Duplicate File Detection

Prevent users from uploading the same file twice using EnableDuplicateCheck="true". Use DuplicateHashAlgorithm to specify the hashing method for content-based detection.

Drag & drop files here, or paste from clipboard

<au:AjaxFileUpload ID="Uploader1" runat="server"
    AllowMultiple="true"
    EnableDuplicateCheck="true"
    DuplicateHashAlgorithm="sha256"
    ButtonText="Select Files"
    AutoUpload="true"
    ShowProgress="true" />

Try selecting the same file twice to see it detected as a duplicate.