AjaxUploader
Multiple file uploads Drag and drop MIME validation

Getting Started

1Overview 2Minimal Setup 3Configuration 4Server Controls 5JavaScript API

Basic Upload

6Single File 7Multiple Files 8Auto Upload 9Manual Upload 10Custom Button 11Upload With Form 12Programmatic Upload 13Pre-loaded Files

Validation

14File Extensions 15Max Size 16Min Size 17MIME Type 18Max Count 19Client Validation 20Server Validation 21Image Dimensions 22Duplicate Detection 23Combined Rules

Appearance

24Default 25Bootstrap 26Tailwind 27Dark Mode 28Custom Colors 29Custom Button 30Icon-Only 31Compact 32Full-Width 33Animations

Progress

34Progress Lab 35Percentage 36Speed & ETA 37Circular 38Striped Bar 39Per-File 40Aggregate 41Custom UI

Drag and Drop

42Basic Drop Zone 43Full Page 44Styled 45Preview 46Multiple Zones 47Folder Upload 48Drop + Browse 49Overlay

Chunked Upload

50Basic Chunked 51Custom Chunk Size 52Resume 53Parallel Chunks 54Large File 1GB+ 55Retry 56SSE Progress 57Chunk Visualization

Queue

58Sequential 59Concurrent 60Reorder 61Pause/Resume 62Cancel 63Priority

Events

64All Events 65Server Events 66Filter OnSelect 67Custom Progress 68Redirect 69Error Recovery 70Event Log

Image Handling

71Preview 72Thumbnail Grid 73Crop 74Resize 75EXIF 76Gallery 77Avatar 78Metadata

Custom UI

79External Trigger 80External Progress 81Custom Table 82Card List 83Inline 84Modal 85Wizard

Integration

86Complex Form 87Email Attachments 88Data Table 89Chat 90CMS Media 91E-Commerce 92Support Ticket 93Multi-Step

Security

94Antiforgery 95Authenticated 96Role-Based 97Virus Scan 98Rate Limiting

Advanced

99SQL Server Provider 100Custom Provider

Clipboard

101Paste Upload

Overview

AjaxUploader is a feature-rich upload control for ASP.NET Web Forms.

It supports multiple files, drag and drop, chunked uploads, image handling, clipboard paste, and deep UI customization. Here is a quick taste of what it can do.

Multiple Files

Upload many files at once with progress tracking per file.

Drag & Drop

Drag files from the desktop directly onto the page to upload.

Chunked Upload

Split large files into smaller chunks for reliable transfer.

Image Preview

Show thumbnails before uploading images.

Clipboard Paste

Paste images from the clipboard to upload instantly.

Validation

Validate file types, sizes, dimensions, and counts.

Try It Out

Live uploader preview

This is a real AjaxUploader control rendered directly on the overview page so the demo feels like the CoreUpload overview layout, but for Web Forms.

Open full demo page
Drag & drop files here, or paste from clipboard
<au:AjaxFileUpload ID="OverviewUploader" runat="server"
    AllowMultiple="true"
    AllowedExtensions=".jpg,.png,.gif,.pdf,.doc,.docx,.zip"
    MaxFileSize="10MB"
    AutoUpload="true"
    ShowProgress="true"
    EnableDropZone="true"
    ShowThumbnails="true" />