前端代码：
<a id="upload" href="@Url.Content("~/goods/DownLoadGoodsVideo?n_name={文件旧名称}&o_name={文件新名称}”)" target="_blank">【点击下载】</a>
后端代码：
[HttpGet] public void DownLoadGoodsVideo(string n_name,string o_name) { if (!string.IsNullOrEmpty(n_name)) { HttpResponse response = System.Web.HttpContext.Current.Response; string path = System.Web.HttpContext.Current.Server.MapPath(@"~\\UploadFile\\" + n_name); FileInfo fi = new FileInfo(path); if (fi.Exists) { response.Clear(); response.AddHeader("Content-Disposition", "attachment; filename=" + System.Web.HttpContext.Current.Server.UrlEncode(o_name)); response.AddHeader("Content-Length", fi.Length.ToString()); response.ContentType = "application/octet-stream"; response.Filter.Close(); response.WriteFile(fi.FullName); response.End(); } else { response.Status = "404 File Not Found"; response.StatusCode = 404; response.StatusDescription = "File Not Found"; response.Write("File Not Found"); response.End(); } } }
