我正在尝试将 XPS 文档拆分为其他 XPS 文档。我已经使用以下代码开始,它适用于单个页面但不是更多(http://stackoverflow.com/questions/5328596/extract-a-single-page-from-an-xps-document)。在下面的代码中,我试图将父文档的前 3 页提取到子文档中。一旦我弄清楚这一点,我会将剩余的页面提取到其他文档中。
我遇到的问题是将父页面添加到子页面,因此我尝试使用内存流创建每个页面的副本,但现在在调用 XpsDocumentWriter 时出现以下异常。
异常:“发生 I/O 错误”。
我应该如何将父母的页面添加到孩子?
已解决:此代码适用于我的 WF4 项目。
public void Split(InputFile parent, string outputDirectory, int splitPageFrequency, CodeActivityContext context)
{
// Open the parent XPS package
using (Package package = Package.Open(parent.InputFilePath, FileMode.Open, FileAccess.Read))
{
string Pack = "pack://temp.xps";
Uri packageUri = new Uri(Pack);
PackageStore.AddPackage(packageUri, package);
// Get the parent XPS document
XpsDocument xpsDocumentParent = new XpsDocument(package, CompressionOption.Maximum, Pack);
FixedDocumentSequence fixedDocumentSequenceParent = xpsDocumentParent.GetFixedDocumentSequence();
DocumentReference documentReferenceParent = fixedDocumentSequenceParent.References.First();
FixedDocument fixedDocumentParent = documentReferenceParent.GetDocument(false);
for (int pageCounter = 0, fileCounter = 1; pageCounter < fixedDocumentParent.Pages.Count; pageCounter += splitPageFrequency, fileCounter++)
{
// Generate the child file name
Guid documentId = Guid.NewGuid();
string childName = outputDirectory + parent.InputFileId + "_" + fileCounter + "_" + documentId + ".xps";
// Open the child XPS package
using (Package packageDest = Package.Open(childName))
{
// Create the child XPS document
XpsDocument xpsDocumentChild = new XpsDocument(packageDest, CompressionOption.Maximum, childName);
FixedDocument fixedDocumentChild = new FixedDocument();
// Add the parent's pages in range to the child
for (int pageCounterChild = pageCounter; pageCounterChild < pageCounter + splitPageFrequency; pageCounterChild++)
{
// Add the copied fixedpage to the child FixedDocument.
PageContent pageContentChild = new PageContent();
pageContentChild.Source = fixedDocumentParent.Pages[pageCounterChild].Source;
(pageContentChild as IUriContext).BaseUri = ((IUriContext)fixedDocumentParent.Pages[pageCounterChild]).BaseUri;
pageContentChild.GetPageRoot(false);
fixedDocumentChild.Pages.Add(pageContentChild);
}
//Write the child FixedDocument to the XPSdocument
XpsDocumentWriter writer = XpsDocument.CreateXpsDocumentWriter(xpsDocumentChild);
writer.Write(fixedDocumentChild);
xpsDocumentChild.Close();
}
// Set the OutArgument value
NumberOfDocuments.Set(context, fileCounter);
}
PackageStore.RemovePackage(packageUri);
xpsDocumentParent.Close();
}
}