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POShow/Hide items in itemscontrol on condition
 

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    <p>I have an Itemscontrol that I am using to display a list of start information sent from a timing system.</p> <p>I need to be able to "switch off"/stop displaying a set of lane info if the lane number isn't showing (if it's null or a blank) and then if the timer sends info to switch the lane back on then show the data again.</p> <p>I can't set it to just delete everything because the timer sends its information constantly and everything except the lane number would reappear again.</p> <p>Is it possible to show/hide items on condition?</p> <p>What is currently happening</p> <pre><code>Lanes 1 ------ 2 ------ ------ &lt;- other info remains 4 ------ </code></pre> <p>What I want to happen</p> <pre><code>Lanes 1 ------ 2 ------ 4 ------ </code></pre> <p>Here is a sample of my itemscontrol code</p> <pre><code>&lt;ItemsControl ItemsSource="{Binding CHeat.SwimList}" Margin="10,0" HorizontalAlignment="Left" VerticalAlignment="Top"&gt; &lt;ItemsControl.Template&gt; &lt;ControlTemplate TargetType="ItemsControl"&gt; &lt;StackPanel&gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;Label Content="Lane" /&gt; &lt;Label Content="Pos" /&gt; &lt;Label Content="Swimmer" /&gt; &lt;Label Content="Club" /&gt; &lt;Label Content="Time" /&gt; &lt;/StackPanel&gt; &lt;ItemsPresenter/&gt; &lt;/StackPanel&gt; &lt;/ControlTemplate&gt; &lt;/ItemsControl.Template&gt; &lt;ItemsControl.ItemsPanel&gt; &lt;ItemsPanelTemplate&gt; &lt;StackPanel/&gt; &lt;/ItemsPanelTemplate&gt; &lt;/ItemsControl.ItemsPanel&gt; &lt;ItemsControl.ItemTemplate&gt; &lt;DataTemplate&gt; &lt;StackPanel Orientation="Horizontal"&gt; &lt;Grid&gt; &lt;Grid.ColumnDefinitions&gt; &lt;ColumnDefinition Width="35" /&gt; &lt;ColumnDefinition Width="30" /&gt; &lt;ColumnDefinition Width="150" /&gt; &lt;ColumnDefinition Width="50" /&gt; &lt;ColumnDefinition Width="80" /&gt; &lt;/Grid.ColumnDefinitions&gt; &lt;Label Grid.Column="0" Content="{Binding LaneNumber}" /&gt; &lt;Label Grid.Column="1" Content="{Binding Position}" /&gt; &lt;Label Grid.Column="2" Content="{Binding Swimmer}" /&gt; &lt;Label Grid.Column="3" Content="{Binding Club}" /&gt; &lt;Label Grid.Column="4" Content="{Binding Time}" /&gt; &lt;/Grid&gt; &lt;/StackPanel&gt; &lt;/DataTemplate&gt; &lt;/ItemsControl.ItemTemplate&gt; &lt;/ItemsControl&gt; </code></pre> <p>If there was a way I could set <code>Content = ""</code> for the other data based off the LaneNumber then I believe it could work, because then I can just bring back the bindings.</p> <p>I'm fairly new to WPF so extra detail would be helpful many thanks!</p>
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    1. CO`Is it possible to show/hide items on condition?` -> Yes it's called `Triggers` has multiple types. For your case, you could be using a `DataTrigger` to check if the Lane number is null/empty and if so set the `Visibility` of that item to `Hidden`. just google to see examples for `DataTrigger`. Also if your new to WPF, `Label` has a specific purpose in WPF. It does a whole load more than just display "text", if you're just after showing text, use a `TextBlock`. Also check some example's for WPF Layout's. What you're doing isn't "wrong" but could be done better.
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    2. CO@Viv Thanks I'll see what I can come up with that should work. In what way do you think I could improve the layout? It is a WIP so it looks a bit all over the place at the moment but I was more concerned about it being functional.
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    3. COYou're welcome. As for the layout, say things like in the `DataTemplate` why nest a `Grid` inside a `StackPanel` when it's the only child. Also Fixed Width's in WPF is frowned upon **unless** essential. In your case you got the column size's fixed and thus it ain't scalable. You could use "*" based multipliers to allocate space for Grid control's based on a percentage of what's available. If you just need fixed dimension, you might as well specify the Width on the item's and get rid of the `Grid`. You ain't going to get it all in a day, If you're tryin that's good enough. Just keep refining.
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