IText7 和 C# 中缺少的 GetPageN 方法

Question

I've this C# code working with iTextSharp 5 and I need to port it to IText7 .

public static PdfReader Fix(PdfReader pdfReader, int pagina)
{
    var dic = pdfReader.GetPageN(pagina);
    var resources = dic.GetAsDict(PdfName.Resources);

    var fonts = resources?.GetAsDict(PdfName.Font);
    if (fonts == null) return pdfReader;

    foreach (var key in fonts.Keys)
    {
        var font = fonts.GetAsDict(key);

        var firstChar = font.Get(PdfName.FirstChar);
        if (firstChar == null)
            font.Put(PdfName.FirstChar, new PdfNumber(32));

        var lastChar = font.Get(PdfName.LastChar);
        if (lastChar == null)
            font.Put(PdfName.LastChar, new PdfNumber(255));

        var widths = font.GetAsArray(PdfName.Widths);

        if (widths != null) continue;
        var array = Enumerable.Repeat(600, 256).ToArray();
        font.Put(PdfName.Widths, new PdfArray(array));
    }

    return pdfReader;
}

The problem I have is that the method GetPageN in this line:

var dic = pdfReader.GetPageN(pagina);

has been removed.

Have someone faced the same problem?

Answer 1

Indeed, now the GetPage() method is inside of the PdfDocument class.

There are also some little changes as to how you get the Dictionary entries from the document, which I took the liberty to adjust your code to.

public static PdfReader Fix(PdfReader pdfReader, int pagina)
{
    var dic = new PdfDocument(pdfReader).GetPage(pagina);
    var resources = dic.GetPdfObject().GetAsDictionary(PdfName.Resources);

    var fonts = resources?.GetAsDictionary(PdfName.Font);
    if (fonts == null) return pdfReader;

    foreach (var key in fonts.KeySet())
    {
        var font = fonts.GetAsDictionary(key);

        var firstChar = font.Get(PdfName.FirstChar);
        if (firstChar == null)
            font.Put(PdfName.FirstChar, new PdfNumber(32));

        var lastChar = font.Get(PdfName.LastChar);
        if (lastChar == null)
            font.Put(PdfName.LastChar, new PdfNumber(255));

        var widths = font.GetAsArray(PdfName.Widths);

        if (widths != null) continue;
        var array = Enumerable.Repeat(600, 256).ToArray();
        font.Put(PdfName.Widths, new PdfArray(array));
    }

    return pdfReader;
}

(I haven't checked your code, just made sure that at least what you posted now compiles)