ASP.NET MVC5 launch dynamic file download from jQuery by passing arguments

Question

In asp mvc 5, I launch a download with that code:

//jQuery
 $(document).on('click', "#download_export", function (e) {
        window.location = url_download;
    });

//c#
 public FileResult GetFile()
        {
            return File(Encoding.UTF8.GetBytes("dfdfdf dfssdfdfs"),
                   "text/plain",
                    "test.txt");
        }

It works and trigger a txt file download on client browser.

I want to do same thing by passing file content on argument from controller,

I tried:

    $(document).on('click', "#download_export", function (e) {
     $.get(url_download,
            {
                content : 'this is my content'
            }
            , function (data) {
                     console.log('works')
        });
   });

 public FileResult GetFile(string content)
        {
            return File(Encoding.UTF8.GetBytes(content),
                   "text/plain",
                    "test.txt");
        }

I saw with debugger that Action is reached but it doesn't trigger a download,

Do you have idea how to do it?

Here - public FileResult GetFile(string content) - what is the value of content when you debug? — Leron
– Leron, Commented Apr 11, 2015 at 12:50

Khanh TO · Accepted Answer · 2015-04-11 12:51:31Z

1

I'm afraid that you cannot download files with ajax. Due to security reason, javascript is not allowed to access local files system. Imagine a case where js from a remote site tries to steal files on your pc.

Try:

$(document).on('click', "#download_export", function (e) {
        window.location = url_download + "?content=this is my content";
    });

Or you can create a hidden iframe on the page to download the file to avoid changing location of current window.

$(document).on('click', "#download_export", function (e) {
            $("#yourIframe").attr("src",url_download + "?content=this is my content");
        });

answered Apr 11, 2015 at 12:51

Khanh TO

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Comments

Maris · Accepted Answer · 2015-04-11 12:57:26Z

0

If you want a dynamic download then you can use -> $.filedownload jquery plugin for those purposes. Simple usage:

var promise = $.fileDownload(url_download+"?content=yourContentHere");

answered Apr 11, 2015 at 12:57

Maris

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