C# 如何知道系统滚动条的当前宽度？
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How do I know the current width of system scrollbar?
提问by Hao Wooi Lim
As you know, one can customize the width of the scrollbar width in Display Properties -> Appearance -> Advanced -> Item: ScrollBar. The default value is 17. However, I can't assume this is always the case, is it possible for me to retrieve this value?
众所周知，可以在Display Properties -> Appearance -> Advanced -> Item: ScrollBar 中自定义滚动条的宽度。默认值为 17。但是，我不能假设情况总是如此，我是否可以检索此值？
采纳答案by leppie
Look at the System.Windows.Forms.SystemInformationclass members: HorizontalScrollBarHeightand VerticalScrollBarWidth.
看看System.Windows.Forms.SystemInformation班级成员：HorizontalScrollBarHeight和VerticalScrollBarWidth。
回答by leppie
Vertical Scroll Bar Width
垂直滚动条宽度
System.Windows.Forms.SystemInformation.VerticalScrollBarWidth;
回答by Paolo M
If you want to know the size of a ScrollableControlminus the size of the scroll bar, the easiest way is to use the Control.ClientSizeproperty.
如果你想知道 aScrollableControl的大小减去滚动条的大小，最简单的方法是使用该Control.ClientSize属性。
From the documentation:
从文档：
Gets or sets the height and width of the client area of the control. The client area of a control is the bounds of the control, minus the nonclient elements such as scroll bars, borders, title bars, and menus.
获取或设置控件工作区的高度和宽度。控件的客户区是控件的边界，减去非客户元素，如滚动条、边框、标题栏和菜单。
回答by user3892767
Skip the ClientSize property of the control. At least in VS2013 the Scrollbar is included in the ClientSize.
跳过控件的 ClientSize 属性。至少在 VS2013 中，滚动条包含在 ClientSize 中。
When I formatted a RichTextBox with a width of 304 and a vertical scrollbar, the Client Size width was 300, which only accounted for the borders.
当我格式化一个宽度为304，垂直滚动条的RichTextBox时，Client Size宽度为300，只占了边框。
stick with the System.Windows.Forms.SystemInformation.VerticalScrollBarWidth to get your scrollbar width.
坚持使用 System.Windows.Forms.SystemInformation.VerticalScrollBarWidth 来获取滚动条宽度。
