iTextSharp正在生成损坏的PDF

如何解决iTextSharp正在生成损坏的PDF

|| 下面的代码片段返回了损坏的PDF文档，但是，如果我返回mergedDocument，它将始终返回有效的PDF。 mergedDocument基于我使用Word创建的PDF文件，而完整的文档完全以编程方式生成。代码“作品”不会引发任何异常。为什么iTextSharp创建损坏的PDF？

byte[] completedDocument = null;            
using (MemoryStream streamCompleted = new MemoryStream())
{
    using (Document document = new Document())
    {                    
        PdfCopy copy = new PdfCopy(document,streamCompleted);
        document.Open();
        copy.Open();                    

        foreach (var item in eventItems)
        {
            byte[] mergedDocument = null;
            PdfReader reader = new PdfReader(pdfTemplates[item.DataTokens[NotifyTokenType.OrganisationID]]);
            using (MemoryStream streamTemplate = new MemoryStream())
            {
                using (PdfStamper stamper = new PdfStamper(reader,streamTemplate))
                {
                    foreach (var token in item.DataTokens)
                    {
                        if (stamper.AcroFields.Fields.Any(fld => fld.Key == token.Key.ToString()))
                        {
                            stamper.AcroFields.SetField(token.Key.ToString(),token.Value);
                        }
                    }
                    stamper.FormFlattening = true;
                    stamper.Writer.CloseStream = false;
                }

                mergedDocument = new byte[streamTemplate.Length];
                streamTemplate.Position = 0;
                streamTemplate.Read(mergedDocument,(int)streamTemplate.Length);
            }
            reader = new PdfReader(mergedDocument);

            for (int i = 1; i <= reader.NumberOfPages; i++)
            {
                document.SetPageSize(PageSize.A4);
                copy.AddPage(copy.GetImportedPage(reader,i));
            }
        }
        completedDocument = new byte[streamCompleted.Length];
        streamCompleted.Position = 0;
        streamCompleted.Read(completedDocument,(int)streamCompleted.Length);
    }                
}
return completedDocument;

    

解决方法

        您需要关闭

document

和

copy

对象才能刷新PDF写入缓冲区。但是，这在尝试将流读入数组时会引起一些问题。解决方法是使用仍适用于封闭流的

MemoryStream

的ѭ3still方法。我所做的更改对此有意见。

        byte[] completedDocument = null;
        using (MemoryStream streamCompleted = new MemoryStream())
        {
            using (Document document = new Document())
            {
                PdfCopy copy = new PdfCopy(document,streamCompleted);
                document.Open();
                copy.Open();

                foreach (var item in eventItems)
                {
                    byte[] mergedDocument = null;
                    PdfReader reader = new PdfReader(pdfTemplates[item.DataTokens[NotifyTokenType.OrganisationID]]);
                    using (MemoryStream streamTemplate = new MemoryStream())
                    {
                        using (PdfStamper stamper = new PdfStamper(reader,streamTemplate))
                        {
                            foreach (var token in item.DataTokens)
                            {
                                if (stamper.AcroFields.Fields.Any(fld => fld.Key == token.Key.ToString()))
                                {
                                    stamper.AcroFields.SetField(token.Key.ToString(),token.Value);
                                }
                            }
                            stamper.FormFlattening = true;
                            stamper.Writer.CloseStream = false;
                        }
                        //Copy the stream\'s bytes
                        mergedDocument = streamTemplate.ToArray();
                    }
                    reader = new PdfReader(mergedDocument);

                    for (int i = 1; i <= reader.NumberOfPages; i++)
                    {
                        document.SetPageSize(PageSize.A4);
                        copy.AddPage(copy.GetImportedPage(reader,i));
                    }
                    //Close the document and the copy
                    document.Close();
                    copy.Close();
                }
                //ToArray() can operate on closed streams
                completedDocument = streamCompleted.ToArray();
            }
        }
        return completedDocument;

    ,        另外，在将html转换为pdf时，请确保您的html不包含hr标签。

hdnEditorText.Value.Replace(\"\\\"\",\"\'\").Replace(\"<hr />\",\"\").Replace(\"<hr/>\",\"\")