我有一个基本窗口，它充当UserControls的通用容器。它按预期工作，除了宽度和高度似乎不是由子项的大小决定的（宽度和高度设置为auto，我希望）。基本窗口的xaml如下：
<local:BaseView x:Class="Program.UI.Views.BaseWindowView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:local="clr-namespace:Program.UI.Views"
xmlns:converters="clr-namespace:Program.UI.Converters"
xmlns:presenter="clr-namespace:Program.Presenter"
xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
mc:Ignorable="d"
ResizeMode="NoResize" WindowStyle="None"
d:DesignHeight="300" d:DesignWidth="300" AllowsTransparency="True">
<i:Interaction.Triggers>
<i:EventTrigger EventName="Closing">
<presenter:EventToCommand Command="{Binding Mode=OneWay, Path=CloseWindow}" PassEventArgsToCommand="True"/>
</i:EventTrigger>
</i:Interaction.Triggers>
<local:BaseView.Resources>
<ResourceDictionary>
<converters:BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" />
<converters:SystemEventToForegroundColor x:Key="SystemEventToForegroundColor" />
<ResourceDictionary.MergedDictionaries>
<ResourceDictionary Source="/Program;component/UI/Templates/Generic.xaml"/>
</ResourceDictionary.MergedDictionaries>
</ResourceDictionary>
</local:BaseView.Resources>
<local:BaseView.Foreground>
<SolidColorBrush Color="Black" Opacity="100"/>
</local:BaseView.Foreground>
<local:BaseView.Background>
<SolidColorBrush Color="White" Opacity="0"/>
</local:BaseView.Background>
<Border BorderBrush="#FF838383" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" BorderThickness="1" Height="auto" Width="auto" Margin="0,0,5,5">
<Canvas Background="#E8F6F6" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Height="auto" Width="auto">
<Canvas.Effect>
<DropShadowEffect RenderingBias="Quality" Opacity="0.3" ShadowDepth="3" BlurRadius="4"/>
</Canvas.Effect>
<DockPanel VerticalAlignment="Stretch" HorizontalAlignment="Stretch"
Margin="0,0,0,0" x:Name="ReferenceInfo" Canvas.Left="0" Canvas.Top="0"
Width="{Binding ActualWidth, ElementName=InfoCanvas}"
Height="{Binding ActualHeight, ElementName=InfoCanvas}"
d:DesignWidth="294"
d:DesignHeight="294">
<Grid Width="auto" Height="auto" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<Grid.RowDefinitions>
<RowDefinition Height="Auto"/>
<RowDefinition Height="Auto"/>
</Grid.RowDefinitions>
<Grid Grid.Row="0" Width="auto" HorizontalAlignment="Stretch" Height="30" VerticalAlignment="Top">
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition Width="30" />
</Grid.ColumnDefinitions>
<Border Grid.Column="0" BorderBrush="#FF838383" BorderThickness="0,0,0,1" Height="30" VerticalAlignment="Top">
<Label Style="{StaticResource WindowHeaderControlTitle}" MouseDown="Label_MouseDown"/>
</Border>
<Border Grid.Column="1" BorderBrush="#FF838383" BorderThickness="1,0,0,1">
<Label Style="{StaticResource WindowHeaderControlCloseLabel}" MouseEnter="Label_MouseEnter" MouseLeave="Label_MouseLeave" MouseLeftButtonUp="Label_MouseLeftButtonUp" MouseLeftButtonDown="Label_MouseLeftButtonDown" FontSize="14" FontFamily="Segoe UI Black" FontStretch="UltraExpanded" Content="X"/>
</Border>
</Grid>
<ItemsControl Grid.Row="1" Height="auto" Width="auto" ItemsSource="{Binding ChildView}"/>
</Grid>
</DockPanel>
</Canvas>
</Border>
视图是在Excel功能区按钮的单击事件上生成的，其代码隐藏为：
var childView = new DatapointDefinitionsView();
childView.DataContext = new DatapointDefinitionsViewModel();
ApplicationData.Presenter.ShowView<BaseWindowView>(
new BaseWindowViewModel(childView, ApplicationData.Presenter), true);
ShowView代码是：
private BaseWindowView _windowView;
public void ShowView<T>(BaseWindowViewModel viewModel, bool asModal) where T : BaseWindowView, new()
{
_windowView = new T
{
DataContext = viewModel,
ShowInTaskbar = false,
Title = viewModel.Caption,
};
//Width = viewModel.ChildView[0].Width,
//Height = viewModel.ChildView[0].Height
if (asModal)
{
_windowView.ShowDialog();
_windowView = null;
}
else
{
_windowView.Show();
}
}
将宽度和高度明确设置为子高度会将宽度设置为指定的宽度，但不会影响高度。但是，即使它确实如此，这也不是一个令人满意的解决方案，因为它意味着值是固定的，并且如果用户控件尺寸发生变化则不会更新。
还有另一种方法可以达到我的目的吗？
答案 0 :(得分：0)
所以我最终能够解决这个问题，具有所有所需的功能，如下所示：
我将画布高度（在xaml中）绑定到DockPanel的高度
Height="{Binding ElementName=ReferenceInfo, Path=ActualHeight}"
但是ItemsControl元素的宽度
Width="{Binding ElementName=ChildUserControl, Path=ActualWidth}"
我从DockPanel中删除了高度和宽度，并根据@lokusking早先的建议重新启用了SizeToContent="WidthAndHeight"窗口属性。
为了启用CanResizeWithGrip功能（并且让子usercontrol的内容相应地动态调整大小），我挂钩了窗口SizeChanged事件并添加了以下代码：
private void BaseView_SizeChanged(object sender, SizeChangedEventArgs e)
{
var window = sender as Window;
if (ChildUserControl.HasItems)
{
var chlidControl = ChildUserControl.Items[0] as UserControl;
var context = (BaseWindowViewModel)window.DataContext;
// Ignore the first 3 resize events - these occur on view generation
if (!context.InitialResizeComplete)
if (context.ResizeOperations < 3)
{
context.ResizeOperations++;
return;
}
context.InitialResizeComplete = true;
// Subtract all fixed size elements from window dimensions
chlidControl.Width = window.ActualWidth - (OuterBorder.BorderThickness.Left + OuterBorder.BorderThickness.Right + OuterBorder.Margin.Right + OuterBorder.Margin.Left);
chlidControl.Height = window.ActualHeight - (OuterBorder.BorderThickness.Top + OuterBorder.BorderThickness.Bottom + OuterBorder.Margin.Top + OuterBorder.Margin.Bottom + TaskBarGrid.Height);
}
}
我还没决定最初的3个调整大小操作的驱动因素。我的第一个猜测是初始化，然后是x，然后是y - 但是反思它可能是1为baseview，1为basewindow，1为usercontrol。如果是这种情况，那么使用这种方法附加的用户控件本身有多个视图可能会出现问题，但我还没有测试过。
希望有人能发现这有用，感谢那些提供帮助的人。