二、IE下导出Excel乱码——C#踩坑记

导出Excel在谷歌没问题，在IE下就。。。不得不吐槽，我用微软的技术导出微软的东西居然乱码，在谷歌居然不乱码。。。

解决办法：先贴高手的 https://blog.csdn.net/u014353113/article/details/84784680

 /// <summary>
        /// 通过流导出Execl文件
        /// </summary>
        /// <param name="stream">Execl流</param>
        /// <param name="fileName">导出Execl文件名（无需加扩展名）</param>
        /// <returns></returns>
        public static HttpResponseMessage ExportExecl(Stream stream, string fileName)
        {
            var file = stream;
            fileName += DateTime.Now.ToString("yyyyMMddHHmmss");
            //string csv = _service.GetData(model);
            HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
            result.Content = new StreamContent(file);
            //a text file is actually an octet-stream (pdf, etc)
            //result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");

            result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/ms-excel");
            //we used attachment to force download
            result.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment");
            result.Content.Headers.ContentDisposition.FileName = clFielName(fileName + ".xls");
            return result;
        }

/// <summary>
     /// 解决IE文件名乱码方法
     /// </summary>
     /// <param name="fileName">文件名</param>
     /// <returns></returns>
    public static string clFielName(string fileName)
     {
         System.Web.HttpContext curContext = System.Web.HttpContext.Current;
         string outputFileName = null;
         string browser = curContext.Request.UserAgent.ToUpper();
         if (browser.Contains("MS") == true && browser.Contains("IE") == true)
         {
             outputFileName = System.Web.HttpUtility.UrlEncode(fileName);
         }
         else if (browser.Contains("FIREFOX") == true)
         {
             outputFileName = """ + fileName + """;
         }
         else
         {
             outputFileName = System.Web.HttpUtility.UrlEncode(fileName);
         }
         return outputFileName;
     }