How to download multiple byte arrays?

Asked Nov 29 '18 at 05:33

Active Nov 29 '18 at 05:37

Viewed 222 times

According to this answer, we could use something like:

public FileResult Download()
{
    byte[] fileBytes = System.IO.File.ReadAllBytes(@"c:\folder\myfile.ext");
    string fileName = "myfile.ext";
    return File(fileBytes, System.Net.Mime.MediaTypeNames.Application.Octet, fileName);
}

..to download a file.

In my case, I have to download multiple files.
For example,

foreach(int _id in idArray)
{
    byte[] file = //..... generate file using _id
    MemoryStream ms = new MemoryStream();
    ms.Write(file, 0, file.Length);
    ms.Position = 0;

    return File(ms, "application/pdf", myFileName);
}

But this code downloads only the first file.
According to this answer, we could generate a zip achieved for multiple files.
But in my scenario, I have to download the files separately. How should I change my code to download multiple files?

edited Nov 29 '18 at 05:37

41686d6564 stands w. Palestine

19,168
12
41
79

asked Nov 29 '18 at 05:33

Steven Sann

You are `return`ing in the first iteration, and therefore, the method exits in the first iteration no matter how many items are in the array. Instead, you can add the results to a list and return the list. – 41686d6564 stands w. Palestine Nov 29 '18 at 05:36
@AhmedAbdelhameed, yes, I thought so. How can I add generated files to List and download separately ?? can you provide me with code ?? – Steven Sann Nov 29 '18 at 05:39
You need to learn the basics and try something for yourself. SO is not a coding service – jazb Nov 29 '18 at 05:41
@JohnB , sure, the example code is what I have tried. – Steven Sann Nov 29 '18 at 05:43
`?? can you provide me with code ??` – jazb Nov 29 '18 at 05:45
You need to use separate action methods for each files, and trigger them separately by returning a page containing anchor links which pointed to action methods as mentioned before. – Tetsuya Yamamoto Nov 29 '18 at 05:45
@JohnB , sure . I mean to modify my code which is work to download the rest files :) – Steven Sann Nov 29 '18 at 05:49

How to download multiple byte arrays?

0 Answers0