[英]change TextBox readonly by clicking on ListBoxItem
I have a TextBox
inside a ListBoxItem
which is disabled so I can drag and drop it in the ListBox
. 我在一个禁用的
ListBoxItem
有一个TextBox
,因此可以将其拖放到ListBox
。
Once I double click it I want it to be Enabled
so I can edit the Text
and when I'm done I want it do be Disabled
again to do drag and drop. 双击它后,我希望将其
Enabled
以便编辑Text
,完成后,我希望再次将其Disabled
以进行拖放。
I have the MouseDoubleClick
event on the ListBoxItem
but it doesn't change the TextBox ReadOnly
. 我在
ListBoxItem
上有MouseDoubleClick
事件,但它不会更改TextBox ReadOnly
。 Can anybody tell me how to achieve this. 谁能告诉我如何实现这一目标。
at the moment TextBox
returns null. 目前,
TextBox
返回null。 seems like I don't get access to it the way I'm trying. 好像我无法以尝试的方式访问它。
XAML XAML
<ListBox Name="Locations" Cursor="Hand" HorizontalAlignment="Left" Height="351" Margin="10,48,0,0" VerticalAlignment="Top" Width="285" ItemsSource="{Binding Locations}" dd:DragDrop.IsDragSource="True"
dd:DragDrop.IsDropTarget="True" SelectedItem="{Binding SelectedItem}">
<ListBox.ItemContainerStyle>
<Style TargetType="{x:Type ListBoxItem}" BasedOn="{StaticResource {x:Type ListBoxItem}}">
<EventSetter Event="MouseDoubleClick" Handler="ListBoxItem_MouseDoubleClick"/>
</Style>
</ListBox.ItemContainerStyle>
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal">
<TextBox Name="textBox" Text="{Binding Path=Name}" IsHitTestVisible="False" Width="270" Background="Transparent" BorderThickness="0" Margin="2"/>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
In View 视野中
private void ListBoxItem_MouseDoubleClick(object sender, MouseButtonEventArgs e)
{
ListBoxItem item = sender as ListBoxItem;
textBox.IsReadOnly = false;
}
That's because the textbox "doesn't exists" in the visual tree, WPF creates one for each listitem when needed, so you never have a reference to it. 那是因为文本树在视觉树中“不存在”,WPF在需要时为每个列表项创建一个,因此您永远都没有对它的引用。 It is possible to navigate the visual tree and get the textbox reference but I advise against it, instead, create a property in your item model, something like "EditMode" that when you set it to true, the textbox will enable through the binding of the IsEnabled property.
可以导航视觉树并获取文本框引用,但我建议您不要这样做,而是在项目模型中创建一个属性,例如“ EditMode”,当您将其设置为true时,文本框将通过绑定IsEnabled属性。
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