如何自动分页 PDFsharp 文档？

Question

我正在尝试从 C# WPF 控件生成 PDF 文档。 这是我的。

结果出来一半我的对象，如何自动分页？
以下是我的代码：

System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() => fixedDoc = new FixedDocument()));
        System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() => fixedDoc1 = new FixedDocument()));
        System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() => pageContent = new PageContent()));
        System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() => pageContent1 = new PageContent()));
        System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() => fixedPage = new FixedPage()));
        System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() => fixedPage1 = new FixedPage()));

        var visual = Child as UIElement;
        System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() => (Content).Children.Remove(visual)));
        System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() => fixedPage.Children.Clear()));
        System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() => fixedPage.Children.Add(visual)));
        System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() => ((System.Windows.Markup.IAddChild)pageContent).AddChild(fixedPage)));
        System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() => fixedDoc.Pages.Add(pageContent)));

        // write to PDF file
        string tempFilename = "temp.Xps";
        File.Delete(tempFilename);
        XpsDocument xpsd = new XpsDocument(tempFilename, FileAccess.ReadWrite);
        XpsDocumentWriter xw = XpsDocument.CreateXpsDocumentWriter(xpsd);
        System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() => xw.Write(fixedDoc)));
        System.Windows.Application.Current.Dispatcher.Invoke(new System.Action(() => xpsd.Close()));
        filename = filepath + DateTime.Now.ToString("yyyyMMddHHmmss") + "-" + title_ + ".pdf";
        PdfSharp.Xps.XpsConverter.Convert(tempFilename, filename, 1);

        var visual2 = Child2 as UIElement;
        Application.Current.Dispatcher.Invoke(new Action(() => (Content).Children.Remove(visual2)));
        Application.Current.Dispatcher.Invoke(new Action(() => fixedPage1.Children.Clear()));
        Application.Current.Dispatcher.Invoke(new Action(() => fixedPage1.Children.Add(visual2)));
        Application.Current.Dispatcher.Invoke(new Action(() => ((System.Windows.Markup.IAddChild)pageContent1).AddChild(fixedPage1)));
        Application.Current.Dispatcher.Invoke(new Action(() => fixedDoc1.Pages.Add(pageContent1)));

        // write to PDF file
        string tempFilename2 = "temp2.Xps";
        File.Delete(tempFilename2);
        XpsDocument xpsd2 = new XpsDocument(tempFilename2, FileAccess.ReadWrite);
        XpsDocumentWriter xw2 = XpsDocument.CreateXpsDocumentWriter(xpsd2);
        Application.Current.Dispatcher.Invoke(new Action(() => xw2.Write(fixedDoc1)));
        Application.Current.Dispatcher.Invoke(new Action(() => xpsd2.Close()));
        filename2 = filepath + DateTime.Now.ToString("yyyyMMddHHmmss") + "-" + title_ + ".pdf";
        PdfSharp.Xps.XpsConverter.Convert(tempFilename2, filename2, 1);

Answer 1

PDFsharp 不自动分页。

我建议按照其他人的图表处理方式：只显示大的（10、20、30 左右），而将真正小的图表总结为“其他”。这样，图例将适合一页，并且您可以避免图表中出现“零宽度”饼图。

这并不是您问题的真正答案，但它是一种也符合良好做法的解决方法。