View 不能被多个 Listview 共享

Question

我遇到了很多其他人以前遇到过的问题。我尝试使用一种样式，其中包含由多个控件组成的 GridView。

我在网上搜索了答案，得到了两个解决方案：

将 StaticResource 更改为 DynamicResource
在 GridView

我尝试了两种解决方案（甚至同时尝试），但是当我将样式应用到第二个控件时错误仍然出现。

样式是这样的

<Style x:Key="MyCustomStyle" TargetType="{x:Type MyUserControl}" BasedOn="{StaticResource MyUserControlBaseStyle}">
    <Setter Property="Watermark" Value="{x:Static LabelResources.Caption}"/>
    <Setter Property="ErrorText" Value="{Binding Converter={StaticResource FormatStringConverter}, ConverterParameter={x:Static LabelResources.Caption}}"/>
    <Setter Property="LookupTemplate">
        <Setter.Value>
            <DataTemplate DataType="{x:Type LookupResult}">
                <StackPanel Orientation="Horizontal">
                    <TextBlock Text="{Binding Name}" Margin="0,0,2,0"/>
                </StackPanel>
            </DataTemplate>
        </Setter.Value>
    </Setter>

    <Setter Property="SuggestionsView" Value="{DynamicResource CustomGridView}"/>
</Style>

这里是 GridView

<GridView x:Key="CustomGridView" x:Shared="False">
    <GridViewColumn Header="{x:Static resources:LabelResources.Name}" Width="Auto" HeaderContainerStyle="{DynamicResource GridViewHeaderStyle}">
        <GridViewColumn.CellTemplate>
            <DataTemplate>
                <TextBlock Text="{Binding Name}" HorizontalAlignment="Left"/>
            </DataTemplate>
        </GridViewColumn.CellTemplate>
    </GridViewColumn>             
</GridView>

我能做什么？

Answer 1

听起来您只创建了一个 CustomGridView 实例，而您正试图将其分配到多个位置，这导致了异常。

根据MSDN page on x:Shared

In WPF, x:Shared is only valid under the following conditions:

The ResourceDictionary that contains the items with x:Shared must be compiled. The ResourceDictionary cannot be within loose XAML or used for themes.

The ResourceDictionary that contains the items must not be nested within another ResourceDictionary. For example, you cannot use x:Shared for items in a ResourceDictionary that is within a Style that is already a ResourceDictionary item.

我不太确定编译的 ResourceDictionary 是什么意思，但您可以尝试将构建操作更改为页面而不是资源，例如 this answer suggests。

如果您无法使 x:Shared 正常工作，那么或许可以考虑将 SuggestionsView 改为 ContentTemplate 或 DataTemplate，这样每次使用它都会创建自己的 GridView .

<ContentTemplate x:Key="CustomGridView">
    <GridView>
        <GridViewColumn Header="{x:Static resources:LabelResources.Name}" Width="Auto" HeaderContainerStyle="{DynamicResource GridViewHeaderStyle}">
            <GridViewColumn.CellTemplate>
                <DataTemplate>
                    <TextBlock Text="{Binding Name}" HorizontalAlignment="Left"/>
                </DataTemplate>
            </GridViewColumn.CellTemplate>
        </GridViewColumn>             
    </GridView>
</ContentTemplate>

View 不能被多个 Listview 共享

View can't be shared by more than one Listview

wpf

share

listview

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