如何在iTextC中使用Base64图像#

在这个代码片段中,我使用它将HTML转换为PDF,然后再转换回 MemoryStream .

private MemoryStream createPDF(string html)
{
    try
    {
        MemoryStream msOutput = new MemoryStream();
        TextReader reader = new StringReader(html);

        Document document = new Document(PageSize.A4, 30, 30, 30, 30);

        PdfWriter writer = PdfWriter.GetInstance(document, msOutput);

        HTMLWorker worker = new HTMLWorker(document);

        document.Open();
        worker.StartDocument();

        worker.Parse(reader); //error occurs in here
        
        worker.EndDocument();
        worker.Close();
        document.Close();
        var bytedata = msOutput.ToArray();
        var pdfContent = new MemoryStream(bytedata);
        return pdfContent;
    }
    catch (Exception ex)
    {

        throw;
    }
}

但是当HTML内容与Base64图像一致时。我在这条线上遇到了这个错误( worker.Parse(reader); ).

The URI prefix is not recognized.

我做了几次变通,并了解到出现这种情况是因为可以解释 itextsharp 必须没有数据前缀。我该怎么解决这个问题?