GetAnnotationCount Method (GdPicturePDF)
In This Topic
Returns the number of all annotation objects contained within the currently selected page of the loaded PDF document.
The standard annotation types are described in the PDF Reference, Section "Annotation Types". You can subsequently use the GetAnnotationSubType method to find out the correct subtype ("Popup", "Text", "FreeText", etc.) of the specific annotation object.
Please note that the final count of all annotation objects on the current page also includes all those Popup annotation objects, that are expressly detected in the internal structure of the currently loaded PDF document.
Syntax
'Declaration
Public Function GetAnnotationCount() As Integer
public int GetAnnotationCount()
public function GetAnnotationCount(): Integer;
public function GetAnnotationCount() : int;
public: int GetAnnotationCount();
public:
int GetAnnotationCount();
Return Value
The number of all annotation objects on the current page, that includes Popup annotation objects (expressly inscribed in the document's internal structure) as well. The
GetStat method can be subsequently used to determine if this method has been successful.
Example
How to find out the number of all annotation objects within the current page of the PDF document.
Dim caption As String = "Example: GetAnnotationCount"
Dim gdpicturePDF As GdPicturePDF = New GdPicturePDF()
Dim status As GdPictureStatus = gdpicturePDF.LoadFromFile("test.pdf", False)
If status = GdPictureStatus.OK Then
Dim message As String = ""
Dim annots As Integer = 0
Dim pageCount As Integer = gdpicturePDF.GetPageCount()
For i As Integer = 1 To pageCount
status = gdpicturePDF.SelectPage(i)
If status <> GdPictureStatus.OK Then
message = message + "The SelectPage(" + i.ToString() + ") method has failed with the status: " + status.ToString() + vbCrLf
Else
message = message + "The page nr." + i.ToString()
Dim annotCount As Integer = gdpicturePDF.GetAnnotationCount()
status = gdpicturePDF.GetStat()
If status <> GdPictureStatus.OK Then
message = message + ": the GetAnnotationCount() method has failed with the status: " + status.ToString() + vbCrLf
Else
If annotCount = 0 Then
message = message + " does not contain any annotations." + vbCrLf
Else
message = message + " contains " + annotCount.ToString() + " annotations." + vbCrLf
annots = annots + annotCount
End If
End If
End If
Next
message = message + "The total number of annotations in this document is: " + annots.ToString()
MessageBox.Show(message, caption)
Else
MessageBox.Show("The file can't be loaded.", caption)
End If
gdpicturePDF.Dispose()
string caption = "Example: GetAnnotationCount";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
GdPictureStatus status = gdpicturePDF.LoadFromFile("test.pdf", false);
if (status == GdPictureStatus.OK)
{
string message = "";
int annots = 0;
int pageCount = gdpicturePDF.GetPageCount();
for (int i = 1; i <= pageCount; i++)
{
status = gdpicturePDF.SelectPage(i);
if (status != GdPictureStatus.OK)
{
message = message + "The SelectPage(" + i.ToString() + ") method has failed with the status: " + status.ToString() + "\n";
}
else
{
message = message + "The page nr." + i.ToString();
int annotCount = gdpicturePDF.GetAnnotationCount();
status = gdpicturePDF.GetStat();
if (status != GdPictureStatus.OK)
{
message = message + ": the GetAnnotationCount() method has failed with the status: " + status.ToString() + "\n";
}
else
{
if (annotCount == 0)
{
message = message + " does not contain any annotations." + "\n";
}
else
{
message = message + " contains " + annotCount.ToString() + " annotations." + "\n";
annots = annots + annotCount;
}
}
}
}
message = message + "The total number of annotations in this document is: " + annots.ToString();
MessageBox.Show(message, caption);
}
else
{
MessageBox.Show("The file can't be loaded.", caption);
}
gdpicturePDF.Dispose();
See Also