将某些html导出到excel文件时如何防止css丢失？答案

【问题标题】：How to prevent css missing when exporting some html to excel file?将某些html导出到excel文件时如何防止css丢失？
【发布时间】：2013-10-24 15:56:37
【问题描述】：

我正在使用以下代码成功地将 html 表导出到 excel 文件

    public void exportGridToExcel(Control ctl)
    {
        string attachment = "attachment; filename=etrack_excel_export.xls";
        HttpContext.Current.Response.ClearContent();
        HttpContext.Current.Response.AddHeader("content-disposition", attachment);
        HttpContext.Current.Response.ContentType = "application/ms-excel";
        StringWriter stw = new StringWriter();
        HtmlTextWriter htextw = new HtmlTextWriter(stw);

        ctl.RenderControl(htextw);
        HttpContext.Current.Response.Write(stw.ToString());
        HttpContext.Current.Response.End();
    }

问题是导出后我应用于表格的所有css在excel文件中都丢失了，如何防止css丢失？

【问题讨论】：

标签： c# asp.net css export-to-excel

【解决方案1】：

我终于有办法了！我把它分享给任何有同样问题的人：

        string attachment = "attachment; filename=etrack_excel_export.xls";
        HttpContext.Current.Response.ClearContent();
        HttpContext.Current.Response.AddHeader("content-disposition", attachment);
        HttpContext.Current.Response.ContentType = "application/ms-excel";
        StringWriter stw = new StringWriter();
        HtmlTextWriter htextw = new HtmlTextWriter(stw);
        ctl.RenderControl(htextw);
        HttpContext.Current.Response.Write(stw.ToString());
        FileInfo fi = new FileInfo(Server.MapPath("../Content/Styles/StyleSheet.css"));
        System.Text.StringBuilder sb = new System.Text.StringBuilder();
        StreamReader sr = fi.OpenText();
        while (sr.Peek() >= 0)
        {
            sb.Append(sr.ReadLine());
        }
        sr.Close();
        Response.Write("<html><head><style type='text/css'>" + sb.ToString() + "</style></head>" + stw.ToString() + "</html>");
        stw = null;
        htextw = null;
        Response.Flush();
        Response.End();

【讨论】：

您好，我遇到了同样的问题，我尝试像您一样读取丢失的 css 文件，但仍然遇到同样的错误。:(还有其他建议吗？