A have listbox
<ListBox>
<ListBox.ItemTemplate>
<DataTemplate>
<DockPanel>
<Button Content="{Binding name_trainer}" Tag="{Binding idPersonTrainer}" DockPanel.Dock="Top" HorizontalAlignment="Center">
</Button>
</DockPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<ListBox HorizontalContentAlignment="Center">
<ListBox.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding yourstuff}" FontSize="72"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel HorizontalAlignment="Center"/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
The accepted answer is right, however I needed a bit more:
not only to center, but also to horizontally stretch the items. Just changing HorizontalAlignment to Stretch didn't work, so, here's how it's done:
<ItemsPanelTemplate>
<StackPanel HorizontalAlignment="Stretch">
<StackPanel.Resources>
<Style TargetType="ListBoxItem">
<Setter Property="HorizontalContentAlignment" Value="Center"/>
</Style>
</StackPanel.Resources>
</StackPanel>
</ItemsPanelTemplate>
You may have to center the DockPanel, rather than the data inside it. I've seen this behavior with StackPanel, because the panel shrinks to the contents. The centering ends up working properly, but in the wrong context.
Related
enter image description here
Please check the image.
There is a checkbox in the template in the listbox, and I set the red background color in it.
When I click on the red checkbox works fine.
But when I click on the image black arrow, it is not checked.
How can I clear the whitespace and synchronize it with the checkbox?
I tried setting margin padding but couldn't solve it.
<ListBox x:Name="xList" Grid.Row="1" HorizontalContentAlignment="Stretch">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Orientation="Vertical" IsItemsHost="True" />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<Grid Background="red">
<CheckBox IsChecked="{Binding IsVisible, Mode=TwoWay}"
VerticalContentAlignment="Center"
Content="{Binding Header}"
Height="28" />
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Thank you for helping me.
Add this code to your ListBox:
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Setter Property="Padding" Value="0" />
</Style>
</ListBox.ItemContainerStyle>
This will set the Padding of the ListBoxItem container to 0. The result looks like this:
I have a problem with my ListBox in WPF. First of all, I have a horizontal ListBox with custom ItemTemplate. Now, I want to stretch the items, so that the items fits over the complete width of the ListBox. I tried things like setting the HorizontalContentAlignment to Stretch, but this still not working.
Here is my ItemTemplate:
<DataTemplate x:Key="ListViewStepTemplate">
<Grid VerticalAlignment="Stretch">
<TextBlock Text="{Binding Path=Title}"
FontSize="15"
HorizontalAlignment="Center"
VerticalAlignment="Center" />
<Image Height="16"
Width="16"
HorizontalAlignment="Right"
VerticalAlignment="Bottom"
Source="/images/Content/check_16x16.png"
Visibility="{Binding Path=IsDone, Converter={StaticResource BooleantoVisibilityConverter}, UpdateSourceTrigger=PropertyChanged}" />
</Grid>
</DataTemplate>
And this is my ListBox:
<ListBox DockPanel.Dock="Top"
ItemsSource="{Binding AllItemsList}"
SelectedItem="{Binding CurrentItem}"
ItemTemplate="{StaticResource ListViewStepTemplate}"
Height="60"
HorizontalContentAlignment="Stretch">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemContainerStyle>
<Style TargetType="{x:Type ListBoxItem}">
<Setter Property="IsEnabled" Value="{Binding IsEnabled, UpdateSourceTrigger=PropertyChanged}" />
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="Padding" Value="30 0" />
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
If there are 4 items, each item should have a width of 25%. If there are 5 items, each item should have a width of 20% and so on.
Is it possible to do what I want to do? I tried a lot of things now, but it does never work.
Instead of using StackPanel use UniformGrid
Provides a way to arrange content in a grid where all the cells in the grid have the same size.
and bind number of columns to number of items in the list and disable horizontal scrolling functionality.
<ListBox
...
ItemsSource="{Binding AllItemsList}"
ScrollViewer.HorizontalScrollBarVisibility="Disabled"
ScrollViewer.VerticalScrollBarVisibility="Disabled" >
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<UniformGrid Rows="1" Columns="{Binding AllItemsList.Count}"/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemContainerStyle>
<Style TargetType="{x:Type ListBoxItem}">
<!-- style -->
</Style>
</ListBox.ItemContainerStyle>
</ListBox>
Don't use a StackPanel, use an UniformGrid instead.
<ItemsPanelTemplate>
<UniformGrid Rows="1" Columns="{Binding DataContext.Count, RelativeSource={RelativeSource Self}}"/>
</ItemsPanelTemplate>
I am new to WPF/Xaml and searched for this issue I am facing but found it tough. Requesting some help on this.
I need to display usercontrols (DATABOUND) (horizontally) inside a panel/listview so that they wrap when the width of listview/panel is met, with a vertical scroll bar autoshown (as in figure).
so far I have this code.
<ListView Grid.Row="3"
ItemsSource="{Binding Controls}"
VerticalAlignment="Bottom" Background="{x:Null}" BorderBrush="{x:Null}"
>
<ListView.ItemsPanel>
<ItemsPanelTemplate>
<StackPanel Orientation="Horizontal" Margin="0,0,0,10"></StackPanel>
</ItemsPanelTemplate>
</ListView.ItemsPanel>
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="VerticalContentAlignment" Value="Bottom"/>
<Setter Property="Focusable" Value="False" />
</Style>
</ListView.ItemContainerStyle>
<!--<ListView.ItemTemplate>
<DataTemplate>
<ContentControl Content="{Binding}" VerticalContentAlignment="Bottom"/>
</DataTemplate>
</ListView.ItemTemplate>-->
</ListView>
I have even tried the below code. Yes, it wraps but no scrollbar appears!
<ItemsControl Grid.Row="3"
Width="100" Height="200"
ItemsSource="{Binding Controls}"
VerticalAlignment="Bottom" Background="{x:Null}" BorderBrush="{x:Null}"
>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Orientation="Horizontal" Margin="0,0,0,10"></WrapPanel>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
Note: I am okay with any control that makes this happens. Not necessarily be a listview.
To wrap items you need to set ItemsPanel to WrapPanel, like in second example, but you may need to disable horizontal scrolling on ListView:
<ListView ScrollViewer.HorizontalScrollBarVisibility="Disabled" .../>
also, if you want to use ItemsControl then ScrollViewer is not part of default Template, like for ListView, so you'll need to wrap in in ScrollViewer
<ScrollViewer Grid.Row="3">
<ItemsControl ...>
<!-- .... -->
</ItemsControl>
</ScrollViewer>
and don't forget to move Grid.Row="3" from ItemsControl definition to ScrollViewer
You were close :-)
Put your listview with a view panel that is a wrapanel inside your scrollviewer.
<ScrollViewer>
<ItemsSource="{Binding Controls}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel></WrapPanel>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</ScrollViewer>
You are using Wrap panel so you need to specify the width it supposed to take... since wrappanel is inside a items host control wrap panel itself cannot calculate the width.It will try to take all the width with respective to Orientation (in your case its horizontal)
Here is the sample code with list box as items host... in this code i have binded the wrappanel width to the actual width of the list box so that it will never take more width than the list box and also i disabled the horizontal scrolling which you don't need for horizontal orientation and vertical wrapping
Note: Make sure to change item template before using following code and it will work with all items hosts like ListView, ItemsControl...
<ListBox Width="500" Height="500" Name="listbox" ScrollViewer.HorizontalScrollBarVisibility="Disabled">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Orientation="Horizontal" Width="{Binding ActualWidth,ElementName=listbox}"></WrapPanel>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<Grid Height="100" Width="100">
<TextBlock Text="{Binding}" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</Grid>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
For ItemsControl
<ItemsControl Grid.Row="3"
Width="100" Height="200"
ItemsSource="{Binding Controls}"
VerticalAlignment="Bottom" Background="{x:Null}" BorderBrush="{x:Null}"
Name="listbox"
>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel IsItemsHost="True" Orientation="Horizontal" Width="{Binding ActualWidth,ElementName=listbox}"></WrapPanel>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.Template>
<ControlTemplate>
<ScrollViewer x:Name="ScrollViewer" Padding="{TemplateBinding Padding}">
<ItemsPresenter />
</ScrollViewer>
</ControlTemplate>
</ItemsControl.Template>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Grid Height="30" Width="30">
<TextBlock Text="{Binding}" VerticalAlignment="Center" HorizontalAlignment="Center"/>
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
I have a listbox using UniformGrid for the ItemsPanelTemplate. It is a list of photos. I want the photos to be centered horizontally in the center of each cell of the grid, but it seems that no matter what I do, the images are aligned to the left of each cell. Here is my current XAML:
<Border BorderThickness="2" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" DockPanel.Dock="Right">
<ListBox Name="PhotosListBox" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" ScrollViewer.HorizontalScrollBarVisibility="Disabled" ScrollViewer.VerticalScrollBarVisibility="Disabled">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<UniformGrid IsItemsHost="True" HorizontalAlignment="Center"/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<Image Source="{Binding Path=photo}" HorizontalAlignment="Center"/>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</Border>
As you can see, I have the Image control in the DataTemplate set to HorizontalAlignment="Center", which I thought would do it, but it's not working.
What am I doing wrong?
You need to set HorizontalContentAlignment to Stretch to first allow ListBoxItems to stretch to all available space so that inline control can be aligned at centre accordingly.
<ListBox>
<ListBox.ItemContainerStyle>
<Style TargetType="ListBoxItem">
<Setter Property="HorizontalContentAlignment" Value="Stretch"/>
</Style>
</ListBox.ItemContainerStyle>
...
</ListBox>
I have a collection of elements, each one with a name and a subcollection of image blobs.
I want to display an Accordion, with each item representing each of the MainElements. inside each element, I display the images in the subcollecion of said MainElement.
The Accordion gets resized by the user, so I use a wrappanel for presenting the images. When the accordion is wide enough, the images reorder themselves fitting as many as posible in each row.
the problem comes when the wrappanel only displays one image per row (because there's no space enough for more), the image list continues, but I can't see all the images, because they don't fit inside the control's height.
I need a vertical scrollbar to be displayed inside the AccordionItem so I can scroll down the image list.
So, here's my code:
<layoutToolkit:Accordion Width="Auto" Height="Auto" ItemsSource="{Binding MainElementCollection}">
<layoutToolkit:Accordion.ItemTemplate>
<DataTemplate>
<TextBlock Text="{Binding MainElementName}" />
</DataTemplate>
</layoutToolkit:Accordion.ItemTemplate>
<layoutToolkit:Accordion.ContentTemplate>
<DataTemplate>
<ItemsControl ItemsSource="{Binding SubElementCollection}" ScrollViewer.VerticalScrollBarVisibility="Auto" >
<ItemsControl.Template>
<ControlTemplate>
<controlsToolkit:WrapPanel />
</ControlTemplate>
</ItemsControl.Template>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Grid>
<Image Margin="2" Width="150" Source="{Binding PreviewImage, Converter={StaticResource ImageConverter}}" />
</Grid>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</DataTemplate>
</layoutToolkit:Accordion.ContentTemplate>
</layoutToolkit:Accordion>
http://www.silverlightshow.net/tips/How-to-add-scrollbars-to-ItemsControl.aspx suggests that I should surround my wrappanel with a scrollviewer, like this
<ItemsControl.Template>
<ControlTemplate>
<scrollviewer>
<controlsToolkit:WrapPanel />
</scrollviewer>
</ControlTemplate>
</ItemsControl.Template>
But then my wrappanel gets really small and I can only see a small vertical scrollbar
Any ideas?
Thanks a lot.
Edit: I figured thatthe wrappanel loses its width when used in the controltemplate
It should be used as follows:
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<controlsToolkit:WrapPanel ScrollViewer.VerticalScrollBarVisibility="Visible" />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
Anyway, I tried adding the ScrollViewer.VerticalScrollBarVisibility="Visible" line but I'm stuck again.
Edited again:
Now my wrappanel looks like this:
<ItemsControl ItemsSource="{Binding StageVideos}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<controlsToolkit:WrapPanel />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Image Margin="2" Width="150" Cursor="Hand" MouseLeftButtonDown="videoPreview_MouseLeftButtonDown" Tag="{Binding}" Source="{Binding PreviewImage, Converter={StaticResource ImageConverter}}" />
</DataTemplate>
</ItemsControl.ItemTemplate>
<ItemsControl.Template>
<ControlTemplate>
<ScrollViewer VerticalScrollBarVisibility="Visible">
<ItemsPresenter />
</ScrollViewer>
</ControlTemplate>
</ItemsControl.Template>
</ItemsControl>
I'm using a wrappanel as the items panel, and I'm using the ControlTemplate to surround the presenter with a scrollviewer. Still, no luck :/
It's working perfectly. i had two different Accordions on the same page, and I was checking my code changes in the one whose code I wasn't touching.
Sometimes you need to pause, go for a walk and then look at the whole screen.
The right code is the last one:
<ItemsControl ItemsSource="{Binding StageVideos}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<controlsToolkit:WrapPanel />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate>
<Image Margin="2" Width="150" Cursor="Hand" MouseLeftButtonDown="videoPreview_MouseLeftButtonDown" Tag="{Binding}" Source="{Binding PreviewImage, Converter={StaticResource ImageConverter}}" />
</DataTemplate>
</ItemsControl.ItemTemplate>
<ItemsControl.Template>
<ControlTemplate>
<ScrollViewer VerticalScrollBarVisibility="Visible">
<ItemsPresenter />
</ScrollViewer>
</ControlTemplate>
</ItemsControl.Template>
</ItemsControl>