C#文件上传与下载的实现方法

本文实例为大家分享了C#实现文件上传与下载的具体代码，供大家参考，具体内容如下

C#实现文件上传代码：

public ActionResult Upload()
   {
     // var pathUrl = "http://" + Request.Url.Authority;
     var file = Request.Files["Filedata"];

var uploadFileName = file.FileName;

string filePath = "/File/" + uploadFileName;
     string AbsolutePath = Server.MapPath(filePath);
     file.SaveAs(AbsolutePath);       //将上传的东西保存    
     return Json(new { FileName = uploadFileName, FilePath = filePath });

}

C#实现文件下载功能：

public ActionResult DownLoad(string FileName)
   {
     string fileName = FileName;//客户端保存的文件名
     string filePath = Server.MapPath("/File/"+ FileName);//路径    
                                //以字符流的形式下载文件  
     FileStream fs = new FileStream(filePath, FileMode.Open);
     byte[] bytes = new byte[(int)fs.Length];
     fs.Read(bytes, 0, bytes.Length);
     fs.Close();
     Response.ContentType = "application/octet-stream";

//通知浏览器下载文件而不是打开  
     Response.AddHeader("Content-Disposition", "attachment; filename=" + HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8));
     Response.BinaryWrite(bytes);
     Response.Flush();
     Response.End();
     return Json("");
   }

来源：http://www.cnblogs.com/stubborn-donkey/archive/2017/08/29/7446720.html