How can I get a vertical scrollbar in my ListBox

Question

In the example below I have a ListBox with dozens of font names in it   I would have thought it would automatically have a vertical scrollbar on it so that you can select ANY font  not just the first ones in the list  but it doesn t   So I added a  ScrollViewer  and that puts a  scrollbar area  on the right but there is no scrollbar in the scrollbar area so that you can scroll       Why isn t a scrollbar automatic and how do I force it to have a scrollbar    lt StackPanel Name  stack1  gt       lt Grid gt           lt Grid RowDefinitions gt               lt RowDefinition Height  2   gt  lt  RowDefinition gt               lt RowDefinition Height     gt  lt  RowDefinition gt           lt  Grid RowDefinitions gt           lt ScrollViewer gt               lt ListBox Grid Row  0  Name  lstFonts  Margin  3   ItemsSource   x Static Fonts SystemFontFamilies    gt           lt  ScrollViewer gt       lt  Grid gt   lt  StackPanel gt

User · Accepted Answer

The problem with your solution is you re putting a scrollbar around a ListBox where you probably want to put it inside the ListBox     If you want to force a scrollbar in your ListBox  use the ScrollBar VerticalScrollBarVisibility attached property    lt ListBox      ItemsSource   Binding        ScrollViewer VerticalScrollBarVisibility  Visible  gt   lt  ListBox gt    Setting this value to Auto will popup the scrollbar on an as needed basis

User · Answer

In my case the number of items in the ListBox is dynamic so I didn t want to use the Height property  I used MaxHeight instead and it works nicely  The scrollbar appears when it fills the space I ve allocated for it

User · Answer

I was having the same problem  I had a ComboBox followed by a ListBox in a StackPanel and the scroll bar for the ListBox was not showing up  I solved this by putting the two in a DockPanel instead  I set the ComboBox DockPanel Dock  Top  and let the ListBox fill the remaining space

User · Answer

I added a  Height  to my ListBox and it added the scrollbar nicely

User · Answer

Scroll Bar is added to the List box automatically unless its visibility is set to Hidden  Whenever the size of List Items exceeds the one  which can be shown inside a list box vertical or horizontal list box can be seen during the run time

User · Answer

I added a  Height  to my ListBox and it added the scrollbar nicely

User · Answer

ListBox already contains ScrollViewer  By default the ScrollBar will show up when there is more content than space  But some containers resize themselves to accommodate their contents  e g  StackPanel   so there is never  more content than space   In such cases  the ListBox is always given as much space as is needed for the content   In order to calculate the condition of having more content than space  the size should be known  Make sure your ListBox has a constrained size  either by setting the size explicitly on the ListBox element itself  or from the host panel   In case the host panel is vertical StackPanel and you want VerticalScrollBar you must set the Height on ListBox itself  For other types of containers  e g  Grid  the ListBox can be constrained by the container  For example  you can change your original code to look like this    lt Grid Name  grid1  gt       lt Grid gt           lt Grid RowDefinitions gt               lt RowDefinition Height  2   gt  lt  RowDefinition gt               lt RowDefinition Height     gt  lt  RowDefinition gt           lt  Grid RowDefinitions gt           lt ListBox Grid Row  0  Name  lstFonts  Margin  3                   ItemsSource   x Static Fonts SystemFontFamilies    gt       lt  Grid gt   lt  Grid gt    Note that it is not just the immediate container that is important  In your example  the immediate container is a Grid  but because that Grid is contained by a StackPanel  the outer StackPanel is expanded to accommodate its immediate child Grid  such that that child can expand to accommodate its child  the ListBox    If you constrain the height at any point  mdash  by setting the height of the ListBox  by setting the height of the inner Grid  or simply by making the outer container a Grid  mdash  then a vertical scroll bar will appear automatically any time there are too many list items to fit in the control

User · Answer

I added a  Height  to my ListBox and it added the scrollbar nicely

User · Answer

XAML ListBox Scroller - Windows 10 UWP    lt Style TargetType  ListBox  gt       lt Setter Property  ScrollViewer HorizontalScrollBarVisibility  Value  Visible   gt       lt Setter Property  ScrollViewer VerticalScrollBarVisibility  Value  Visible   gt   lt  Style gt

User · Answer

XAML ListBox Scroller - Windows 10 UWP    lt Style TargetType  ListBox  gt       lt Setter Property  ScrollViewer HorizontalScrollBarVisibility  Value  Visible   gt       lt Setter Property  ScrollViewer VerticalScrollBarVisibility  Value  Visible   gt   lt  Style gt

User · Answer

I was having the same problem  I had a ComboBox followed by a ListBox in a StackPanel and the scroll bar for the ListBox was not showing up  I solved this by putting the two in a DockPanel instead  I set the ComboBox DockPanel Dock  Top  and let the ListBox fill the remaining space

User · Answer

Scroll Bar is added to the List box automatically unless its visibility is set to Hidden  Whenever the size of List Items exceeds the one  which can be shown inside a list box vertical or horizontal list box can be seen during the run time

User · Answer

In my case the number of items in the ListBox is dynamic so I didn t want to use the Height property  I used MaxHeight instead and it works nicely  The scrollbar appears when it fills the space I ve allocated for it

User · Answer

ListBox already contains ScrollViewer  By default the ScrollBar will show up when there is more content than space  But some containers resize themselves to accommodate their contents  e g  StackPanel   so there is never  more content than space   In such cases  the ListBox is always given as much space as is needed for the content   In order to calculate the condition of having more content than space  the size should be known  Make sure your ListBox has a constrained size  either by setting the size explicitly on the ListBox element itself  or from the host panel   In case the host panel is vertical StackPanel and you want VerticalScrollBar you must set the Height on ListBox itself  For other types of containers  e g  Grid  the ListBox can be constrained by the container  For example  you can change your original code to look like this    lt Grid Name  grid1  gt       lt Grid gt           lt Grid RowDefinitions gt               lt RowDefinition Height  2   gt  lt  RowDefinition gt               lt RowDefinition Height     gt  lt  RowDefinition gt           lt  Grid RowDefinitions gt           lt ListBox Grid Row  0  Name  lstFonts  Margin  3                   ItemsSource   x Static Fonts SystemFontFamilies    gt       lt  Grid gt   lt  Grid gt    Note that it is not just the immediate container that is important  In your example  the immediate container is a Grid  but because that Grid is contained by a StackPanel  the outer StackPanel is expanded to accommodate its immediate child Grid  such that that child can expand to accommodate its child  the ListBox    If you constrain the height at any point  mdash  by setting the height of the ListBox  by setting the height of the inner Grid  or simply by making the outer container a Grid  mdash  then a vertical scroll bar will appear automatically any time there are too many list items to fit in the control

User · Answer

I added a  Height  to my ListBox and it added the scrollbar nicely

[wpf] How can I get a vertical scrollbar in my ListBox?

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