GdPicture.NET.14
GdPicture14 Namespace / GdPicturePDF Class / SetAnnotationSubject Method
The 0-based index of the required annotation within the current page. It must be a value from 0 to GetAnnotationCount-1.
The new subject of the specified annotation object.
Example





In This Topic
SetAnnotationSubject Method (GdPicturePDF)
In This Topic
Sets the subject of a required annotation object specified by its index related to the currently selected page of the loaded PDF document. It is a short text description of the subject being addressed by the specified annotation.
Syntax
'Declaration
 
Public Function SetAnnotationSubject( _
   ByVal AnnotationIdx As Integer, _
   ByVal Subject As String _
) As GdPictureStatus
public GdPictureStatus SetAnnotationSubject( 
   int AnnotationIdx,
   string Subject
)
public function SetAnnotationSubject( 
    AnnotationIdx: Integer;
    Subject: String
): GdPictureStatus; 
public function SetAnnotationSubject( 
   AnnotationIdx : int,
   Subject : String
) : GdPictureStatus;
public: GdPictureStatus SetAnnotationSubject( 
   int AnnotationIdx,
   string* Subject
) 
public:
GdPictureStatus SetAnnotationSubject( 
   int AnnotationIdx,
   String^ Subject
) 

Parameters

AnnotationIdx
The 0-based index of the required annotation within the current page. It must be a value from 0 to GetAnnotationCount-1.
Subject
The new subject of the specified annotation object.

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.

Likewise always ensure that you have selected the correct page using the SelectPage method before applying an annotation index.

Example
How to change the subject of all annotations in the loaded PDF document.
Dim caption As String = "Example: SetAnnotationSubject"
Dim gdpicturePDF As GdPicturePDF = New GdPicturePDF()
If gdpicturePDF.LoadFromFile("test.pdf", False) = GdPictureStatus.OK Then
    Dim pageCount As Integer = gdpicturePDF.GetPageCount()
    If gdpicturePDF.GetStat() = GdPictureStatus.OK Then
        Dim message As String = ""
        Dim status As GdPictureStatus = GdPictureStatus.OK
        For page As Integer = 1 To pageCount
            message = message + "Page nr." + page.ToString()
            status = gdpicturePDF.SelectPage(page)
            If status = GdPictureStatus.OK Then
                Dim annotCount As Integer = gdpicturePDF.GetAnnotationCount()
                status = gdpicturePDF.GetStat()
                If status = GdPictureStatus.OK Then
                    message = message + "  Annots: " + annotCount.ToString()
                    For annotID As Integer = 0 To annotCount - 1
                        status = gdpicturePDF.SetAnnotationSubject(annotID, "Reviewed by Orpalis")
                        If status <> GdPictureStatus.OK Then Exit For
                    Next
                    message = message + "  status: " + status.ToString()
                Else
                    message = message + "GetAnnotationCount - status: " + status.ToString()
                End If
            Else
                message = message + "SelectPage - status: " + status.ToString()
            End If
            message += vbCrLf
        Next
        If gdpicturePDF.SaveToFile("test_subjects.pdf") = GdPictureStatus.OK Then
            message = message + "The file has been saved."
        Else
            message = message + "The file can't be saved. Status: " + gdpicturePDF.GetStat().ToString()
        End If
        MessageBox.Show(message, caption)
    Else
        MessageBox.Show("The GetPageCount() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption)
    End If
Else
    MessageBox.Show("The file can't be loaded.", caption)
End If
gdpicturePDF.Dispose()
string caption = "Example: SetAnnotationSubject";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
if (gdpicturePDF.LoadFromFile("test.pdf", false) == GdPictureStatus.OK)
{
    int pageCount = gdpicturePDF.GetPageCount();
    if (gdpicturePDF.GetStat() == GdPictureStatus.OK)
    {
        string message = "";
        GdPictureStatus status = GdPictureStatus.OK;
        for (int page = 1; page <= pageCount; page++)
        {
            message = message + "Page nr." + page.ToString();
            status = gdpicturePDF.SelectPage(page);
            if (status == GdPictureStatus.OK)
            {
                int annotCount = gdpicturePDF.GetAnnotationCount();
                status = gdpicturePDF.GetStat();
                if (status == GdPictureStatus.OK)
                {
                    message = message + "  Annots: " + annotCount.ToString();
                    for (int annotID = 0; annotID < annotCount; annotID++)
                    {
                        status = gdpicturePDF.SetAnnotationSubject(annotID, "Reviewed by Orpalis");
                        if (status != GdPictureStatus.OK) break;
                    }
                    message = message + "  status: " + status.ToString();
                }
                else
                    message = message + "GetAnnotationCount - status: " + status.ToString();
            }
            else
                message = message + "SelectPage - status: " + status.ToString();
            message += "\n";
        }
        if (gdpicturePDF.SaveToFile("test_subjects.pdf") == GdPictureStatus.OK)
            message = message + "The file has been saved.";
        else
            message = message + "The file can't be saved. Status: " + gdpicturePDF.GetStat().ToString();
        MessageBox.Show(message, caption);
    }
    else
        MessageBox.Show("The GetPageCount() method has failed with the status: " + gdpicturePDF.GetStat().ToString(), caption);
}
else
    MessageBox.Show("The file can't be loaded.", caption);
gdpicturePDF.Dispose();
See Also