Question

A little background. I am using plupload to upload files within my application.

The url passed is the url to my aspx where I handle all the processing of the file.

What happens is, the first time you browse for and select a file nothing happens. The second time, it posts back both form submissions immediately.

Can you find any glaring omissions from the below code?

// Initialize the uploader
uploader = new plupload.Uploader({
                    runtimes: 'html5,gears,flash,silverlight,browserplus',
                    browse_button: 'browse',
                    drop_element: 'uploadContainer',
                    container: 'uploadContainer',
                    max_file_size: '10mb',
                    multi_selection: false,
                    url: 'someURLHere',
                    filters: [{ title: "Pdf files", extensions: "pdf"}]
                });

FilesAdded event fires when (obviously) a file is added

// File Added event 
uploader.bind('FilesAdded', function (up, files) {
                    $.each(files, function (i, file) {
                        // Add element to file object
                        file.formattedSize = plupload.formatSize(file.size);

                    $('form').submit();

                    // Reposition Flash/Silverlight
                    up.refresh();
                });

Submit the form

$('form').submit(function (e) {
                    uploader.start();
                    e.preventDefault();
                });

HTML

<form id="uploadForm">
   <div id="uploadContainer">
     <span id="uploadDragText" style="display: none;">Drag and Drop items here</span
     <div id="fileList"></div>
     <button id="browse" class="ButtonSubmit">Browse...</button> 
   </div>
</form>

I was using this great answer as a starting point. using Plupload with ASP.NET/C#

Answer 1

The fix to this is actually very simple.

I needed to init() the uploader BEFORE I bound any events to it, as the init() actually binds some default handlers.

// Initialize the uploader
uploader = new plupload.Uploader({
                    runtimes: 'html5,gears,flash,silverlight,browserplus',
                    browse_button: 'browse',
                    drop_element: 'uploadContainer',
                    container: 'uploadContainer',
                    max_file_size: '10mb',
                    multi_selection: false,
                    url: 'someURLHere',
                    filters: [{ title: "Pdf files", extensions: "pdf"}]
                });


   uploader.init();

   // Then add in any of your event handlers.