CODEWITHSUNDEEP
c#.netwpflistboxscreen
Ádám Kovács
Ádám Kovács

Reputation: 107

WPF - ListBox goes out of the screen

<WrapPanel 
   HorizontalAlignment="Center" 
   ScrollViewer.VerticalScrollBarVisibility="Disabled">
   <GroupBox 
      Header="{DynamicResource ResourceKey=StampUserTab_Strings}" 
      BorderThickness="1.3" 
      Style="{StaticResource GroupBoxBorder}" >
      <ListBox 
         Grid.Row="1" 
         Name="ComponentBox" 
         ItemTemplate="{DynamicResource StringTemplate}" 
         VerticalContentAlignment="Stretch" 
         ScrollViewer.CanContentScroll="True" 
         ScrollViewer.HorizontalScrollBarVisibility="Disabled" 
         ScrollViewer.VerticalScrollBarVisibility="Auto" 
         VerticalAlignment="Stretch" 
         ItemsSource="{Binding ActiveSettings.Components}" 
         SelectionChanged="ComponentBox_SelectionChanged" 
         Style="{StaticResource ResourceKey=SettingsListBoxUser}">
         <ListBox.ItemsPanel>
            <ItemsPanelTemplate>
               <WrapPanel Orientation="Horizontal"/>
            </ItemsPanelTemplate>
         </ListBox.ItemsPanel>
      </ListBox>
   </GroupBox>
</WrapPanel>

This is my code. The main problem is, that when i add items to the listbox, it keeps expanding out of my screen. I want to make it bound to screen, so when it reaches the bottom, the vertical scroll appers and can be used to scroll the content.

I've tried to set the Height of the grid ro to *, but it didn't help.

Any ideas?

Edit: The problem was the WrapPanel. I changed it to Grid, defined rows and columns with * heights and widths. After adding my elements to the grid rows and colums the listbox were collapsed to scrolls after the expanding. Thank you for the help.

Upvotes: 0

Views: 1749

Answers (1)

Sheridan
Sheridan

Reputation: 69959

It seems as though you could do with reading through the Panels Overview page on MSDN. Different Panels have different behaviours and it's pretty important that all new WPF developers know the differences. For example, a Grid can automatically resize its content (the controls placed inside it), whereas a WrapPanel will not.

Therefore, when wishing to constrain the dimensions of your control(s), you should put them into a Grid, or one of the other Panels that provide that functionality and avoid the ones that don't.

You said:

I've tried to set the Height of the grid row to *, but it didn't help

That's because your ListBox is not in a Grid... its parent WrapPanel may be in the Grid, so you could try to set the Grid.Row on that instead.

Upvotes: 3

Related Questions