问题描述
我只是问了一个类似的问题,但我注意到我的不好,我需要隐藏整行,而不仅仅是文本块.让我解释一下发生了什么.所以我有一个具有这种结构的 ListBox:
I just ask a similar question but I noticed for my bad, I need to hide the entire row and not only the textblock. Let me explain what happen. So I've a ListBox with this structure:
<ListBox VerticalAlignment="Stretch"
ItemsSource="{Binding EventInfo}">
<ListBox.ItemTemplate>
<DataTemplate>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="100"/>
<ColumnDefinition Width="20"/>
</Grid.ColumnDefinitions>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<TextBlock Text="Event:" FontWeight="Bold" Grid.Column="0" Grid.Row="0"/>
<TextBlock Text="{Binding Name}" FontWeight="Bold" Grid.Column="1" Grid.Row="0"/>
<TextBlock Text="Foo:" FontWeight="Bold" Grid.Column="0" Grid.Row="1"/>
<TextBlock Text="{Binding Foo}" FontWeight="Bold" Grid.Column="1" Grid.Row="1"/>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
所以我需要做的是用空值或空值隐藏包含 textblock
/s 的所有行,实际上我在纯 xaml 中像这样管理它:
so what I need to do is hide all the rows that contains the textblock
/s with a null or empty value, actually I managed this in pure xaml like this:
<ListBox.Resources>
<Style TargetType="TextBlock">
<Style.Triggers>
<Trigger Property="Text" Value="">
<Setter Property="Visibility" Value="Collapsed" />
</Trigger>
<Trigger Property="Text" Value="{x:Null}">
<Setter Property="Visibility" Value="Collapsed" />
</Trigger>
</Style.Triggers>
</Style>
</ListBox.Resources>
但这不是一个好的解决方案.事实上,你怎么能看到我已经按行和列组织了每个 textblock
,所以我需要隐藏包含具有空值的文本块的行.
but this is not a good solution. Infact, how you can see I've each textblock
organized by row and column, so I need to hide the row that contain the textblock with the null value.
在我的解决方案中,我只隐藏具有空值的文本块,这是无用的,因为该值已经为空或为空.
With my solution, I only hide the textblock with null value, that is useless 'cause the value is already empty or null.
有机会通过xaml管理吗?我不知道如何在 xaml 中执行此操作,因为例如,如果我在中间隐藏一行,我将获得一个包含非空值文本块的行的空白区域.我不知道情况是否清楚.
There is a chance to manage it through xaml? I've no idea how can I do this in xaml, 'cause if I hide a row in the middle for example, I'll get a blank space with the row that contains textblocks with not null value. I don't know if the situation is clear.
如果有什么不清楚的,请提问,我会尽量解释得更好.谢谢.
If something is unclear, ask and I'll try to explain better. Thanks.
推荐答案
您可以相应地设置网格行高
You could set the Grid Row Height accordingly
替换
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
与
<Grid.RowDefinitions>
<RowDefinition>
<RowDefinition.Style>
<Style TargetType="RowDefinition">
<Style.Triggers>
<DataTrigger Binding="{Binding Name}" Value="">
<Setter Property="Height" Value="0" />
</DataTrigger>
<DataTrigger Binding="{Binding Name}" Value="{x:Null}">
<Setter Property="Height" Value="0" />
</DataTrigger>
</Style.Triggers>
</Style>
</RowDefinition.Style>
</RowDefinition>
<RowDefinition>
<RowDefinition.Style>
<Style TargetType="RowDefinition">
<Style.Triggers>
<DataTrigger Binding="{Binding Foo}" Value="">
<Setter Property="Height" Value="0" />
</DataTrigger>
<DataTrigger Binding="{Binding Foo}" Value="{x:Null}">
<Setter Property="Height" Value="0" />
</DataTrigger>
</Style.Triggers>
</Style>
</RowDefinition.Style>
</RowDefinition>
</Grid.RowDefinitions>
这篇关于如果文本块绑定值为空,则删除行的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!