我在尝试查找DataTemplate中声明的元素时遇到了一个问题,之后该元素像ContentTemplate一样应用于TabItem对象。
我看到在这个问题上已经有了一些解决方案,但在我的情况下,没有一个真正起作用,我想了解为什么(显然我在某些地方犯了错误)
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>
此代码按语法按以下方式应用于给定的TabItem对象:
this.ContentTemplate = FindResource("TabItemDataTemplate") as DataTemplate;
在我需要访问DataTemplate中声明的ListView元素之后,我执行在internet上以及在这个站点上找到的代码。下面是一个简短的例子:
/* 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的值为Null,因此代码执行崩溃。
问题2:好的,我想,可能我需要直接导航项目内容,所以代码或多或少会变成:
/* 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);
是TabItem对象。但是strage的东西,它的内容模板
这
与上面指定的完全不同。我肯定我遗漏了什么,你能帮我解决这个问题吗?
非常感谢。
