【发布时间】：2012-08-07 15:11:02
【问题描述】：
我不喜欢在此处粘贴相当长的代码 sn-ps，但我对以下 WPF UserControl（本文末尾的 XAML）有疑问。提供的代码经过简化，但我对其进行了测试，它是可重现的。
这个 UserControl 的问题是，当添加到 WPF 窗口时，水平调整大小非常慢。更准确地说，当窗口的宽度增加时，调整大小的速度与预期一样快。但是，一旦它的宽度减小，包含的 UserControl 就会挂起并且只会非常缓慢地调整大小。在我的 PC 上，大约需要 3 秒才能达到最终大小。
我现在的问题： 为什么会这样，我该怎么办？有了这个简化的控件，可能问题不大，但是如果两个 ListView 都填满了，操作就更慢了。 这是 WPF 本身的问题还是 XAML 中有错误？我不知道。任何提示/解决方案/解决方法/cmets 表示赞赏！ :-) 谢谢！
<UserControl x:Class="TestApplication.UserControl1"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
d:DesignHeight="768" d:DesignWidth="1280" mc:Ignorable="d">
<UserControl.Resources>
<ResourceDictionary>
<!-- [removed for clarity] -->
</ResourceDictionary>
</UserControl.Resources>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="{Binding ElementName='uiCustomerOrderListView', Path='ActualWidth'}" />
<ColumnDefinition Width="5" />
<ColumnDefinition Width="{Binding ElementName='uiPackagingOrderListView', Path='ActualWidth'}" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Label
BorderBrush="Black"
BorderThickness="1"
Content="Customer Orders"
FontWeight="Bold"
Grid.Column="0"
Grid.Row="0"
HorizontalContentAlignment="Center"
Margin="0,0,0,2"
SnapsToDevicePixels="True"
VerticalContentAlignment="Center" />
<Label
BorderBrush="Black"
BorderThickness="1"
Content="Packaging Orders"
FontWeight="Bold"
Grid.Column="2"
Grid.Row="0"
HorizontalContentAlignment="Center"
Margin="0,0,0,2"
SnapsToDevicePixels="True"
VerticalContentAlignment="Center" />
<Grid
Grid.Column="0"
Grid.Row="1">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="4" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="4" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBlock
x:FieldModifier="private"
x:Name="uiCustomerOrdersColumn00HeaderTextBlock"
FontWeight="Bold"
Grid.Column="1"
Grid.Row="0"
Text="[Order No.]"
TextAlignment="Center"
TextTrimming="CharacterEllipsis"
ToolTip="" />
<!-- [similar TextBlocks for columns 2, 3, 4, 5, 6] -->
<!-- [removed for clarity] -->
</Grid>
<Grid
Grid.Column="2"
Grid.Row="1">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="4" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="*" />
<ColumnDefinition Width="4" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBlock
x:FieldModifier="private"
x:Name="uiPackagingOrdersColumn00HeaderTextBlock"
FontWeight="Bold"
Grid.Column="1"
Grid.Row="0"
Text="[Order Nr.]"
TextAlignment="Center"
TextTrimming="CharacterEllipsis"
ToolTip="" />
<!-- [similar TextBlocks for columns 2, 3, 4, 5, 6, 7] -->
<!-- [removed for clarity] -->
</Grid>
<Border
BorderBrush="Black"
BorderThickness="0,2,0,0"
Grid.Column="0"
Grid.ColumnSpan="4"
Grid.Row="2"
Margin="1,1,1,1"
SnapsToDevicePixels="True" />
<ScrollViewer
Grid.Column="0"
Grid.ColumnSpan="4"
Grid.Row="3"
HorizontalScrollBarVisibility="Disabled"
VerticalScrollBarVisibility="Visible">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="5" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<ListView
x:FieldModifier="private"
x:Name="uiCustomerOrderListView"
Grid.Column="0"
Grid.Row="1"
ItemsSource="{Binding Path='.'}"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
ScrollViewer.VerticalScrollBarVisibility="Disabled"
SelectionMode="Single"
VirtualizingStackPanel.IsVirtualizing="False">
<ListView.View>
<GridView
x:FieldModifier="private"
x:Name="uiCustomerOrderGridView"
AllowsColumnReorder="False">
<GridView.Columns>
<GridViewColumn />
<GridViewColumn />
<GridViewColumn />
<GridViewColumn />
<GridViewColumn />
<GridViewColumn />
</GridView.Columns>
</GridView>
</ListView.View>
</ListView>
<ListView
x:FieldModifier="private"
x:Name="uiPackagingOrderListView"
Grid.Column="2"
Grid.Row="1"
ItemsSource="{Binding Path='.'}"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
ScrollViewer.VerticalScrollBarVisibility="Disabled"
SelectionMode="Single"
VirtualizingStackPanel.IsVirtualizing="False">
<ListView.View>
<GridView
x:FieldModifier="private"
x:Name="uiPackagingOrderGridView"
AllowsColumnReorder="False">
<GridView.Columns>
<GridViewColumn />
<GridViewColumn />
<GridViewColumn />
<GridViewColumn />
<GridViewColumn />
<GridViewColumn />
<GridViewColumn />
</GridView.Columns>
</GridView>
</ListView.View>
</ListView>
</Grid>
</ScrollViewer>
</Grid>
</UserControl>
【问题讨论】：
标签： wpf xaml user-controls resize