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V24.2

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PdfPageFacade.ClearContent(PdfRectangle, Boolean, PdfClearContentOptions) Method

Clears the document content located in the specified rectangle. Allows you to specify whether to use the page coordinate system, and what content type to keep.

Namespace: DevExpress.Pdf

Assembly: DevExpress.Pdf.v24.2.Core.dll

NuGet Package: DevExpress.Pdf.Core

#Declaration

public void ClearContent(
    PdfRectangle rect,
    bool usePageCoordinateSystem,
    PdfClearContentOptions options
)

#Parameters

Name Type Description
rect PdfRectangle

A page rectangle to clear.

usePageCoordinateSystem Boolean

true to use the page coordinate system; otherwise, false.

options PdfClearContentOptions

An object that contains clear content options.

#Remarks

The code sample below removes only text in the upper half of the first page:

result

using (PdfDocumentProcessor pdfDocumentProcessor = new PdfDocumentProcessor())
{
    pdfDocumentProcessor.LoadDocument("Document.pdf");
    PdfPageFacade pageFacade = pdfDocumentProcessor.DocumentFacade.Pages[0];

    PdfRectangle cropBox = pdfDocumentProcessor.Document.Pages[0].CropBox;
    double halfPage = cropBox.Top / 2;

    PdfRectangle pageRectangle = new PdfRectangle(cropBox.Left, halfPage, cropBox.Right + halfPage, cropBox.Top);

    PdfClearContentOptions options = new PdfClearContentOptions()
    {
      ClearAnnotations = false,
      ClearGraphics = false, 
      ClearImages = false
    };

    // Clear the page area
    pageFacade.ClearContent(pageRectangle, true, options);

    pdfDocumentProcessor.SaveDocument("Document_cleared.pdf");
}
See Also