Aspose公司对旗下PDF文档处理控件 Aspose.Pdf for .NET发布了新的11.6版本，在新的版本中对PDF转换为PDF/A, PDF转换为TIFF/JPEG 和 HTML转换为PDF进行了增强，并且对产品提供的API在处理各种复杂情况进行了提高，对以往版本中出现的BUG进行了修复，具体可以参考下面的介绍：

 

1.在PDF转换为TIFF文档时可以使用Bradley算法了，具体如下：

string outputImageFile = @"c:\resultant.tif";

string outputBinImageFile = @"c:\37116-bin.tif";

//open document

Aspose.Pdf.Document pdfDocument = new Aspose.Pdf.Document(@"c:\input.pdf");

//create Resolution object

Resolution resolution = new Resolution(300);

//create TiffSettings object

TiffSettings tiffSettings = new TiffSettings();

tiffSettings.Compression = CompressionType.LZW;

tiffSettings.Depth = Aspose.Pdf.Devices.ColorDepth.Format1bpp;

//create TIFF device

TiffDevice tiffDevice = new TiffDevice(resolution, tiffSettings);

//convert a particular page and save the image to stream

tiffDevice.Process(pdfDocument, outputImageFile);

 

using (FileStream inStream = new FileStream(outputImageFile, FileMode.Open))

{

       using (FileStream outStream = new FileStream(outputBinImageFile, FileMode.Create))

       {

              tiffDevice.BinarizeBradley(inStream, outStream, 0.1);

       }

}

2.PageNumberStamp类新增了自定义页码样式功能，PageNumberStamp类主要用于把PDF文档页码以邮戳的形式添加到PDF文档里，下面的代码讲述了如何使用自定义页码样式

// load existing PDF file

Document doc = new Document("source.pdf");

// instantiate PageNumberStamp object

PageNumberStamp page_Stamp = new PageNumberStamp();

// set numbering style for page number stamp

// select numberingstyle value from enumeration

page_Stamp.NumberingStyle = NumberingStyle.NumeralsRomanUppercase;

// itterate through PDF pages

foreach (Page page in doc.Pages)

{

    // put page numbering style stamp

    page_Stamp.Put(page);

}

// save updated PDF document

doc.Save("resultnat.pdf");

 

3.完整的更新内容可以参考下面的链接，开发人员可以从控件中国网下载最新的试用版进行测试：

http://www.aspose.com/docs/display/pdfnet/Aspose.Pdf+for+.NET+11.6.0+Release+Notes