Download A File With Mvc

I need to allow the user on my site to download a file (xml File) I tried public FileResult DownloadFile(string fileid) { if (!string.IsNullOrEmpty(fileid)) {

Solution 1:

Does it have to be done using ajax? Maybe you could open another window with the file generation address and let the browser do the job:

function downloadFile(id) {

    window.open(sitePath + "Controller/DownloadFile?fileid=" + id, '_blank');

}

Solution 2:

You can't use ajax post to download a file. It cannot save files directly into user's machine. The ajax post would get the response in raw format but it won't be a file.

Just use

function downloadFile(id) {
     window.location = "/Controller/DownloadFile?fileid=" + id;
}

Solution 3:

it is very simple

make link

 <a href="/Home/preview?id=Chrysanthemum.jpg"  > Download File</a>

and your controller

 public ActionResult preview(string id)  
        {

            string Filename = Path.GetFileName(@id);
            string location = id;
            try
        {
            if (System.IO.File.Exists(location))
            {

                FileStream F = new FileStream(@location, FileMode.Open, FileAccess.Read, FileShare.Read);
                return File(F, "application/octet-stream", Filename);
            }

        }
        catch (IOException ex)
        {


        }
        return View();
    }

Solution 4:

Here is a way I accomplish downloading, hope that helps.

$.ajax({
            url: sitePath + "Controller/DownloadFile?fileid=" + id,
            type: 'GET',
            success: function (filename) { //I return the filename in from the controller
                frame = document.createElement("iframe");
                frame.id = "iframe";
                frame.style.display = 'none';
                frame.src = '/FileDirectory?fileName=' + filename; //the path to the file
                document.body.appendChild(frame);
            },
            cache: false,
            contentType: false,
            processData: false
        });