Last Updated: 10 Jun 2021 18:10 by ADMIN
Created on: 21 Jan 2013 10:30
Category: AsyncUpload
Type: Feature Request
ADD: ability to Drag and drop files and messages directly from OutLook to RadAsyncUpload

Peter Milchev
Posted on: 08 Oct 2020 16:17

Hello all,

As per Amish's reply, you can see that a possible workaround for the "delete" issue is the dropEffect to be set to "copy" in the dropover event:

    // apply to all RadAsyncUpload controls on the page
    function pageLoadHandler() {
        $telerik.$(".RadAsyncUpload").each(function (ind, el) {
            var au = el.control;
            if (au.get_loadedModuleName().toLowerCase() == "file api") {
                au._uploadModule._dropoverHandler = function (ev) {
                    var dt = ev.originalEvent.dataTransfer;
                    dt.dropEffect = "copy";
                    // we need to call prevent default, otherwise
                    // the browser will try to open the document (by default)


        // Sys.Application.remove_load(pageLoadHandler);  
<telerik:RadAsyncUpload runat="server" ID="RadAsyncUpload1"></telerik:RadAsyncUpload>

Peter Milchev
Progress Telerik

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Peter Milchev
Posted on: 06 Feb 2020 13:45

Hello all,

I will try to summarize and add recent news.

Microsoft has a bug report where the drag of the messages to any non-Microsoft browser (meaning Internet Explorer or old Edge) is not supported:

Nevertheless, you might see this "working" in new versions of Google Chrome and the new Edge. This is due to some commits that Microsoft made to the Chromium core, which will be used in the new Chromium-based Edge browser.

The glitch with this implementation is that the dragged message will be uploaded properly in the browser but it will be moved to the Deleted folder in Outlook.

With that said, we might need to wait for Microsoft and Chromium teams to implement the correct message upload and then the AsyncUpload might be able to properly handle the message drag and drop directly from outlook.

In the meantime, the only tested cross-browser solution is to drag the message/attachment on the file system and then upload the files.

Peter Milchev
Progress Telerik

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Posted on: 18 Apr 2019 16:16
This is working with Edge, would be nice to make it work with IE and Chrome.
Svyatoslav Isayev
Posted on: 07 May 2016 16:07
That would be a great feature!
Posted on: 15 Apr 2016 07:04
The issue seems to be a Microsoft limitation and it is marked as Won't fix in their tracking system here-
Posted on: 11 Apr 2016 16:38
Our customers are asking for this.
Posted on: 11 Mar 2016 16:48
This is definitely a limitation of Outlook. There are a a couple of utilities on the market to let you do this though eg. Outlook2Web ( http://www.outlook2web.com/ ) and Mail2Share (http://www.mail2share.ca/en/ ) (works to Sharepoint only)
Posted on: 05 Aug 2015 01:35
It would be nice to have a drag and drop feature from Outlook to the file upload for email attachments.  I have had several requests for this.  
Posted on: 04 May 2015 13:00
I spent countless hours trying to get this to work with a web application. Definitely a need!
Posted on: 04 May 2015 11:23
This would be very useful.  Thanks.
Genady Sergeev
Posted on: 12 Sep 2013 13:39
Hi guys,

Unfortunately the current level of technologies makes implementing this feature impossible because the browsers don't treat mails dragged from outlook as files. If this behavior changes in the future we will add support for it.

Telerik team
Posted on: 08 Aug 2013 20:21
Bob's suggestion that this limitation is imposed by Outlook seems to be true. Limited testing shows that other HTML5 upload widgets (e.g. in gmail) don't accept attachments dragged directly from Outlook.  Here's a possible reason: http://stackoverflow.com/a/17197224/1058320
Posted on: 31 Jul 2013 21:59
Isn't this a limitation of the drop target that Outlook is allowing and not an issue with RadAsyncUpload on HTML5 browsers?

I think that Outlook is the issue here?  Any other thougths on this?
Rick Atkinson
Posted on: 17 Jul 2013 19:13
This would be very useful.  Thanks.
Posted on: 11 Jul 2013 20:31
Very well needed feature
Posted on: 23 May 2013 18:33
We have a requirement where the business is asking us to provide the Drag and Drop functonality from Outlook to the web or windows applicaiton. It seems like there is a huge demand for this with a lot of other organizations. 

It can be a very good selling feature for Telerik as well!!!$$$
Posted on: 22 May 2013 18:39
I agree with the previous comments
Posted on: 09 May 2013 18:07
We could use this feature as well.
Posted on: 25 Apr 2013 15:59
This would be a great addition to allow people to add emails to a web page easily.