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解决导出为Excel时文件名乱码的问题。

   以前代码：
public static void htmlToExcel(HttpContext context, string title, string html, string fileCss = "", string SheetName = "")
        {
            var Response = context.Response;
            string html1 = html;
            Response.ContentType = "application/force-download";         

            Response.AddHeader("content-disposition", "attachment; filename=" + title + ".xls");
            Response.Write("<html xmlns:x="urn:schemas-microsoft-com:office:excel">");
            Response.Write("<head>");
            Response.Write("<META http-equiv="Content-Type" content="text/html; charset=utf-8">");

            if (fileCss != "")
            {
                string cssText = string.Empty;
                StreamReader sr = new StreamReader(fileCss);
                var line = string.Empty;
                while ((line = sr.ReadLine()) != null)
                {
                    cssText += line;
                }
                sr.Close();
                Response.Write("<style>" + cssText + "</style>");
            }

            Response.Write("<!--[if gte mso 9]><xml>");
            Response.Write("<x:ExcelWorkbook>");
            Response.Write("<x:ExcelWorksheets>");
            Response.Write("<x:ExcelWorksheet>");
            if (!Exec.IsNullOrEmpty(SheetName))
            {
                Response.Write("<x:Name>" + SheetName + "</x:Name>");
            }
            else
            {
                Response.Write("<x:Name>Report Data</x:Name>");
            }

            Response.Write("<x:WorksheetOptions>");
            Response.Write("<x:Print>");
            Response.Write("<x:ValidPrinterInfo/>");
            Response.Write("</x:Print>");
            Response.Write("</x:WorksheetOptions>");
            Response.Write("</x:ExcelWorksheet>");
            Response.Write("</x:ExcelWorksheets>");
            Response.Write("</x:ExcelWorkbook>");
            Response.Write("</xml>");
            Response.Write("<![endif]--> ");
            Response.Write(html1);//HTML
            Response.Flush();
            Response.End();
        }

   public static void htmlToExcel(HttpContext context, string title, string html, string fileCss = "", string SheetName = "")
        {
            var Response = context.Response;
            string html1 = html;
            Response.ContentType = "application/force-download";

            title = HttpUtility.UrlEncode(title, System.Text.Encoding.GetEncoding("UTF-8"));

            Response.AddHeader("content-disposition", "attachment; filename=" + title + ".xls");
            Response.Write("<html xmlns:x="urn:schemas-microsoft-com:office:excel">");
            Response.Write("<head>");
            Response.Write("<META http-equiv="Content-Type" content="text/html; charset=utf-8">");

            if (fileCss != "")
            {
                string cssText = string.Empty;
                StreamReader sr = new StreamReader(fileCss);
                var line = string.Empty;
                while ((line = sr.ReadLine()) != null)
                {
                    cssText += line;
                }
                sr.Close();
                Response.Write("<style>" + cssText + "</style>");
            }

            Response.Write("<!--[if gte mso 9]><xml>");
            Response.Write("<x:ExcelWorkbook>");
            Response.Write("<x:ExcelWorksheets>");
            Response.Write("<x:ExcelWorksheet>");
            if (!Exec.IsNullOrEmpty(SheetName))
            {
                Response.Write("<x:Name>" + SheetName + "</x:Name>");
            }
            else
            {
                Response.Write("<x:Name>Report Data</x:Name>");
            }

            Response.Write("<x:WorksheetOptions>");
            Response.Write("<x:Print>");
            Response.Write("<x:ValidPrinterInfo/>");
            Response.Write("</x:Print>");
            Response.Write("</x:WorksheetOptions>");
            Response.Write("</x:ExcelWorksheet>");
            Response.Write("</x:ExcelWorksheets>");
            Response.Write("</x:ExcelWorkbook>");
            Response.Write("</xml>");
            Response.Write("<![endif]--> ");
            Response.Write(html1);//HTML
            Response.Flush();
            Response.End();
        }

　　给文件名通过转码的方式进行导出。

参考：http://blog.csdn.net/tongxinxiao/article/details/43733881

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原文地址：https://www.cnblogs.com/axu92312/p/8242037.html