我正在尝试打印包含单个Window的{{1}}。当在屏幕上显示时，正确显示红色的验证错误边框。通过TextBox打印时，缺少边框。该窗口定义为：
PrintDialog请注意它如何用作public partial class ReportPage : INotifyDataErrorInfo
{
public ReportPage()
{
DataContext = this;
SomeText = "hi there";
InitializeComponent();
}
public string SomeText { get; set; }
public IEnumerable GetErrors(string propertyName)
{
return propertyName == "SomeText" ? new [] {"some error"} : null;
}
public bool HasErrors => true;
public event EventHandler<DataErrorsChangedEventArgs> ErrorsChanged;
}
，视图模型和错误实现。它指定lone属性SomeText错误。相应的XAML如下：
Window要打印<Window x:Class="ReportPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">
<Grid x:Name="MainContent" VerticalAlignment="Center" HorizontalAlignment="Center">
<TextBox x:Name="MyText" Text="{Binding SomeText}"/>
</Grid>
</Window>
的内容，请使用：
Window我看到var printDialog = new PrintDialog { PrintTicket = { PageOrientation = PageOrientation.Portrait } };
printDialog.ShowDialog();
var caps = printDialog.PrintQueue.GetPrintCapabilities(printDialog.PrintTicket);
var rect = new Rect(new Point(caps.PageImageableArea.OriginWidth, caps.PageImageableArea.OriginHeight),
new Size(caps.PageImageableArea.ExtentWidth, caps.PageImageableArea.ExtentHeight));
var pageSize = rect.Size;
var origin = rect.TopLeft;
var fullSize = new Size(printDialog.PrintTicket.PageMediaSize.Width.Value,
printDialog.PrintTicket.PageMediaSize.Height.Value);
var page = new ReportPage
{
Margin = new Thickness(
Math.Max(72 - origin.X, 0),
Math.Max(48 - origin.Y, 0),
Math.Max(72 - (fullSize.Width - pageSize.Width - origin.X), 0),
Math.Max(96 - (fullSize.Height - pageSize.Height - origin.Y), 0))
};
page.MainContent.Measure(pageSize);
page.MainContent.Arrange(new Rect(origin, pageSize));
page.MainContent.UpdateLayout();
printDialog.PrintVisual(page.MainContent, "some description");
很好，但没有红色边框。我尝试在MainContent TextBox周围添加<AdornerDecorator>无济于事。在屏幕上显示Grid导致红色边框可见而不是打印时会发生什么？
答案 0 :(得分：0)
首先，在不显示Window的情况下不会呈现装饰。为了解决这个问题，Window在打印之前会在屏幕外显示（{Left / Top被任意设置为-10000，而ShowInTaskbar / ShowActivated是设置为false）：
page.Show();
page.MainContent.Measure(pageSize);
page.MainContent.Arrange(new Rect(origin, pageSize));
page.MainContent.UpdateLayout();
printDialog.PrintVisual(page.MainContent, "some description");
第二，仅打印MainContent时没有装饰层，因此必须添加一层（请参见XPS Printing of an Adorner：
<Window x:Class="ReportPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
ShowInTaskbar="False"
Left="-10000"
Top="-10000"
ShowActivated="False">
<Window.Resources>
<Style TargetType="{x:Type ContentControl}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ContentControl}">
<AdornerDecorator>
<ContentPresenter
Content="{TemplateBinding Content}"
ContentTemplate="{TemplateBinding ContentTemplate}" />
</AdornerDecorator>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</Window.Resources>
<ContentControl x:Name="MainContent" VerticalAlignment="Center" HorizontalAlignment="Center">
<TextBox x:Name="MyText" Text="{Binding SomeText}"/>
</Grid>
</Window>