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Nick Heiner
Nick Heiner

Reputation: 122600

Silverlight: Make ListBox big enough to fit all content?

I have a ListBox with enough items that it makes a vertical scrollbar visible. How can I make the list box automatically grow in height so it can display all items at once, without scrolling?

Thanks.

Upvotes: 1

Views: 236

Answers (2)

AnthonyWJones
AnthonyWJones

Reputation: 189535

The problem is that at the core of the ListBox template is this Xaml:-

<Border CornerRadius="2" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}">
    <ScrollViewer x:Name="ScrollViewer" Padding="{TemplateBinding Padding}" Background="{TemplateBinding Background}" BorderBrush="Transparent" BorderThickness="0" TabNavigation="{TemplateBinding TabNavigation}">
        <ItemsPresenter />
    </ScrollViewer>
</Border>

The ScrollViewer makes what you want to do quite difficult. The solution is to (assuming you really need a ListBox specifically) is to re-template the ListBox. Adjust the above portion of the template to:-

<Border CornerRadius="2" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}">
    <ItemsPresenter />
</Border>

You would probably want to use StackPanel as the items panel as well.

However if you don't need the selection features of ListBox then a simple ItemsControl would do it.

Upvotes: 4

Stephan
Stephan

Reputation: 5488

You have to make sure it's container will give it enough space. If the container for the ListBox is a Grid with fixed width and height then it will give the ListBox a fixed size. When the height of the items exceeds that size then the scroll bar will become visible. If you put the ListBox in a StackPanel the StackPanel will give the ListBox infinite size. You still have to make sure the size of the StackPanel is unbounded though.

Upvotes: 0

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