I have a Silverlight application that has a ListBox of a specific width. I am dynamically adding items to this ListBox in my code-behind. If the items require more space than is allotted, I would like the items to wrap to the next line AND the height of the ListBox to increase. As it runs now, a horizontal scroll bar appears in my ListBox. In addition, no wrapping, thus no growing happens. What am I doing wrong? Here is my ListBox:
<ListBox x:Name="myListBox" Grid.Column="1" Width="600" MinHeight="24">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<controlsToolkit:WrapPanel />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
Thank you for your help!
Try setting ScrollViewer.HorizontalScrollBarVisibility to Disabled on the ListBox to prevent the horizontal scrolling and force the wraping.
<ListBox x:Name="myListBox" ScrollViewer.HorizontalScrollBarVisibility="Disabled" Grid.Column="1" Width="600" MinHeight="24">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<controlsToolkit:WrapPanel />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
Related
I have the problem, that the vertical scroll bar doesn't appear after application start.
I fill the ListPrinterButton in code behind and set the propertyChanged event. All button are visible in the ItemsControl but the vertical scroll bar only appears, after I resize this area by moving the gridsplitter.
Is there any option to "refresh" the ScrollViewer? I even tried to set VerticalScrollBarVisibility to Visible, but then, the scroll bar is visible, but not editable. Only moving the grid splitter or resizing the form will appear the right opportunity to scroll.
Can you please help?
<ScrollViewer Grid.Row="0" x:Name="svDeviceButton" VerticalScrollBarVisibility="Auto" PanningMode="Both" Background="Transparent">
<Grid>
<ItemsControl ItemsSource="{Binding ListPrinterButton, UpdateSourceTrigger=PropertyChanged}" x:Name="icPrinter">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel IsItemsHost="True" Orientation="Horizontal">
</WrapPanel>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</Grid>
</ScrollViewer>
<GridSplitter Grid.Row="1" Height="5" HorizontalAlignment="Stretch" x:Name="gsDeviceButton"/>
Thanks a lot in advance!
I want to show in WrapPanel a list of images. How can I do that or maybe I shall use other control ?
You can absolutely use the WrapPanel to show a list of images, scrolling vertically or horizontally. To get the kind of panoramic tile effect like in People hub with your images, you could do something like this:
<controls:PanoramaItem Header="something" Orientation="Horizontal" Margin="0,-15,0,0" >
<ListBox Name="SomeList" Margin="0,0,-12,0" ItemsSource="{Binding SomeItemsList}" >
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<toolkit:WrapPanel x:Name="wrapPanel" Width="700" />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" Margin="0,0,0,17">
<Image Height="200" Width="200" Margin="12,0,9,0" Source="{Binding ImageURL}" />
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
</controls:PanoramaItem>
Please note that a WrapPanel inside a ListBox does pick up the DataTemplate you define .. so you have complete liberty to bind any list to your WrapPanel.
Hope this helps!
Search for the same thing and came across this: Displaying a Collection of Items in a WrapPanel.
<ItemsControl ItemsSource="{Binding ActorList}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Image Source="{Binding Image}" Height="100"/>
</DataTemplate>
</ItemsControl.ItemTemplate>
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
or you can use Xceed's SwitchPanel.
Yes definetly not the WrapPanel, it has not ItemsSource, it can't take a list.
Use the ListBox, and you can set the ItemsSource.
Edit
I have WrapPanel where I want the control inside of it to go horizontally and centered, but when I have a listbox or a ItemsControl those elements just go downwards.
<toolkit:WrapPanel>
<ItemsControl x:Name="AnswerListBox" ItemsSource="{Binding Answers}" ScrollViewer.VerticalScrollBarVisibility="Disabled" >
<ItemsControl.ItemTemplate>
<DataTemplate>
<!-- those don't wrap horizontally and go downwards -->
<local:spriteToggleButton Text="{Binding text}" Selected="{Binding selected}" Sprites="{Binding Path=DataContext.UISprites, ElementName=questionField}" IsChecked="{Binding selected, Mode=TwoWay}" GroupName="{Binding Path=DataContext.QuestionTitle, ElementName=questionField}" ClickMode="Press" />
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</toolkit:WrapPanel>
I came across some similar issues and found out about ItemsPanel, so I tried that but it wrap but only to Content and didn't display the rest of the control inside of it.
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<toolkit:WrapPanel />
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
I take it that ItemsPanel is telling the ItemsControl which control to wrap it with but then it seems to ignore the rest of my datatemplate.
Joseph,
Slightly shooting in the dark here; but this is how I have used the WrapPanel (not through the ItemControl).
<ListBox>
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<toolkit:WrapPanel Width="700" />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBox.ItemTemplate>
<DataTemplate>
....
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
Essentially the Listbox's ItemsPanel tells it to use the WrapPanel and then you could have anything you need in the DataTemplate. Note that the width is important as it tells the WrapPanel where to start wrapping.
Does this help?
I have a wrap panel displaying items but I cant get a scroll bar to work properly any idea's whats wrong ?
<ScrollViewer>
<ItemsControl Name="itemsControl">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel ItemWidth="{Binding ElementName=sizeSlider, Path=Value}"
FlowDirection="LeftToRight" Height="auto" Width="auto"
HorizontalAlignment="Left" Name="wrapPanel1"
VerticalAlignment="Top"
Margin="5"
>
</WrapPanel>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</ScrollViewer>
</StackPanel>
Your ScrollViewer is inside StackPanel which resizes to its content (either vertically or horizontally depending on its orientation). Place it either directly in a Window, a cell of a Grid, or a DockPanel for scroll bars to show up.
I have a UserControl (XAML below) that has a ListBox that I want to display images inside a WrapPanel, where images are displayed as many as will fit on one row and then wrap onto the next row etc. It works, except when the ListBox grows higher than the available space in the window, I'm not getting a vertical scrollbar, i.e. the contents get clipped. If I set a fixed height on the ListBox, the scrollbar appears and works as expected. How can I get this listbox to grow to the available space and then show a vertical scrollbar? This control is inside StackPanel inside a Grid in the main window. If I wrap the StackPanel inside a ScrollViewer, I get the scrollbar I'm after, but that's not really a good solution if I wanted to add some more controls to the UserControl above the ListBox (e.g. image size "zoom" etc) as I wouldn't want them to scroll with the images.
Thanks!! :)
<UserControl x:Class="GalleryAdmin.UI.GalleryView"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
<ListBox Name="itemListBox" BorderThickness="0" ItemsSource="{Binding}" ScrollViewer.HorizontalScrollBarVisibility="Disabled">
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Background="LightGray" Margin="5" >
<StackPanel Margin="5">
<Image Source="{Binding Path=LocalThumbPath}" Height="100" />
<TextBlock Text="{Binding Path=Name}" TextAlignment="Center"></TextBlock>
</StackPanel>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
I think you better go with override the ItemPanelTemplate:
<Grid>
<ListBox ScrollViewer.HorizontalScrollBarVisibility="Disabled">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel IsItemsHost="True" />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
<ListBoxItem>listbox item 1</ListBoxItem>
<ListBoxItem>listbox item 2</ListBoxItem>
<ListBoxItem>listbox item 3</ListBoxItem>
<ListBoxItem>listbox item 4</ListBoxItem>
<ListBoxItem>listbox item 5</ListBoxItem>
</ListBox>
Well, I finally stumbled upon the solution. I was adding my UserControl to a placeholder panel that looked like this:
<ScrollViewer Margin="20" >
<StackPanel Name="contentPanel"></StackPanel>
</ScrollViewer>
However, when I switched it to a Grid instead, things started to work the way I wanted:
<Grid Name="contentPanel" Margin="20" />
I think it has to do with the StackPanel not taking up all the vertical space by default, like the Grid is doing.
All I had to do was set the following, and the problem went away:
<ListBox ScrollViewer.HorizontalScrollBarVisibility="Disabled">
I was just looking through several questions about this issue, and although this is an old thread, this one gave me the answer, but just to clarify....
The layout GRID is the answer to most issues like this. To get the proper ListBox/WrapPanel operation to fill the available space, the following code does the trick:
<Grid Grid.Row="1" MaxHeight="105">
<ListBox ItemTemplate="{DynamicResource StoreGroupTemplate01}" ItemsSource="{Binding StoreGroupHeader}"
ScrollViewer.HorizontalScrollBarVisibility="Disabled">
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Orientation="Horizontal"/>
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
</Grid>
I have this in another grid to place the list at the bottom of my screen (ie.. the Grid.Row="1") and you can adjust MaxHeight (or remove it) to control the visible area before the vertical scroll bar will show up.
Put your listbox inside of a ScrollViewer and then set the scrollviewer's VerticalScrollBarVisibility property to "Auto"
<ScrollViewer VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Disabled">
<ListBox Name="itemListBox" BorderThickness="0" ItemsSource="{Binding}" >
<ListBox.ItemTemplate>
<DataTemplate>
<StackPanel Background="LightGray" Margin="5" >
<StackPanel Margin="5">
<Image Source="{Binding Path=LocalThumbPath}" Height="100" />
<TextBlock Text="{Binding Path=Name}" TextAlignment="Center"></TextBlock>
</StackPanel>
</StackPanel>
</DataTemplate>
</ListBox.ItemTemplate>
<ListBox.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel />
</ItemsPanelTemplate>
</ListBox.ItemsPanel>
</ListBox>
</ScrollViewer>
HTH