Check whether the loaded PDF document is edited in Blazor SfPdfViewer

17 Jul 20261 minute to read

Use the IsDocumentEdited property to determine whether the loaded PDF has unsaved changes. A document is considered edited when users modify annotations, fill form fields, add or update signatures, apply redactions, or perform other in-viewer changes. The property returns true when the document has unsaved edits.

The following example shows how to check the document’s edited status and log it to the server console.

@using Syncfusion.Blazor.SfPdfViewer
@using Syncfusion.Blazor.Buttons

<SfButton @onclick="OnClick">Check</SfButton>
<SfPdfViewer2 @ref="Viewer"
              DocumentPath="@DocumentPath"
              Height="100%"
              Width="100%">
</SfPdfViewer2>

@code{
    private SfPdfViewer2 Viewer { get; set; }
    private string DocumentPath { get; set; } = "wwwroot/Data/PDF_Succinctly.pdf";

    // Logs the document's edited status to the console.
    private void OnClick()
    {
        Console.WriteLine(Viewer.IsDocumentEdited);
    }
}

View sample on GitHub.