n
                    {
                        ls_item.Append(row[i].ToString() + "\n");
                    }
                    else
                    {
                        ls_item.Append(Convert.ToString(row[i]) + "\t");
                    }
                }
            }

            resp.Write(ls_item.ToString());
            ls_item.Clear();
        }
        resp.End();
    }

第二种

    /// <summary>
    /// DataSetToExcel(this, ds, "人员信息表.xls", new string[] { "身份证", "账户" });
    /// </summary>
    /// <param name="page">this</param>
    /// <param name="ds">DateSet</param>
    /// <param name="fileName">xxx.xxx</param>
    /// <param name="sarry">数字文本</param>
    public void DataSetToExcel(Page page,DataSet ds,string fileName,string[] sarry )
    {
        page.Response.Clear();
        page.Response.Buffer = true;
        page.Response.Charset = "GB2312";
        //page.Response.Charset = "UTF-8";
        fileName = HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8);
        page.Response.AppendHeader("Content-Disposition", "attachment;filename=" + fileName);
        page.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");//设置输出流为简体中文
        page.Response.ContentType = "application/vnd.ms-excel";//设置输出文件类型为excel文件。
        page.Response.ContentType = "";
        page.EnableViewState = false;

        /// 1） 文本：vnd.ms-excel.numberformat:@
        /// 2） 日期：vnd.ms-excel.numberformat:yyyy/mm/dd
        /// 3） 数字：vnd.ms-excel.numberformat:#,##0.00
        /// 4） 货币：vnd.ms-excel.numberformat:￥#,##0.00
        /// 5） 百分比：vnd.ms-excel.numberformat: #0.00%

        StringBuilder sb = new StringBuilder();
        int count = 0;
        foreach (DataTable tb in ds.Tables)
        {
            sb.AppendLine("<meta http-equiv=\"Content-Type\" content=\"text/html; charset=gb2312\">");
            sb.AppendLine("<table cellspacing=\"0\" cellpadding=\"5\" rules=\"all\" border=\"1\">");

            sb.AppendLine("<tr style=\"font-weight: bold; white-space: nowrap;\">");
            foreach (DataColumn column in tb.Columns)
            {
                sb.AppendLine("<td>" + column.ColumnName + "</td>");
            }
            sb.AppendLine("</tr>");

            foreach (DataRow row in tb.Rows)
            {
                sb.Append("<tr>");
                foreach (DataColumn column in tb.Columns)
                {
                    if (sarry.Contains(column.ColumnName))
                        sb.Append("<td style=\"vnd.ms-excel.numberformat:@\">" + row[column].ToString() + "</td>");
                    else
                        sb.Append("<td>" + row[column].ToString() + "</td>");
                }
                sb.AppendLine("</tr>");
                count++;
            }
            sb.AppendLine("</table>");
        }

        page.Response.Write(sb.ToString());
        page.Response.End();
    }