public bool ExtractAllTextFromDwg(string inPdfFileName, string outTxtFileName, out string err)
{
bool result = false;
string annotType = "";
string contents = "";
err = "";
try
{
if (isLibraryLoaded == false)
{
result = LoadPDFLib();
if (result == false)
{
return(result);
}
}
int docId = pdfLib.LoadFromFile(inPdfFileName, "");
if (docId == 0) //failed
{
err += pdfLib.LastErrorCode();
return(false);
}
pdfLib.SelectDocument(docId);
for (int pageNo = 1; pageNo <= pdfLib.PageCount(); ++pageNo) //Model contains no text
{
pdfLib.SelectPage(pageNo);
for (int i = 1; i < pdfLib.AnnotationCount(); ++i)
{
annotType = pdfLib.GetAnnotStrProperty(i, 101);
if (annotType.Equals("Square"))
{
contents += pdfLib.GetAnnotStrProperty(i, 102) + "\n"; //102 = contents
}
}
}
if (!string.IsNullOrWhiteSpace(contents))
{
File.WriteAllText(outTxtFileName, contents);
}
}
catch (Exception ex)
{
err += ex.Message + "\n";
err += pdfLib.LastErrorCode();
}
return(result);
}