Can we have DisallowedFileExtensions?

[Lenny_shp]

I just wanted to exclude .exe, .com., .bat., zip but allow most of extensions.   With .xsl becoming .xslm, .xslx it is a bit of a maintenance to keep adding to the AllowedFileExtensions.

[Princy]

Hello Lenny,

Check the following forum thread which shows how to achieve the client side file-extension validation.
DisAllowedMimeTypes and DisAllowedFileExtensions

Thanks,
Princy.

[Dimitar Terziev]

Hi Leonid,

In general there is no build in functionality for setting not allowed files extensions. You could however try to manually filter the files and cancel the upload if a file with specific extension is being uploaded. In order to achieve this you should subscribe on the client-side OnClientFileUploading event and use the following implementation of the event handler function:

<script type="text/javascript">

    function OnClientFileUploading(sender, args) {

        var fileName = args.get_fileName();
        var fileExtension = fileName;

        var lastIndex = fileName.lastIndexOf('.');
        fileExtension = fileName.substring((lastIndex + 1), (fileName.length));

        if (fileExtension == "zip") {

            args.set_cancel(true);
        }
    }
</script>

The above suggested solution will not upload files with zip extension.

Best wishes,
Dimitar Terziev
the Telerik team