In This Topic
Returns if the currently selected page of the loaded PDF contains text, regardless if visible or hidden. It is the same as what the PageHasText(false) method does. Please note that special characters like \r, \n, \l are always considered as text.
This method uses an internal algorithm which is faster than the full page text extraction.
Syntax
'Declaration
Public Overloads Function PageHasText() As Boolean
public bool PageHasText()
public function PageHasText(): Boolean;
public function PageHasText() : boolean;
public: bool PageHasText();
public:
bool PageHasText();
Return Value
true if the currently selected page contains text, both visible and hidden, otherwise false. The
GetStat method can be subsequently used to determine if this method has been successful.
Example
How to find out if the current page in the PDF document contains text. The example shows you how to check all pages in the PDF document if they contain text or not (no matter if visible text or hidden).
Dim caption As String = "Example: PageHasText"
Dim gdpicturePDF As New GdPicturePDF()
Dim status As GdPictureStatus = gdpicturePDF.LoadFromFile("test.pdf", False)
If status = GdPictureStatus.OK Then
Dim pageCount As Integer = gdpicturePDF.GetPageCount()
If gdpicturePDF.GetStat() = GdPictureStatus.OK Then
Dim result As Boolean = False
Dim pagesWithText As Integer = 0, pagesWithoutText As Integer = 0
For i As Integer = 1 To pageCount
status = gdpicturePDF.SelectPage(i)
If status = GdPictureStatus.OK Then
result = gdpicturePDF.PageHasText()
status = gdpicturePDF.GetStat()
If status = GdPictureStatus.OK Then
If result Then
pagesWithText += 1
MessageBox.Show("The page nr." + i.ToString() + " HAS text.", caption)
Else
pagesWithoutText += 1
MessageBox.Show("The page nr." + i.ToString() + " HAS NO text.", caption)
End If
Else
MessageBox.Show("The PageHasText() 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
If (pagesWithText + pagesWithoutText) <> pageCount Then
MessageBox.Show("Something goes wrong: " + ((pagesWithText + pagesWithoutText).ToString() + "!=" + pageCount.ToString()), caption)
Else
MessageBox.Show("Finished successfully.", caption)
End If
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: PageHasText";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
GdPictureStatus status = gdpicturePDF.LoadFromFile("test.pdf", false);
if (status == GdPictureStatus.OK)
{
int pageCount = gdpicturePDF.GetPageCount();
if (gdpicturePDF.GetStat() == GdPictureStatus.OK)
{
bool result = false;
int pagesWithText = 0, pagesWithoutText = 0;
for (int i = 1; i <= pageCount; i++)
{
status = gdpicturePDF.SelectPage(i);
if (status == GdPictureStatus.OK)
{
result = gdpicturePDF.PageHasText();
status = gdpicturePDF.GetStat();
if (status == GdPictureStatus.OK)
{
if (result)
{
pagesWithText++;
MessageBox.Show("The page nr." + i.ToString() + " HAS text.", caption);
}
else
{
pagesWithoutText++;
MessageBox.Show("The page nr." + i.ToString() + " HAS NO text.", caption);
}
}
else
{
MessageBox.Show("The PageHasText() method has failed with the status: " + status.ToString(), caption);
}
}
else
{
MessageBox.Show("The SelectPage() method has failed with the status: " + status.ToString(), caption);
}
}
if ((pagesWithText + pagesWithoutText) != pageCount)
{
MessageBox.Show("Something goes wrong: " + ((pagesWithText + pagesWithoutText).ToString() + "!=" + pageCount.ToString()), caption);
}
else
{
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();
Example
How to find out if the current page in the PDF document contains text. The example shows you how to check all pages in the PDF document if they contain text or not (no matter if visible text or hidden).
Dim caption As String = "Example: PageHasText"
Dim gdpicturePDF As New GdPicturePDF()
Dim status As GdPictureStatus = gdpicturePDF.LoadFromFile("test.pdf", False)
If status = GdPictureStatus.OK Then
Dim pageCount As Integer = gdpicturePDF.GetPageCount()
If gdpicturePDF.GetStat() = GdPictureStatus.OK Then
Dim result As Boolean = False
Dim pagesWithText As Integer = 0, pagesWithoutText As Integer = 0
For i As Integer = 1 To pageCount
status = gdpicturePDF.SelectPage(i)
If status = GdPictureStatus.OK Then
result = gdpicturePDF.PageHasText()
status = gdpicturePDF.GetStat()
If status = GdPictureStatus.OK Then
If result Then
pagesWithText += 1
MessageBox.Show("The page nr." + i.ToString() + " HAS text.", caption)
Else
pagesWithoutText += 1
MessageBox.Show("The page nr." + i.ToString() + " HAS NO text.", caption)
End If
Else
MessageBox.Show("The PageHasText() 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
If (pagesWithText + pagesWithoutText) <> pageCount Then
MessageBox.Show("Something goes wrong: " + ((pagesWithText + pagesWithoutText).ToString() + "!=" + pageCount.ToString()), caption)
Else
MessageBox.Show("Finished successfully.", caption)
End If
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: PageHasText";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
GdPictureStatus status = gdpicturePDF.LoadFromFile("test.pdf", false);
if (status == GdPictureStatus.OK)
{
int pageCount = gdpicturePDF.GetPageCount();
if (gdpicturePDF.GetStat() == GdPictureStatus.OK)
{
bool result = false;
int pagesWithText = 0, pagesWithoutText = 0;
for (int i = 1; i <= pageCount; i++)
{
status = gdpicturePDF.SelectPage(i);
if (status == GdPictureStatus.OK)
{
result = gdpicturePDF.PageHasText();
status = gdpicturePDF.GetStat();
if (status == GdPictureStatus.OK)
{
if (result)
{
pagesWithText++;
MessageBox.Show("The page nr." + i.ToString() + " HAS text.", caption);
}
else
{
pagesWithoutText++;
MessageBox.Show("The page nr." + i.ToString() + " HAS NO text.", caption);
}
}
else
{
MessageBox.Show("The PageHasText() method has failed with the status: " + status.ToString(), caption);
}
}
else
{
MessageBox.Show("The SelectPage() method has failed with the status: " + status.ToString(), caption);
}
}
if ((pagesWithText + pagesWithoutText) != pageCount)
{
MessageBox.Show("Something goes wrong: " + ((pagesWithText + pagesWithoutText).ToString() + "!=" + pageCount.ToString()), caption);
}
else
{
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();
See Also