Move the scrollbar to the exact location of annotations

20 Jun 20231 minute to read

The Syncfusion’s Blazor SfPdfViewer component allows you to move the scrollbar to the exact location of annotations present in a loaded PDF document using the GoToBookmarkAsync() method.

The following code example shows how to move the scrollbar to annotation location.

@using Syncfusion.Blazor.SfPdfViewer

<button @onclick="navigate">Navigation</button>

<SfPdfViewer2 @ref="PdfViewer" DocumentPath="@DocumentPath">
    <PdfViewerEvents DocumentLoaded="DocumentLoad"></PdfViewerEvents>

@code {
    SfPdfViewer2 PdfViewer;
    public string DocumentPath { get; set; } = "wwwroot/data/PDF Succinctly.pdf";
    public Dictionary<int, System.Drawing.SizeF> pageSize { get; set; }

    private void DocumentLoad(LoadEventArgs args)
        pageSize = args.PageData.PageSizes;

    private async void navigate()
        var annotationCollection = await PdfViewer.GetAnnotationsAsync();
        var pageNumber = (annotationCollection[0].PageNumber);
        var Y = annotationCollection[0].Bound.Top;
        await PdfViewer.GoToBookmarkAsync(pageNumber, (pageSize[pageNumber].Height - Y));


View sample in GitHub.