文件下载 文件名乱码问题解决

.NET中可通过以下函数实现文件的下载：

 

 

        /// <summary>
        /// 下载文件
        /// </summary>
        /// <param name="filePath">文件路径</param>
        /// <param name="fileName">文件名</param>
        public static void DownloadFile(string filePath, string fileName)
        {
            if (!File.Exists(filePath))
            {
                throw new FileNotFoundException();
            }

            FileInfo info = new FileInfo(filePath);
            long fileSize = info.Length;
            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.ClearHeaders();
            HttpContext.Current.Response.Buffer = false;
            HttpContext.Current.Response.Charset = "GB2312";
            HttpContext.Current.Response.ContentType = "application/octet-stream";
            HttpContext.Current.Response.AddHeader("Content-Disposition", "attachement;filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8).ToString());

            // 指定文件大小  
            HttpContext.Current.Response.AddHeader("Content-Length", fileSize.ToString());
            HttpContext.Current.Response.WriteFile(filePath, 0, fileSize);
            HttpContext.Current.Response.Flush();
            HttpContext.Current.Response.End();
            HttpContext.Current.Response.Close();
        }

 

这里要注意

HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8).ToString()这句，如果直接在这里传入fileName在IE中下载的文件名会乱码。