[Solved] Custom column command resulting in file download

[Sam]

Hi,

I have a grid which uses a custom column command to send an AJAX request to the server, which I then want to return a file that the browser will prompt the user to download.

I have this:

public ActionResult GetDocument(String path)
{
    var documentStream = _customContext.GetFile(path);
    var mimeType = "application/octet-stream";
 
    return File(documentStream, mimeType, "TestDocument.txt");
}

But this causes a script error in the grid. Does anyone know how I can do what I'm trying to accomplish?

Thanks for any help.

[Sam]

Any help is really appreciated...

[Dadv]

I don't think you could do that in Ajax mode, but if the result is a stream, using server side could fix that.

 columns.Command(commands => commands
                    .Custom("Download")
                    .Text("Download")
                    .DataRouteValues(route => route.Add(o => o.Url).RouteKey("Url"))
                    .Action("GetDocument", "Grid")).Width(150);

[Sam]

I need this to work through AJAX.

If the grid can not support it directly, I can alternatively send the contents of the file back as a byte array, and then manipulate that in a Javascript function. The issue with this is that I don't know how / or if it's possible to initiate a file download using the contents of a Javascript array.

Any suggestions/ideas?

[Dadv]

it was misunderstood, you could have your grid in ajax mode (select, edit, etc..) but you didn't need to have the command in Ajax.

What you want is when you press a button, a file is download, exact ? 

then my code is good for you (test it...) , it work for me.

The only thing you need to be aware is to perhaps encode the path in URL mode (because it is send in GET if your form is in ajax mode).

Also you can change you controller code like this :

public ActionResult GetDocument(String path)
{
    var documentStream = _customContext.GetFile(path);
 
    return File(documentStream, System.Net.Mime.MediaTypeNames.Application.Octet, "TestDocument.txt");
}

Regards,

[Sam]

Thanks, this worked.

It still kind of sucks that the entire page has to be submitted, but at least it's working.