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RadUpload has been replaced by RadAsyncUpload, Telerik’s next-generation ASP.NET upload component. If you are considering Telerik’s Upload control for new development, check out the documentation of RadAsyncUpload or the control’s product page. If you are already using RadUpload in your projects, you may be interested in reading how easy the transition to RadAsyncUpload is and how you can benefit from it in this blog post. The official support for RadUpload has been discontinued in June 2013 (Q2’13), although it is still be available in the suite. We deeply believe that RadAsyncUpload can better serve your upload needs and we kindly ask you to transition to it to make sure you take advantage of its support and the new features we constantly add to it.

The OnClientDeleting client-side event occurs when a row is about to be deleted in response to the Remove button or a call to the deleteFileInputAt() method.

This event does not occur when selected rows are deleted in response to the Delete button or a call to the deleteSelectedFileInputs() method.

The event handler receives two parameters:

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

  2. An eventArgs parameter containing the following methods:

    • set_cancel lets you prevent the row from being deleted.

    • get_cancel returns whether the deletion has been cancelled.

    • get_fileInputField returns the file input field that is about to be deleted.

    • get_row returns the row that is about to be deleted (<LI> element)

    • get_rowIndex returns the index of the row

The following example uses the OnClientDeleting event to confirm the deletion of rows where the file input field has a selected file:

<telerik:radupload runat="server" id="RadUpload1" onclientdeleting="confirmDeletion" />
<script type="text/javascript">
    function confirmDeletion(radUpload, eventArgs) {
        var input = eventArgs.get_fileInputField();
        if (input.value.length > 0) {
            var msg = "Deleting this input means that the file '" + input.value + "' will not be uploaded. Do you want to continue?";

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