我试图找到DataTemplate中声明的元素一个问题,即后应用于像的ContentTemplate到TabItem的对象。 我看到已经有在这个问题方面的一些解决方案,但没有他们中的一个实际工作在我的情况,我想知道为什么(很明显,我在做一些错误的地方),下面是一个示例代码:
<DataTemplate x:Key="TabItemDataTemplate">
<Grid HorizontalAlignment="Stretch"
VerticalAlignment="Stretch" Name="templateGrid">
<Grid.RowDefinitions>
<RowDefinition Height="6.0*"> </RowDefinition>
<RowDefinition Height="6" ></RowDefinition>
<RowDefinition Height="6.0*" ></RowDefinition>
<RowDefinition Height="*" ></RowDefinition>
</Grid.RowDefinitions>
<ListView x:Name="repoView" Grid.Row="0"
VerticalAlignment="Stretch"
ItemsSource="{Binding Source={StaticResource DataProviderForListView}}">
<GridView>
<GridViewColumn Header="State"
DisplayMemberBinding="{Binding Path=RepositoryItemState}"/>
<GridViewColumn Header="Working Copy Rev num."
DisplayMemberBinding="{Binding Path=WCRevision}"/>
<GridViewColumn Header="Repository Rev num."
DisplayMemberBinding="{Binding Path=RepoRevision}"/>
<GridViewColumn Header="User"
DisplayMemberBinding="{Binding Path=Account}"/>
<GridViewColumn Header="Item"
DisplayMemberBinding="{Binding Path=ItemName}"/>
</GridView>
</ListView>
<GridSplitter x:Name="gridSplitter" Grid.Row="1"
ResizeDirection="Rows" Background="Gray"
Height="4" HorizontalAlignment="Stretch"
Style="{StaticResource gridSplitterStyle}"/>
<RichTextBox x:Name="rowView" Grid.Row="2"
BorderBrush="Bisque" VerticalAlignment="Stretch"
IsReadOnly="True" Background="YellowGreen"
FontFamily="Comic Sans Serif"/>
<ToggleButton x:Name="rbWorkingCopy"
Template="{StaticResource ToggleButtonControlTemplate}"
Grid.Row="3" Width="100" Height="22"
Content="{StaticResource WorkingCopyTitle}"
HorizontalAlignment="Left" VerticalAlignment="Bottom"
Command="repoManager:AppCommands.GetWorkingCopyInfoCommand" />
<ToggleButton x:Name="rbRepository"
Template="{StaticResource ToggleButtonControlTemplate}"
Grid.Row="3" Width="100" Height="22"
Content="{StaticResource RepositoryTitle}"
HorizontalAlignment="Left"
VerticalAlignment="Bottom" Margin="120,0,0,0"
Command="repoManager:AppCommands.GetRepoInfoCommand" />
<ProgressBar x:Name="checkRepositoryProgress" Grid.Row="3"
Width="220" Height="22" HorizontalAlignment="Right"
VerticalAlignment="Bottom" Margin="250,0,10,0"
IsIndeterminate="True"
IsEnabled="{Binding repoManager:ExecutingCommand}" />
</Grid>
</DataTemplate>
此代码porgrammatically施加到下面的方式在给定的TabItem对象:
this.ContentTemplate = FindResource("TabItemDataTemplate") as DataTemplate;
之后,我需要访问中的DataTemplate声明的ListView控件元素,所以我在执行围绕互联网上的代码,并在这个网站。 下面是一个简单的例子:
/* Getting the ContentPresenter of myListBoxItem*/
ContentPresenter myContentPresenter =
FindVisualChild<ContentPresenter>(this);
// this.GetVisualChild(0)
/* Finding textBlock from the DataTemplate that is set on that ContentPresenter*/
DataTemplate myDataTemplate = myContentPresenter.ContentTemplate;
ListView repoListView = (ListView)myDataTemplate.FindName("repoView",
myContentPresenter);
问题1:在这种情况下ContentPresenter的的ContentTemplate为Null,所以代码执行崩溃。 Prolem2:好吧,我想,可能是我需要直接导航抛TabItem的内容,所以代码变得或多或少:
/* Getting the ContentPresenter of myListBoxItem*/
ContentPresenter myContentPresenter =
FindVisualChild<ContentPresenter>(this);
// this.GetVisualChild(0)
/* Finding textBlock from the DataTemplate that is set on that ContentPresenter*/
DataTemplate myDataTemplate = this.ContentTemplate;
ListView repoListView = (ListView)myDataTemplate.FindName("repoView",
myContentPresenter);
这是TabItem的对象。 但strage的事情,那这将是的ContentTemplate从一个以上的分配完全不同。 我敢肯定,我错过了什么地方,你可以帮我找出这个问题? 谢谢。