ScrollViewer ScrollBar缩小！ [英] ScrollViewer ScrollBars shrink!

问题描述

大家好.

我正面临一个奇怪的问题.我实现了一个Tab控件，该控件具有一个包含Canvas的scrollviewer.

I am facing a strange problem. I have implemented a Tab Control which has a scrollviewer which contains Canvas.

问题是滚动条只是收缩(如果我单击箭头，它们仍然可以工作)，有时工作得很好.我不知道为什么.

The problem is the scroll bars just shrink (they still work if I click on the arrows) and sometimes work fine. I can't figure out why.

有人遇到这样的问题吗?

Has anyone faced such a problem?

这是发生的情况的图片.

Here is a picture of what happens.

http://imageto.net/?v=scrollbar.gif

 

这是代码:

           ScrollViewer scrollViewer = new ScrollViewer();

           ScrollViewer scrollViewer = new ScrollViewer();

             scrollViewer.CanContentScroll = true;

            scrollViewer.CanContentScroll = true;

 

            //滚动条会在需要时显示.

            //Scroll bars appear when they are needed.

             scrollViewer.Horizo​​ntalScrollBarVisibility = ScrollBarVisibility.Auto;

            scrollViewer.HorizontalScrollBarVisibility = ScrollBarVisibility.Auto;

             scrollViewer.VerticalScrollBarVisibility = ScrollBarVisibility.Auto;

            scrollViewer.VerticalScrollBarVisibility = ScrollBarVisibility.Auto;

             scrollViewer.Background = Brushes.White;

            scrollViewer.Background = Brushes.White;

             scrollViewer.ScrollChanged + =新的ScrollChangedEventHandler(scrollViewer_ScrollChanged);

            scrollViewer.ScrollChanged += new ScrollChangedEventHandler(scrollViewer_ScrollChanged);

 

            //将画布设置为滚动查看器的子级.

            //Set canvas as child of the scroll viewer.

             scrollViewer.Content = canvas;

            scrollViewer.Content = canvas;

             tabItem.Content =  scrollViewer;

            tabItem.Content = scrollViewer;

推荐答案

通常的做法是将Grid放在ScrollViewer中，而不是Canvas中.那是因为Grid会自动扩展以适合其内容，而Canvas不会.

The normal way of doing this would be putting Grid inside a ScrollViewer, not Canvas. That's because Grid expands automatically to fit it's contents but Canvas does not.

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