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PdfViewer.Select(PdfDocumentPosition, PdfDocumentPosition) Method

Selects the textual content located at the specified position.

Namespace: DevExpress.XtraPdfViewer

Assembly: DevExpress.XtraPdfViewer.v22.2.dll

NuGet Package: DevExpress.Win.PdfViewer


public void Select(
    PdfDocumentPosition startPosition,
    PdfDocumentPosition endPosition


Name Type Description
startPosition PdfDocumentPosition

A PdfDocumentPosition value, specifying the starting position in the document.

endPosition PdfDocumentPosition

A PdfDocumentPosition value, specifying the ending position in the document.


The overloaded Select method uses the page coordinate system. See the Coordinate Systems topic to learn more.

If the part of the image is located between the specified positions, the method selects nothing.

bool mouseButtonPressed = false;
PdfDocumentPosition startPosition;
PdfDocumentPosition endPosition;

void pdfViewer1_MouseDown(object sender, MouseEventArgs e)
    if (e.Button == MouseButtons.Left)
       //Retrieve the cursor's initial position
        startPosition = pdfViewer1.GetDocumentPosition(e.Location);
        endPosition = null;
        mouseButtonPressed = true;

void pdfViewer1_MouseMove(object sender, MouseEventArgs e)
    if (mouseButtonPressed)
        //Obtain the cursor's final position
        endPosition = pdfViewer1.GetDocumentPosition(e.Location);

void pdfViewer1_MouseUp(object sender, MouseEventArgs e)
    mouseButtonPressed = false;
    if (startPosition == null || endPosition == null)
    var start = pdfViewer1.GetClientPoint(startPosition);
    var end = pdfViewer1.GetClientPoint(endPosition);

    //Select the content between two positions
    pdfViewer1.Select(startPosition, endPosition);
    PdfSelectionContent content = pdfViewer1.GetSelectionContent();

    //If the selection contains text, copy it to Clipboard
    if (content.ContentType == PdfSelectionContentType.Text)
    MessageBox.Show("The selection is copied to Clipboard");
See Also