At most 4 elements (for any collection) can be viewed in evaluation mode.

See more:

C#

.NET

Aspose

im using aspose pdf for splitting the file as per input given by the user of page numbers
This code which i have written is working fine for the first four pages but when i try to split the 5th page or if i try to split page number > 4 then it shows an error
"At most 4 elements (for any collection) can be viewed in evaluation mode."

What I have tried:

string sourcePdfPath = @"F:\SplitPDF\SplitPDF\Main File\pdffile.pdf";
            string outputPdfPath = @"F:\SplitPDF\SplitPDF\Main File\";
            string pages = txtpagenumbers.Text;
            int[] extractThesePages = pages.Split(',').Select(n => Convert.ToInt32(n)).ToArray();
            Document pdfDocument = new Document(sourcePdfPath);
           int pageCount =  pdfDocument.Pages.Count;
            Document newDocument = new Document();
            foreach (int i in extractThesePages)
            {
                Page pdfPage = pdfDocument.Pages[i];
                newDocument.Pages.Add(pdfPage);
            }
            generatepassword();
            string fname =    "page_"+randfilenu+"_"+DateTime.Now.ToShortDateString()+".pdf";
            newDocument.Save(outputPdfPath + fname );
            MessageBox.Show("Splitted File has been Created and saved to folder: \n" + outputPdfPath + fname);