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我试图从 Web 应用程序生成多页 XPS 文档，并尝试在单击按钮时流式传输该文档。

公共类 Class1 {

protected void btnGenerateLetter_OnClick(object sender, EventArgs e)
{
    try
    {
        string sid = Request.Form["id"];
        byte[] bytes = FlowDocumentToXPS(GenerateLetter(), 640, 800);
        Response.Clear();
        Response.ContentType = "application/vnd.ms-xpsdocument";
        Response.AddHeader("Content-Disposition", "attachment; filename=document.xps");
        Response.OutputStream.Write(bytes, 0, bytes.Length);
        Response.Flush();
        Response.Close();
    }
    catch (Exception ex)
    {
    }

}

private FlowDocument GenerateLetter()
{
    FlowDocument flowDocument = new FlowDocument();

    string Header = "Test Header Message";
    string Body = "Content goes here";
    string Footer = "Footer Text";

    for (int i = 0; i < 3; i++)
    {
        Paragraph header = new Paragraph();
        header.Margin = new System.Windows.Thickness(250, 100, 250, 10);
        header.BreakPageBefore = true;

        header.Inlines.Add(new Run(Header));
        header.Inlines.Add(new LineBreak());
        header.Inlines.Add(new LineBreak());
        header.Inlines.Add(new LineBreak());

        Paragraph body = new Paragraph();
        body.Inlines.Add(new Run(Body));
        body.Inlines.Add(new LineBreak());
        body.Inlines.Add(new LineBreak());

        Paragraph footer = new Paragraph();
        footer.Inlines.Add(new Run(Footer));

        flowDocument.Blocks.Add(header);
        flowDocument.Blocks.Add(body);
        flowDocument.Blocks.Add(footer);
    }
    return flowDocument;
}

public static byte[] FlowDocumentToXPS(FlowDocument flowDocument, int width, int height)
{
    MemoryStream stream = new MemoryStream();
    // create a package
    using (Package package = Package.Open(stream, FileMode.CreateNew))
    {
        // create an empty XPS document   
        using (XpsDocument xpsDoc = new XpsDocument(package, CompressionOption.NotCompressed))
        {
            // create a serialization manager
            XpsSerializationManager rsm = new XpsSerializationManager(new XpsPackagingPolicy(xpsDoc), false);
            // retrieve document paginator
            DocumentPaginator paginator = ((IDocumentPaginatorSource)flowDocument).DocumentPaginator;
            // set page size
            paginator.PageSize = new System.Windows.Size(width, height);
            // save as XPS
            rsm.SaveAsXaml(paginator);
            rsm.Commit();
        }
        return stream.ToArray();
    }
}

}

这在开发环境中运行良好。但是在不同的机器上部署时出现此错误。（IIS6）。

启动 URI：C:\Documents and Settings\050583b.syn\Desktop\document.xps 应用程序标识：

System.IO.FileFormatException：文件包含损坏的数据。在 MS.Internal.IO.Zip.ZipIOEndOfCentralDirectoryBlock.FindPosition(Stream archiveStream) 在 MS.Internal.IO.Zip.ZipIOEndOfCentralDirectoryBlock.SeekableLoad(ZipIOBlockManager blockManager) 在 MS.Internal.IO.Zip.ZipIOBlockManager.LoadEndOfCentralDirectoryBlock() 在 MS.Internal .IO.Zip.ZipArchive..ctor(Stream archiveStream, FileMode mode, FileAccess access, Boolean streaming, Boolean ownStream) at MS.Internal.IO.Zip.ZipArchive.OpenOnStream(Stream stream, FileMode mode, FileAccess access, Boolean streaming)在 System.IO.Packaging.ZipPackage..ctor(Stream s, FileMode mode, FileAccess access, Boolean streaming) 在 System.IO.Packaging.Package.Open(Stream stream, FileMode packageMode, FileAccess packageAccess, Boolean streaming) 在 System. IO.包装.包装。2.Dispatch(Action action, S subject) at MS.Internal.Documents.Application.DocumentManager.<>c__DisplayClass6.<OrderByLeastDependent>b__4(Document member) at MS.Internal.Documents.Application.ChainOfDependencies1.OrderByLeastDependent(T member, Action action) 在 MS.Internal.Documents.Application.DocumentManager.OrderByLeastDependent(DispatchDelegate action, Document document) 在 MS.Internal.Documents.Application.DocumentManager.Open(Document document) 在 MS.Internal。 AppModel.ApplicationProxyInternal.InitContainer() 在 MS.Internal.AppModel.ApplicationProxyInternal.Run(InitData initData)

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1 回答 1

3

我想问题是字节没有完全写入响应。尝试以下，希望它应该工作。

HttpContext context = HttpContext.Current;
context.Response.Clear(); 
context.Response.ContentType = "application/vnd.ms-xpsdocument";
context.Response.AppendHeader("Content-Disposition", "attachment; filename=document.xps");
context.Response.End();
于 2009-09-02T08:00:57.413 回答