ClearPageContent Method (GdPicturePDF)
Empties, that means completely removes, the whole content of the currently selected page in the loaded PDF document. The selected page becomes blank,
but it retains its properties, for example, page dimensions or the rotation.
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.
How to remove the whole content of the first page in the PDF document.
Dim caption As String = "Example: ClearPageContent"
Dim gdpicturePDF As New GdPicturePDF()
If gdpicturePDF.LoadFromFile("test.pdf", False) = GdPictureStatus.OK Then
Dim count As Integer = gdpicturePDF.GetPageCount()
Dim status As GdPictureStatus = gdpicturePDF.GetStat()
If status = GdPictureStatus.OK Then
If count > 0 Then
status = gdpicturePDF.SelectPage(1)
If status = GdPictureStatus.OK Then
status = gdpicturePDF.ClearPageContent()
If status = GdPictureStatus.OK Then
Dim message As String = "The pages have been cleared successfully"
If gdpicturePDF.SaveToFile("test_ClearPageContent.pdf") = GdPictureStatus.OK Then
message = message + " and the file has been saved."
Else
message = message + ", but the file can't be saved."
End If
MessageBox.Show(message, caption)
Else
MessageBox.Show("The ClearPageContent() method has failed with the status: " + status.ToString(), caption)
End If
Else
MessageBox.Show("The page can't be selected.", caption)
End If
Else
MessageBox.Show("This document contains no pages.", 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: ClearPageContent";
GdPicturePDF gdpicturePDF = new GdPicturePDF();
if (gdpicturePDF.LoadFromFile("test.pdf", false) == GdPictureStatus.OK)
{
int count = gdpicturePDF.GetPageCount();
GdPictureStatus status = gdpicturePDF.GetStat();
if (status == GdPictureStatus.OK)
{
if (count > 0)
{
status = gdpicturePDF.SelectPage(1);
if (status == GdPictureStatus.OK)
{
status = gdpicturePDF.ClearPageContent();
if (status == GdPictureStatus.OK)
{
string message = "The pages have been cleared successfully";
if (gdpicturePDF.SaveToFile("test_ClearPageContent.pdf") == GdPictureStatus.OK)
message = message + " and the file has been saved.";
else
message = message + ", but the file can't be saved.";
MessageBox.Show(message, caption);
}
else
MessageBox.Show("The ClearPageContent() method has failed with the status: " + status.ToString(), caption);
}
else
MessageBox.Show("The page can't be selected.", caption);
}
else
MessageBox.Show("This document contains no pages.", 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();
