scrollviewer

问题 In xaml code <StackPanel> <ScrollViewer> <local:CustomCanvas> </local:CustomCanvas> </ScrollViewer> </StackPanel> CustomCanvs has a zoom in/out function. But when I spin the mouse wheel in the CustomCanvas area, ScrollViewer's scrollbar works and zoom in/out don't work. And when I scroll the scrollbar of the ScrollViewer, not only CustomCanvas' zoom in/out work but also scrolling of the ScrollViewer work well. When I spin the mouse wheel, I want only zoom in/out. And when I scroll the

问题 In xaml code <StackPanel> <ScrollViewer> <local:CustomCanvas> </local:CustomCanvas> </ScrollViewer> </StackPanel> CustomCanvs has a zoom in/out function. But when I spin the mouse wheel in the CustomCanvas area, ScrollViewer's scrollbar works and zoom in/out don't work. And when I scroll the scrollbar of the ScrollViewer, not only CustomCanvas' zoom in/out work but also scrolling of the ScrollViewer work well. When I spin the mouse wheel, I want only zoom in/out. And when I scroll the

问题 I have a TreeView. Now, I want to detect, if the vertical Scrollbar is visible or not. When I try it with var visibility = this.ProjectTree.GetValue(ScrollViewer.VerticalScrollBarVisibilityProperty) (where this.ProjectTree is the TreeView) I get always Auto for visibility. How can I do this to detect, if the ScrollBar is effectiv visible or not? Thanks. 回答1: You can use the ComputedVerticalScrollBarVisibility property. But for that, you first need to find the ScrollViewer in the TreeView 's

问题 This is what my control tree looks like: <window> <scrollviewer> <expander> <scrollviewer> <grid> </grid> </scrollviewer> </expander> <expander> <scrollviewer> <grid> </grid> </scrollviewer> </expander> </scrollviewer> </window> Using the mouse wheel, the control automatically passes from parent to child scrollviewer, but when I scroll to the end of the child scrollviewer the control doesn't pass back to the parent scorllviewer. How do I achieve this? The expander, grid and the scrollviewers

问题 I need to get a specific ScrollViewer control from an XAML file in C#, so that I can try to implement a drag-and-scroll system where when an item is dragged near the edge it will scroll accordingly. But I need access to all the methods to do this, yet I cannot find any info as to how to get the specific scrollviewer from the XAML. I need access to it from a separate .cs file in which most of the project's converters and functions are located. Not sure bout the downvotes tho seeing as I did

问题 I have a documentviewer which i used in my wpf project to show xps document reports of having around 600 pages which is working great. But from user point of view i like to show the current page number as a tooltip on my scrollviewer while dragging the scroll stating the current page number in view. Somewhat like in a PDF file like this - I was looking out for some ideas how to implement this. Just a current page number if not possible to show a thumbnail image would be good enough for me. Is

问题 I want to show the tooltip on my scrollviewer on page scrolling which shows the current page number in it which i asked here- Tooltip on scrollviewer in documentviewer. I have implemented the answer after making some changes in the proposed solution but i face some problem. If i write this in my scroll_changed event if (Mouse.LeftButton == MouseButtonState.Pressed) it works perfectly fine but if i have a deferred scrolling enabled on my custom document viewer, the popup(tooltip) never appears

问题 In my project, I use ScrollViewer to show some long height infomation. I use like this: <Grid Grid.Row="1" Height="630"> <ScrollViewer Background="Red" Grid.Row="1"> <Grid> <Rectangle Height="3000" Fill="LightBlue" Width="440"/> </Grid> </ScrollViewer> </Grid> But,unfortunately, the rectagnle don't show completely when scrollView bar's vertical height > 2000. I have tested without Grid as ScrollViewer's content, only with Rectangle, the result is the same. And the bug is also happens with

问题 I have a ScrollViewer instance in my custom control... I need the requirement that whether scorollview is scrolled to the End? Is there any way? 回答1: You can check this with this way: ... scrollViewer.ScrollChanged += OnScrollChanged; ... private void OnScrollChanged(object sender, ScrollChangedEventArgs e) { var scrollViewer = (ScrollViewer)sender; if (scrollViewer.VerticalOffset == scrollViewer.ScrollableHeight) MessageBox.Show("This is the end"); } 回答2: Here is my MVVM-friendly version:

问题 I have a ScrollViewer instance in my custom control... I need the requirement that whether scorollview is scrolled to the End? Is there any way? 回答1: You can check this with this way: ... scrollViewer.ScrollChanged += OnScrollChanged; ... private void OnScrollChanged(object sender, ScrollChangedEventArgs e) { var scrollViewer = (ScrollViewer)sender; if (scrollViewer.VerticalOffset == scrollViewer.ScrollableHeight) MessageBox.Show("This is the end"); } 回答2: Here is my MVVM-friendly version: