IsPageImage(Boolean) Method
Returns if the currently selected page of the loaded PDF is entirely image-based ignoring or not the hidden text according to the parameter you have specified.
Image-based pages are considered to contain nothing but one fully visible image covering the whole page area. This image must not be in any way rotated and must not contain any other particular drawing operation such as a clipping path.
public bool IsPageImage(
bool
)
public function IsPageImage(
: Boolean
): Boolean;
public function IsPageImage(
: boolean
) : boolean;
public: bool IsPageImage(
bool
)
public:
bool IsPageImage(
bool
)
'Declaration
Public Overloads Function IsPageImage( _
ByVal As Boolean _
) As Boolean
Parameters
- IgnoreHiddenText
- Specifies if the hidden text objects will be ignored. Hidden text is usually text with a text rendering mode which makes it invisible on the page.
Return Value
true if the currently selected page is entirely image-based as defined above, otherwise false. The
GdPicturePDF.GetStat method can be subsequently used to determine if this method has been successful.
How to find out if pages in the PDF document are image-based or not ignoring any hidden text if present.
Dim caption As String = "Example: IsPageImage"
Dim gdpicturePDF As New GdPicturePDF()
Dim status As GdPictureStatus = gdpicturePDF.LoadFromFile("image.pdf", False)
If status = GdPictureStatus.OK Then
Dim pageCount As Integer = gdpicturePDF.GetPageCount()
If gdpicturePDF.GetStat() = GdPictureStatus.OK Then
Dim result As Boolean = False
For i As Integer = 1 To pageCount
status = gdpicturePDF.SelectPage(i)
If status = GdPictureStatus.OK Then
result = gdpicturePDF.IsPageImage(True)
status = gdpicturePDF.GetStat()
If status = GdPictureStatus.OK Then
If result Then
MessageBox.Show("The page nr." + i.ToString() + " IS image-based.", caption)
Else
MessageBox.Show("The page nr." + i.ToString() + " IS NOT image-based.", caption)
End If
Else
MessageBox.Show("The IsPageImage() method has failed with the status: " + status.ToString(), caption)
End If
Else
MessageBox.Show("The SelectPage() method has failed with the status: " + status.ToString(), caption)
End If
Next
MessageBox.Show("Finished successfully.", caption)
Else
MessageBox.Show("The GetPageCount() method has failed with the status: " + status.ToString(), caption)
End If
Else
MessageBox.Show("The file can't be loaded.", caption)
End If
gdpicturePDF.Dispose()
string caption = "Example: IsPageImage";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
GdPictureStatus status = gdpicturePDF.LoadFromFile("image.pdf", false);
if (status == GdPictureStatus.OK)
{
int pageCount = gdpicturePDF.GetPageCount();
if (gdpicturePDF.GetStat() == GdPictureStatus.OK)
{
bool result = false;
for (int i = 1; i <= pageCount; i++)
{
status = gdpicturePDF.SelectPage(i);
if (status == GdPictureStatus.OK)
{
result = gdpicturePDF.IsPageImage(true);
status = gdpicturePDF.GetStat();
if (status == GdPictureStatus.OK)
{
if (result)
{
MessageBox.Show("The page nr." + i.ToString() + " IS image-based.", caption);
}
else
{
MessageBox.Show("The page nr." + i.ToString() + " IS NOT image-based.", caption);
}
}
else
{
MessageBox.Show("The IsPageImage() method has failed with the status: " + status.ToString(), caption);
}
}
else
{
MessageBox.Show("The SelectPage() method has failed with the status: " + status.ToString(), caption);
}
}
MessageBox.Show("Finished successfully.", caption);
}
else
{
MessageBox.Show("The GetPageCount() method has failed with the status: " + status.ToString(), caption);
}
}
else
{
MessageBox.Show("The file can't be loaded.", caption);
}
gdpicturePDF.Dispose();
