如何在WPF中打印UserControl的集合？

Question

说我有以下小UserControl:

<StackPanel>
   <TextBlock Text="{Binding Title, StringFormat=Name: {0}}" FontWeight="Bold"/>
   <Separator/>
   <ItemsControl ItemsSource="{Binding Items}">
      <ItemsControl.ItemTemplate>
         <DataTemplate>
            <TextBlock Text="{Binding Path=. ,StringFormat=Detail: {0}}"/>
         </DataTemplate>
      </ItemsControl.ItemTemplate>
  </ItemsControl>
  <Line Stroke="Black" HorizontalAlignment="Stretch" Margin="0,10"
                X2="{Binding ActualWidth, RelativeSource={RelativeSource Self}}"
                StrokeDashArray="2 2" StrokeThickness="1" />
</StackPanel>

我的应用程序将生成这些控件的集合,然后应该使用自动分页打印它们.ItemsControl变量中显示的项目数.我抨击网络,阅读关于在Pro WPF 4.5 Unleashed中打印的章节,但我仍然看不到如何实现这一点.

任何指导都非常欢迎.

编辑:欢迎任何指导.由于我在视图模型中可以获得数据,因此将数据重定向到其他地方并不困难.但是哪里？

Answer 1

由于我们没有您的代码并且我们不知道您的数据，因此很难理解您到底在哪里，但是这里有一个简单的示例：

<Window x:Class="WpfApplication1.PrintVisualDemo"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Print Visual Demo" Height="350" Width="300">
<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="0.9*" />
        <RowDefinition Height="0.2*"/>
    </Grid.RowDefinitions>
    <StackPanel Name="printPanel"
                Grid.Row="0"
                Margin="5">
        <Label Content="Sweet Baby"
            HorizontalAlignment="Center"
            FontSize="40"
            FontFamily="Calibri">
            <Label.Foreground>
                <LinearGradientBrush Opacity="1" 
                     StartPoint="0,0.5" EndPoint="1,0.5">
                    <LinearGradientBrush.GradientStops>
                        <GradientStop Color="Blue" Offset="0" />
                        <GradientStop Color="Red" Offset="0.5" />
                        <GradientStop Color="Green" Offset="1" />
                    </LinearGradientBrush.GradientStops>
                </LinearGradientBrush>
            </Label.Foreground>
        </Label>
        <Image Source="D:\Temp\baby.jpg"
                Height="150"
                Width="200">
        </Image>
    </StackPanel>
    <Button Content="Print"
                Grid.Row="1" Margin="5"
                Height="40" Width="150"
                HorizontalAlignment="Center"
                VerticalAlignment="Center" Click="Button_Click" />
</Grid>
</Window>


private void Button_Click(object sender, RoutedEventArgs e)
{
    PrintDialog pd = new PrintDialog();
    if (pd.ShowDialog() != true) return;
    pd.PrintVisual(printPanel, "Printing StackPanel...");
}

PrintVisual 方法应该可以完成这项工作。

如果您想缩放视觉效果以适合页面，您可以按照以下步骤操作：

PrintDialog printDlg = new System.Windows.Controls.PrintDialog();
if (printDlg.ShowDialog() == true)
   {
      //get selected printer capabilities
      System.Printing.PrintCapabilities capabilities = printDlg.PrintQueue.GetPrintCapabilities(printDlg.PrintTicket);

     //get scale of the print wrt to screen of WPF visual
     double scale = Math.Min(capabilities.PageImageableArea.ExtentWidth / this.ActualWidth, capabilities.PageImageableArea.ExtentHeight /
                    this.ActualHeight);

     //Transform the Visual to scale
     this.LayoutTransform = new ScaleTransform(scale, scale);

     //get the size of the printer page
     Size sz = new Size(capabilities.PageImageableArea.ExtentWidth, capabilities.PageImageableArea.ExtentHeight);

     //update the layout of the visual to the printer page size.
     this.Measure(sz);
     this.Arrange(new Rect(new Point(capabilities.PageImageableArea.OriginWidth, capabilities.PageImageableArea.OriginHeight), sz));

      //now print the visual to printer to fit on the one page.
      printDlg.PrintVisual(this, "First Fit to Page WPF Print");

}

正如您所看到的，您需要做的就是重新测量并使用新尺寸重新排列特定元素，然后您可以调用 PrintVisual 方法。

我希望这对您有进一步的帮助。考虑发布更多代码或将您的项目上传到网上某处。