SetOCGViewState Method (GdPicturePDF)

In This Topic

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.

Syntax

Visual Basic
C#
Delphi
JScript
Managed Extensions for C++
C++/CLI

'Declaration
 
Public Function SetOCGViewState( _
   ByVal OCGId As Integer, _
   ByVal ViewState As PdfOcgState _
) As GdPictureStatus

public GdPictureStatus SetOCGViewState( 
   int OCGId,
   PdfOcgState ViewState
)

public function SetOCGViewState( 
    OCGId: Integer;
    ViewState: PdfOcgState
): GdPictureStatus;

public function SetOCGViewState( 
   OCGId : int,
   ViewState : PdfOcgState
) : GdPictureStatus;

public: GdPictureStatus SetOCGViewState( 
   int OCGId,
   PdfOcgState ViewState
)

public:
GdPictureStatus SetOCGViewState( 
   int OCGId,
   PdfOcgState ViewState
)

Parameters

OCGId: The unique identifier of the required OCG entry. You can obtain this identifier using the 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.

Remarks

This method is only allowed for use with non-encrypted documents.

Example

How to enable the View state setting for the specified layer in the PDF document.

VB.NET
C#

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();

Reference

GdPicturePDF Class
GdPicturePDF Members
GetOCGCount Method
GetOCG Method
SetOCGTitle Method
SetOCGExportState Method
SetOCGLockedState Method
SetOCGPrintState Method
SetOCGViewState Method
NewOCG Method
SetImageOptional Method
SetFormFieldOptional Method