Concurrent Uploads

Parallel Upload Slots

Upload multiple files simultaneously with configurable concurrency. Three parallel upload slots allow faster overall completion while limiting server load.

Drag & drop files here, or paste from clipboard
<au:AjaxFileUpload ID="Uploader1" runat="server"
    AllowMultiple="true"
    ConcurrentUploads="3"
    AutoUpload="true"
    ShowProgress="true" />

// JavaScript API approach
AjaxUploader.create('#uploader', {
    uploadUrl: '/ajaxupload.axd/upload',
    multiple: true,
    maxFiles: 10,
    concurrency: 3, // 3 parallel upload slots
    autoUpload: true,
    onQueueRender: function(queue) {
        // Show active uploads in parallel slots
    }
});