Collat​​or不会打印第二个UserControl

Question

当我执行我的打印功能时，它只打印一页信息，第二页是空的。如果我一次打印一个用户控件，它可以工作。请问如何获取第二个用户控件打印信息呢？

单一控制（工作）

<ScrollViewer CanContentScroll="True" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto" Visibility="{Binding FedNorReportVisibility, Mode=TwoWay}">
    <StackPanel>
        <panes:PerformanceReportPage1 x:Name="FedNorReportGrid"></panes:PerformanceReportPage1>            
    </StackPanel>
</ScrollViewer>

两个控制器（不起作用）

<ScrollViewer CanContentScroll="True" VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto" Visibility="{Binding FedNorReportVisibility, Mode=TwoWay}">
    <StackPanel>
        <panes:PerformanceReportPage1 x:Name="FedNorReportGrid"></panes:PerformanceReportPage1>
        <panes:PerformanceReportPage2 x:Name="FedNorReportGrid2"></panes:PerformanceReportPage2>
    </StackPanel>
</ScrollViewer>

打印功能：

using (var doc = new XpsDocument("C:\\Users/UNKNOWN/Test2.xps", FileAccess.Write))
{
     var writer = XpsDocument.CreateXpsDocumentWriter(doc);
     var collator = writer.CreateVisualsCollator();

     collator.BeginBatchWrite();
     collator.Write(FedNorReportGrid);
     collator.Write(FedNorReportGrid2);
     collator.EndBatchWrite();
}

var doc2 = new XpsDocument("C:\\Users/UNKNOWN/Test2.xps", FileAccess.Read);

var seq = doc2.GetFixedDocumentSequence();

var window = new Window();
window.Content = new DocumentViewer {Document = seq};
window.ShowDialog();

有点奇怪。我可以打印第一个“Pane”的两页。第二个窗格不会显示我尝试的任何内容。使用

collator.Write(FedNorReportGrid);
collator.Write(FedNorReportGrid);

Answer 1

这有多愚蠢....如果我将每个窗格封装在他们自己的StackPanel中，它就可以工作....

<StackPanel>
    <StackPanel>
        <panes:PerformanceReportPage1 x:Name="FedNorReportGrid"></panes:PerformanceReportPage1>
    </StackPanel>
    <StackPanel>
        <panes:PerformanceReportPage2 x:Name="FedNorReportGrid2"></panes:PerformanceReportPage2>
    </StackPanel>
</StackPanel>