用HTML 格式导出Excel 时,如何保留显示网格线

用HTML 格式导出Excel 时,如何保留显示网格线
[阅读次数:918次]  [发布时间:2009年11月9日]

ASP.NET 中 用 DataGrid 的 RenderControl 方法输出到 Excel,是一种常见的办法。其本质是用 html 语法编写 Excel, 表 格用 table 表示。但是默认情形下会发现 Excel 的背景中的网格线(Gridlines) 不显示。用什么选项可以显示网格线呢?搜索了一 下,答案是在 <head /> 中嵌入一段内容指示一些选项即可。
<html xmlns:x="urn:schemas-microsoft-com:office:excel">
    <head>
        <!--[if gte mso 9]><xml>
            <x:ExcelWorkbook>
                <x:ExcelWorksheets>
                    <x:ExcelWorksheet>
                        <x:Name>工作表标题</x:Name>
                        <x:WorksheetOptions>
                            <x:Print>
                                <x:ValidPrinterInfo />
                            </x:Print>
                        </x:WorksheetOptions>
                    </x:ExcelWorksheet>
                </x:ExcelWorksheets>
            </x:ExcelWorkbook>
        </xml>
        <![endif]-->

    </head>
    <body>
        <table border="1">
            <tr>
                <td>test</td>
                <td>test</td>
                <td>test</td>
                <td>test</td>
            </tr>
            <tr>
                <td>test</td>
                <td>test</td>
                <td>test</td>
                <td>test</td>
            </tr>
            <tr>
                <td>test</td>
                <td>test</td>
                <td>test</td>
                <td>test</td>
            </tr>
        </table>
    </body>
</html>

红色两部分都要添加才行。、

           <div id="print1"  runat="server"></div>

        ToExcel(print1, "dfds");  

/// <summary>
        /// 导出 Excel 文件
        /// </summary>
        /// <param name="control">控件名称</param>
        /// <param name="fileName">Excel 文件名(不含扩展名)</param>
        /// <param name="unformat">是否去除链接格式化串</param>
        public static void ToExcel(Control control, string fileName, bool unformat)
        {
            System.IO.StringWriter tw = new System.IO.StringWriter();
            System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);
            control.RenderControl(hw);

            System.Web.HttpResponse Response = System.Web.HttpContext.Current.Response;

            Response.Write(control.ToString());
            Response.Clear();
            Response.Charset = "gb2312";
            Response.ContentType = "application/vnd.ms-excel";
            Response.AppendHeader("Content-Disposition", "attachment;filename=" + System.Web.HttpUtility.UrlEncode(fileName) + ".xls");
            Response.Write(@"<html  xmlns:x='urn:schemas-microsoft-com:office:excel'><head> <!--[if gte mso 9]><xml>
            <x:ExcelWorkbook>
                <x:ExcelWorksheets>
                    <x:ExcelWorksheet>
                        <x:Name>工作表标题</x:Name>
                        <x:WorksheetOptions>
                            <x:Print>
                                <x:ValidPrinterInfo />
                            </x:Print>
                        </x:WorksheetOptions>
                    </x:ExcelWorksheet>
                </x:ExcelWorksheets>
            </x:ExcelWorkbook>
        </xml>
        <![endif]--> <META http-equiv='Content-Type' content='text/html; charset=gb2312'></head><body>");
            string output = tw.ToString();
            if (unformat)
            {
    
                output = Regex.Replace(output, @"<\s*/?\s*a[^>]*>", "", RegexOptions.Compiled | RegexOptions.IgnoreCase);
                output = Regex.Replace(output, @"<\s*/?\s*img[^>]*>", "", RegexOptions.Compiled | RegexOptions.IgnoreCase);
            }
            Response.Write(output);
            Response.Write("</body></html>");
            Response.End();
            hw.Close();
            hw.Flush();
            tw.Close();
            tw.Flush();
        }

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