从Web应用程序生成XPS文档

Question

从Web应用程序生成XPS文档

3

我正在尝试从Web应用程序生成一个多页的XPS文档，并尝试在按钮点击时进行流式传输。

public class Class1 {

（以下内容需要进一步上下文才能翻译）

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();
    }
}

}

在开发环境中这个工作正常。但是在另一台机器上部署时（IIS6），出现了错误。

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）中在MS.Internal.IO.Zip.ZipIOEndOfCentralDirectoryBlock.SeekableLoad（ZipIOBlockManager blockManager）中在MS.Internal.IO.Zip.ZipIOBlockManager.LoadEndOfCentralDirectoryBlock（）中在MS.Internal.IO.Zip.ZipArchive..ctor（Stream archiveStream，FileMode mode，FileAccess access，Boolean streaming，Boolean ownStream）中在MS.Internal.IO.Zip.ZipArchive.OpenOnStream（Stream stream，FileMode mode，FileAccess access，Boolean streaming）中在System.IO.Packaging.ZipPackage..ctor（Stream s，FileMode mode，FileAccess access，Boolean streaming）中在System.IO.Packaging.Package.Open（Stream stream，FileMode packageMode，FileAccess packageAccess，Boolean streaming）中在System.IO.Packaging.Package.Open（Stream stream）中在MS.Internal.Documents.Application.TransactionalPackage..ctor（Stream original）中在MS.Internal.Documents.Application.PackageController.MS.Internal.Documents.Application.IDocumentController.Open（Document document）中在MS.Internal.Documents.Application.DocumentManager.DispatchOpen（IDocumentController controller，Document document）中在MS.Internal.Documents.Application.DocumentManager.<>c__DisplayClass6.b__5（IDocumentController controller，Document subject）中在MS.Internal.Documents.Application.ChainOfResponsiblity<code>2.Dispatch（Action action，S subject）中在MS.Internal.Documents.Application.DocumentManager.<>c__DisplayClass6.<OrderByLeastDependent>b__4（Document member）中在MS.Internal.Documents.Application.ChainOfDependencies</code>1.OrderByLeastDependent（T member，Action action）中在MS.Internal.Documents.Application.DocumentManager.OrderByLeastDependent（DispatchDelegate action，Document document）中在MS.Internal.Documents.Application.DocumentManager.Open（Document document）中在MS.Internal.AppModel.ApplicationProxyInternal.InitContainer（）中在MS.Internal.AppModel.ApplicationProxyInternal.Run（InitData initData）

- Kumar

1个回答

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- user167073 · Accepted Answer

我猜问题出在字节没有完全写入响应中。尝试以下方法，希望能解决问题。

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();