How to find Vertical Scrollbar width of a Scrollviewer in C#

Question

I have a ScrollViewer and in that I am showing the Vertical Scrollbar, Now on changing resolution of the system I want to get the width of the scrollbar. I went through One StackOverflow Post there they mention to check for SystemParameters.ScrollWidth Property but again I din find any help from their. Can anybody please help me to fix my issue. Any answer will be appreciated.

Check for this code, This will give you the default Scrollbar width: double scrollBarwidth=SystemParameters.VerticalScrollBarWidth; By the way why you are looking for it, any how the default vale of the VerticalScrollBarWidth is 17 I think. — SharpUrBrain, Apr 18 '11 at 14:20
@SharpUrBrain: Yeah I checked, it is giving me 17 pixel but I was thinking whether its changing according to DPI settings so that's why I was looking for it. — , Apr 19 '11 at 04:03

score 49 · Accepted Answer · answered Apr 18 '11 at 10:52

49

I think SystemParameters.VerticalScrollBarWidth is what you are looking for.

answered Apr 18 '11 at 10:52

Fredrik Mörk

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If you need to express it in XAML, you can do it like this: – Darren Jul 15 '14 at 08:36
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I got a cast exception because the value is a double, but ColumnDefinition is a GridLength. The solution I used: – Melvyn Oct 12 '16 at 08:20

score 12 · Answer 2 · answered Jul 07 '14 at 17:05

12

I am not sure if this is the correct answer. Every WPF control can be restyled so even the scrollbar. So SystemParameters.VerticalScrollBarWidth works only if it is used as default scrollbar. The correct solution would be to find the vertical scrollbar in the visual tree and measure it's ActualWidth. It is the most precise measurement.

answered Jul 07 '14 at 17:05

Patrik

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How would you go about doing that in XAML? – Grubsnik Oct 03 '14 at 07:49
@Grubsnik maybe by binding to a property that you'll create ... nothing straight forwards pops to mind – Noctis Nov 03 '15 at 03:59
@Grubsnik If youcan provide the XAML I can try to write it. It is a custom solution so it is hard to give you and immediate answer. – Patrik Nov 03 '15 at 11:10
@Patrik thanks for the offer, but the XAML code and project is long gone from my mind at this point. Can't even remember the exact problem I was trying to solve. – Grubsnik Nov 12 '15 at 10:53
Exactly this.... I wanted to offset another uielement by the scrollbar width if the visibility changed. To do this I created a couple converters, one that converts a double to thickness with a mask (top,right etc) and a second that derives from this, taking a scrollviewer and passing in the scrollbar width. – Billy Jake O'Connor Mar 03 '19 at 16:55

How to find Vertical Scrollbar width of a Scrollviewer in C#

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