Mehul Harry's DevExpress Blog

Check out the new 'Download File' feature of our slick ASP.NET File Manager that's available now in DXperience v2011.1 release:

Download Selected File

With the next major release, your end-users will have the ability to download a selected file from the User Interface of the ASPxFileManager!

New Toolbar Button

A new toolbar item has been introduced: the Download button. It's hidden by default and to show it, just set:

SettingsToolbar.ShowDownloadButton = true

New Client-Side API

A new client-side method and event have been added to help you with the download file feature:

The new client-side method, ASPxClientFileManager.Download, helps you to invoke the selected file download. For example, you can call it from an external button like so:

ASPxClientFileManager.GetSelectedFile().Download();

There's also a new client-side event called FileDownloading which helps you to add things like a confirmation dialog:

FileDownloading="function(s, e) {
    e.cancel = !confirm('Are you sure you want to download ' + e.file.name + ' ?');
}"

New Server-Side Event

A new server-side event called FileDownloading has been added. The new event helps you work with the file stream. For example, you can use this server-side event to add a watermark to the downloaded image files:

// Arguments members:
// FileManagerFile File
// Stream InputStream - stream of file from file system
// Stream OutputStream - is null, but you can set new stream (replace original input stream) for downloading
// bool Cancel
           
// For example:

protected void ASPxFileManager1_FileDownloading(object source, DevExpress.Web.ASPxFileManager.FileManagerFileDownloadingEventArgs e) {
    if (IsImageExtension(e.File.Extension))
        e.OutputStream = AddWatermarkToImage(e.InputStream);
}

Part of v2011 vol 1

The new 'Download File' feature of our ASP.NET File Manager is available now with DXperience v2011 volume 1 release.

What do you think of the new download file feature?

Drop me a line below with your thoughts. Thanks.