void buttonStart_Click(object sender, EventArgs e)
{
SplitSettings splitSettings = new SplitSettings();
splitSettings.InputFile = textBoxInputFile.Text;
splitSettings.OutputDirectory = textBoxOutputDirectory.Text;
if (radioButtonMulti.Checked == true)
{
splitSettings.MultiOutput = true;
splitSettings.PageNumbers = new List <int>();
if (numericUpDownPages.Value != 0)
{
splitSettings.PageNumbers.Add(Convert.ToInt32(numericUpDownPages.Value));
}
}
else
{
splitSettings.PageNumbers = splitSettings.GenerateNumberList(textBoxPages.Text);
}
List <string> errorMessage = Parameters.SearchForErrors(splitSettings);
if (errorMessage.Count != 0)
{
MessageBox.Show(errorMessage[0], errorMessage[1]);
}
else
{
if (splitSettings.ChangedPageNumbers != null)
{
MessageBox.Show($"The parameter for page numbers has been corrected: {Environment.NewLine}{splitSettings.ChangedPageNumbers}",
"Parameter change");
}
try
{
Splitter.SplitPDF(splitSettings);
if (checkBoxOpenResult.Checked)
{
if (splitSettings.MultiOutput)
{
System.Diagnostics.Process.Start(splitSettings.OutputDirectory);
}
else
{
System.Diagnostics.Process.Start(Path.Combine(splitSettings.OutputDirectory, splitSettings.PdfName));
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}
public static void SplitPDF(SplitSettings splitSettings)
{
if (splitSettings.MultiOutput == false)
{
PdfReader reader = new PdfReader(splitSettings.InputFile);
Document document = new Document(reader.GetPageSizeWithRotation(1));
string outputFullName = GetUniqueFileName(splitSettings.OutputDirectory, splitSettings.PdfName, ".pdf");
splitSettings.PdfName = Path.GetFileName(outputFullName);
PdfCopy copyProvider = new PdfCopy(document, new FileStream(outputFullName, FileMode.OpenOrCreate));
document.Open();
foreach (int pageNumber in splitSettings.PageNumbers)
{
PdfImportedPage pdfPage = copyProvider.GetImportedPage(reader, pageNumber);
copyProvider.AddPage(pdfPage);
}
document.Close();
}
else
{
if (Directory.GetFiles(splitSettings.OutputDirectory, "*.pdf").Length != 0)
{
splitSettings.OutputDirectory = CreateUniqueFolder(splitSettings.OutputDirectory, splitSettings.PdfName);
}
int pagesNeeded = splitSettings.PageNumbers[0];
PdfReader reader = new PdfReader(splitSettings.InputFile);
for (int i = 1; i <= splitSettings.PdfLastPage; i += pagesNeeded)
{
string outputFullName = $"{splitSettings.OutputDirectory}\\{splitSettings.PdfName}_{Convert.ToString((i - 1) / pagesNeeded + 1)}.pdf";
Document document = new Document(reader.GetPageSizeWithRotation(1));
PdfCopy copyProvider = new PdfCopy(document, new FileStream(outputFullName, FileMode.OpenOrCreate));
document.Open();
for (int n = 0; n < pagesNeeded && i + n <= splitSettings.PdfLastPage; ++n)
{
PdfImportedPage pdfPage = copyProvider.GetImportedPage(reader, i + n);
copyProvider.AddPage(pdfPage);
}
document.Close();
}
}
}
public static List <string> SearchForErrors(SplitSettings splitSettings)
{
List <string> errorMessage = new List <string>();
if (splitSettings.InputFile == null)
{
if (splitSettings.FileExists)
{
errorMessage.Add("The given file is not a valid PDF.");
errorMessage.Add("Wrong file");
errorMessage.Add("The given file (1st parameter) is not a valid PDF.");
}
else
{
errorMessage.Add("The given file can't be found.");
errorMessage.Add("Wrong file");
errorMessage.Add("The given file (1st parameter) can't be found.");
}
}
else if (splitSettings.OutputDirectory == null)
{
errorMessage.Add("The folder can't be reached or created.");
errorMessage.Add("Invalid path");
errorMessage.Add("The folder (2nd parameter) can't be reached or created.");
}
else if (splitSettings.PageNumbers.Count == 0)
{
if (splitSettings.MultiOutput)
{
errorMessage.Add($"Please give a natural number {Environment.NewLine}to specify the amount of pages you need in one file.");
errorMessage.Add("Wrong page number");
errorMessage.Add("Please give a number larger than 0 to specify the amount of pages you need in one file.");
}
else
{
errorMessage.Add($"Use numbers (mandatory), commas, hyphens or spaces {Environment.NewLine}to specify page numbers (e.g. \"1-5, 7\").");
errorMessage.Add("Wrong page numbers");
errorMessage.Add("Please use numbers (mandatory), commas, hyphens or spaces to specify page numbers (3rd parameter, e.g. \"1-5, 7\").");
}
}
else if (splitSettings.PageNumbers[0] == -1)
{
errorMessage.Add("Please remove the redundant hyphen(s) from page numbers.");
errorMessage.Add("Wrong page numbers");
errorMessage.Add("Please remove the redundant hyphen(s) from page numbers (3rd parameter).");
}
else if (splitSettings.PageNumbers.Count > 1 && splitSettings.MultiOutput)
{
errorMessage.Add("Won't happen in GUI mode.");
errorMessage.Add("");
errorMessage.Add("If you include '!' to page numbers, you can only have one number (e.g. \"12!\")");
}
else if (splitSettings.PageNumbers[0] == splitSettings.PdfLastPage + 1)
{
errorMessage.Add($"The file has only {splitSettings.PdfLastPage} pages. Please give a smaller number.");
errorMessage.Add("Page does not exist");
errorMessage.Add($"The file has only {splitSettings.PdfLastPage} pages. Please give a smaller number (3rd parameter).");
}
return(errorMessage);
}
