ASP MVC下载Zip文件 [英] ASP MVC Download Zip Files

问题描述

我已经在这里我把事件的ID，然后我可以下载所有该事件的照片的图.....
这里是我的code

i have a view where i put the id of the event then i can download all the images for that event..... here's my code

[HttpPost]
    public ActionResult Index(FormCollection All)
    {
        try
        {
            var context = new MyEntities();

            var Im = (from p in context.Event_Photos
                      where p.Event_Id == 1332
                      select p.Event_Photo);

            Response.Clear();

            var downloadFileName = string.Format("YourDownload-{0}.zip", DateTime.Now.ToString("yyyy-MM-dd-HH_mm_ss"));
            Response.ContentType = "application/zip";

            Response.AddHeader("content-disposition", "filename=" + downloadFileName);

            using (ZipFile zipFile = new ZipFile())
            {
                zipFile.AddDirectoryByName("Files");
                foreach (var userPicture in Im)
                {
                    zipFile.AddFile(Server.MapPath(@"\") + userPicture.Remove(0, 1), "Files");
                }
                zipFile.Save(Response.OutputStream);

                //Response.Close();
            }
            return View();
        }
        catch (Exception ex)
        {
            return View();
        }
    }

问题是，每次我得到的HTML网页，下载，所以不是下载Album.zip我得到Album.html任何想法???

The problem is that each time i get html page to download so instead of downloading "Album.zip" i get "Album.html" any ideas???

推荐答案

在MVC，而不是返回一个观点，如果你想返回一个文件，你可以返回这是一个的ActionResult 这样做：

In MVC, rather than returning a view, if you want to return a file, you can return this as an ActionResult by doing:

return File(zipFile.GetBytes(), "application/zip", downloadFileName);
// OR
return File(zipFile.GetStream(), "application/zip", downloadFileName);

办与手动写入输出流，如果你使用MVC不乱。

Don't mess about with manually writing to the output stream if you're using MVC.

我不知道如果你能得到的字节或从的ZipFile 类流虽然。或者，您可能希望它写它的输出到的MemoryStream ，然后返回：

I'm not sure if you can get the bytes or the stream from the ZipFile class though. Alternatively, you might want it to write it's output to a MemoryStream and then return that:

 var cd = new System.Net.Mime.ContentDisposition {
     FileName = downloadFileName,
     Inline = false, 
};
Response.AppendHeader("Content-Disposition", cd.ToString());
var memStream = new MemoryStream();
zipFile.Save(memStream);
memStream.Position = 0; // Else it will try to read starting at the end
return File(memStream, "application/zip");

和利用这一点，你可以删除在你正在做的响应什么都行。无需清除或的AddHeader 。

And by using this, you can remove all lines in which you are doing anything with the Response. No need to Clear or AddHeader.

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