SetOCGViewState Method (GdPicturePDF)
Sets up the value of the View state setting of an optional content group specified by its unique identifier.
The View state indicates the onscreen visibility, that means if the content of this group is viewable.
Parameters
- OCGId
- The unique identifier of the required OCG entry. You can obtain this identifier using the GdPicturePDF.GetOCG method.
- ViewState
- A member of the PdfOcgState enumeration. The new value of the View state setting to be used for the specified optional content group.
Return Value
A member of the GdPictureStatus enumeration. If the method has been successfully followed, then the return value is GdPictureStatus.OK.
We strongly recommend always checking this status first.
How to enable the View state setting for the specified layer in the PDF document.
Dim caption As String = "Example: SetOCGViewState"
Dim gdpicturePDF As New GdPicturePDF()
If (gdpicturePDF.NewPDF() = GdPictureStatus.OK) AndAlso
(gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) = GdPictureStatus.OK) Then
Dim image_res_name As String = gdpicturePDF.AddJpegImageFromFile("image.jpg")
Dim status As GdPictureStatus = gdpicturePDF.GetStat()
If status = GdPictureStatus.OK Then
Dim ocgID As Integer = gdpicturePDF.NewOCG("Image layer")
status = gdpicturePDF.GetStat()
If (status = GdPictureStatus.OK) AndAlso
(gdpicturePDF.SetImageOptional(image_res_name, ocgID) = GdPictureStatus.OK) Then
If (gdpicturePDF.SetOCGExportState(ocgID, PdfOcgState.StateOff) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.SetOCGLockedState(ocgID, True) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.SetOCGPrintState(ocgID, PdfOcgState.StateOn) = GdPictureStatus.OK) AndAlso
(gdpicturePDF.SetOCGViewState(ocgID, PdfOcgState.StateOn) = GdPictureStatus.OK) Then
If gdpicturePDF.SaveToFile("test_ImageLayer.pdf") = GdPictureStatus.OK Then
MessageBox.Show("The example HAS been followed successfully and the file has been saved.", caption)
Else
MessageBox.Show("The example HAS been followed successfully, but the file can't be saved. Status: " + gdpicturePDF.GetStat().ToString(), caption)
End If
Else
MessageBox.Show("Setting up layer's options has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)
End If
Else
MessageBox.Show("The NewOCG() or SetImageOptional() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)
End If
Else
MessageBox.Show("The AddJpegImageFromFile() method has failed with the status: " + status.ToString(), caption)
End If
Else
MessageBox.Show("The document can't be created.", caption)
End If
gdpicturePDF.Dispose()
string caption = "Example: SetOCGViewState";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
if ((gdpicturePDF.NewPDF() == GdPictureStatus.OK) &&
(gdpicturePDF.NewPage(PdfPageSizes.PdfPageSizeA4) == GdPictureStatus.OK))
{
string image_res_name = gdpicturePDF.AddJpegImageFromFile("image.jpg");
GdPictureStatus status = gdpicturePDF.GetStat();
if (status == GdPictureStatus.OK)
{
int ocgID = gdpicturePDF.NewOCG("Image layer");
status = gdpicturePDF.GetStat();
if ((status == GdPictureStatus.OK) &&
(gdpicturePDF.SetImageOptional(image_res_name, ocgID) == GdPictureStatus.OK))
{
if ((gdpicturePDF.SetOCGExportState(ocgID, PdfOcgState.StateOff) == GdPictureStatus.OK) &&
(gdpicturePDF.SetOCGLockedState(ocgID, true) == GdPictureStatus.OK) &&
(gdpicturePDF.SetOCGPrintState(ocgID, PdfOcgState.StateOn) == GdPictureStatus.OK) &&
(gdpicturePDF.SetOCGViewState(ocgID, PdfOcgState.StateOn) == GdPictureStatus.OK))
{
if (gdpicturePDF.SaveToFile("test_ImageLayer.pdf") == GdPictureStatus.OK)
{
MessageBox.Show("The example HAS been followed successfully and the file has been saved.", caption);
}
else
{
MessageBox.Show("The example HAS been followed successfully, but the file can't be saved. Status: " + gdpicturePDF.GetStat().ToString(), caption);
}
}
else
{
MessageBox.Show("Setting up layer's options has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);
}
}
else
{
MessageBox.Show("The NewOCG() or SetImageOptional() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);
}
}
else
{
MessageBox.Show("The AddJpegImageFromFile() method has failed with the status: " + status.ToString(), caption);
}
}
else
{
MessageBox.Show("The document can't be created.", caption);
}
gdpicturePDF.Dispose();