public static PdfRangeDocument FromDocument(PdfView.IPdfDocument document, int startPage, int endPage)
{
if (document == null)
{
throw new ArgumentNullException(nameof(document));
}
if (endPage < startPage)
{
throw new ArgumentException("End page cannot be less than start page");
}
if (startPage < 0)
{
throw new ArgumentException("Start page cannot be less than zero");
}
if (endPage >= document.PageCount)
{
throw new ArgumentException("End page cannot be more than the number of pages in the document");
}
return(new PdfRangeDocument(
document,
startPage,
endPage
));
}
public PageRangeForm(PdfView.IPdfDocument document)
{
_document = document;
InitializeComponent();
_startPage.Text = "1";
_endPage.Text = document.PageCount.ToString();
}
private void _acceptButton_Click(object sender, EventArgs e)
{
int startPage;
int endPage;
if (
!int.TryParse(_startPage.Text, out startPage) ||
!int.TryParse(_endPage.Text, out endPage) ||
startPage < 1 ||
endPage > _document.PageCount ||
startPage > endPage
)
{
MessageBox.Show(this, "Invalid start/end page");
}
else
{
Document = PdfRangeDocument.FromDocument(_document, startPage - 1, endPage - 1);
DialogResult = DialogResult.OK;
}
}
private PdfRangeDocument(PdfView.IPdfDocument document, int startPage, int endPage)
{
_document = document;
_startPage = startPage;
_endPage = endPage;
}
