Remove specific annotation

[Nicolas NOEL]

Hello,

Is there a way to remove only a specific annotation ? By an Id or is name, or somethink ?

Actually I remove all annotation before I add new one but I would like to remove only specific annoation thas is not up to date:

I know there is this method  exist await ViewerPdf.DeleteAnnotation() but I dont understand what it does.

My code :

 await ViewerPdf.DeleteAnnotations();

 await ViewerPdf.ImportAnnotation(jsonAnnotation.GenerateStream(), AnnotationDataFormat.Json);

Thanks,

Nicolas

[Dhivyabharathi Mohan]

Hi Nicolas, 

 

In our PDF Viewer, we can get the id of the added annotation using annotationadded event and then we can delete the specific annotation by selecting the annotation using selectAnnotation(annotationId). Using deleteAnnotation method, we can delete the selected annotation as like below code snippet. We have shared the sample for your reference. 

 

 

Code snippet: 

 

 

<Syncfusion.Blazor.Buttons.SfButton OnClick="deleteAnnot"> deleteAnnotationById</Syncfusion.Blazor.Buttons.SfButton> 

 

 

<SfPdfViewer @ref="Viewer" DocumentPath="PDF_Succinctly.pdf" ServiceUrl="https://ej2services.syncfusion.com/production/web-services/api/pdfviewer" Height="500px" Width="1060px"> 

    <PdfViewerEvents AnnotationAdded="annotationAdd"></PdfViewerEvents> 

</SfPdfViewer> 

 

 

public void annotationAdd(AnnotationAddEventArgs args) 

        { 

            annotationId = args.AnnotationId; 

        } 

 

        public async void deleteAnnot() 

 

        { 

            await Viewer.SelectAnnotation(annotationId); 

            await Viewer.DeleteAnnotation(); 

        } 

 

 

 

Sample: 

 

https://www.syncfusion.com/downloads/support/directtrac/general/ze/TestApp-1324977826  

 

 

Kindly try it and revert us, if you have any concerns. 

 

 

Regards, 

Dhivya. 

[Nicolas NOEL]

Hello

Thank you 

Nicolas