OnClientFilesSelecting

The OnClientFilesSelecting occurs when the files are just about to be processed.

The event handler receives two parameters:

1. The instance of the RadCloudUpload control firing the event.

2. An eventArgs parameter containing the following methods:

• get_count returns the count of the selected files.

• set_cancel lets you cancel the event and prevent items from being uploaded

<telerik:RadCloudUpload runat="server" ID="RadCloudUpload1" OnClientFilesSelecting="onClientFilesSelecting" MultipleFileSelection="Automatic" ...>
</telerik:RadCloudUpload>

function onClientFilesSelecting(sender, eventArgs) {
    eventArgs.set_cancel(true);
}