网页html格式导出Excel.xls

1.创建excel方法
 /// <summary>
        /// 创建Excel表格
        /// </summary>
        /// <param name="dt">数据流</param>
        /// <param name="FileName">文件名称</param>
        public static void CreateExcel(DataTable dt, string FileName)
        {
            StringBuilder strb = new StringBuilder();

            strb.Append(" <html xmlns:o=\"urn:schemas-microsoft-com:office:office\"");

            strb.Append("xmlns:x=\"urn:schemas-microsoft-com:office:excel\"");

            strb.Append("xmlns=\"http://www.w3.org/TR/REC-html40\">");

            strb.Append(" <head> <meta http-equiv='Content-Type' content='text/html; charset=gb2312'>");

            strb.Append(" <style>");

            strb.Append(".xl26");

            strb.Append(" {mso-style-parent:style0;");

            strb.Append(" font-family:\"Times New Roman\", serif;");

            strb.Append(" mso-font-charset:0;");

            strb.Append(" mso-number-format:\"@\";}");

            strb.Append(" </style>");

            strb.Append(" <xml>");

            strb.Append(" <x:ExcelWorkbook>");

            strb.Append("  <x:ExcelWorksheets>");

            strb.Append("  <x:ExcelWorksheet>");

            strb.Append("    <x:Name>Sheet1 </x:Name>");

            strb.Append("    <x:WorksheetOptions>");

            strb.Append("    <x:DefaultRowHeight>285 </x:DefaultRowHeight>");

            strb.Append("    <x:Selected/>");

            strb.Append("    <x:Panes>");

            strb.Append("      <x:Pane>");

            strb.Append("      <x:Number>3 </x:Number>");

            strb.Append("      <x:ActiveCol>1 </x:ActiveCol>");

            strb.Append("      </x:Pane>");

            strb.Append("    </x:Panes>");

            strb.Append("    <x:ProtectContents>False </x:ProtectContents>");

            strb.Append("    <x:ProtectObjects>False </x:ProtectObjects>");

            strb.Append("    <x:ProtectScenarios>False </x:ProtectScenarios>");

            strb.Append("    </x:WorksheetOptions>");

            strb.Append("  </x:ExcelWorksheet>");

            strb.Append("  <x:WindowHeight>6750 </x:WindowHeight>");

            strb.Append("  <x:WindowWidth>10620 </x:WindowWidth>");

            strb.Append("  <x:WindowTopX>480 </x:WindowTopX>");

            strb.Append("  <x:WindowTopY>75 </x:WindowTopY>");

            strb.Append("  <x:ProtectStructure>False </x:ProtectStructure>");

            strb.Append("  <x:ProtectWindows>False </x:ProtectWindows>");

            strb.Append(" </x:ExcelWorkbook>");

            strb.Append(" </xml>");

            strb.Append("");

            strb.Append(" </head> <body> <table align=\"center\" style='border-collapse:collapse;table-layout:fixed'> <tr>");





            //写列标题    

            int columncount = dt.Columns.Count;

            for (int columi = 0; columi < columncount; columi++)
            {

                strb.Append(" <td> <b>" + dt.Columns[columi] + " </b> </td>");

            }

            strb.Append(" </tr>");

            //写数据    


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

                strb.Append(" <tr>");

                for (int j = 0; j < dt.Columns.Count; j++)
                {
                    strb.Append(" <td class='xl26'>" + dt.Rows[i][j].ToString() + " </td>");
                }

                strb.Append(" </tr>");
            }

            strb.Append(" </table>");


            strb.Append(" </body> </html>");


            HttpContext.Current.Response.Clear();

            HttpContext.Current.Response.Buffer = true;

            HttpContext.Current.Response.Charset = "GB2312";

            HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + FileName);

            HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");//设置输出流为简体中文    

            HttpContext.Current.Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。    

            HttpContext.Current.Response.Write(strb);

            HttpContext.Current.Response.End();

        }
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