查找DocumentViewer的ScrollViewer的最大偏移量 [英] Find the maximum offset of DocumentViewer's ScrollViewer

问题描述

我正在DocumentViewer中显示一个xps文档.
在程序中，DocumentViewer旁边有一个树状视图列表，当您选择每个项目时，它应将xps文件导航到特定位置(就像pdf书签一样).
问题是我必须将VerticalScrollbar位置设置为特殊位置，并使其即使通过页面缩放等也唯一且稳定.

为此，我尝试通过比率(偏移=比率* maxoffset)设置位置，但是找不到maxoffset，实际上"ScrollViewer.Content.ActualHeight"与滚动条末尾的偏移不同.

我的代码是:

Hi,
I am showing a xps document in a DocumentViewer.
In the program there is a treeview list next to the DocumentViewer that when you select each item it should navigate the xps file to specifice place(just like pdf bookmark).
The problem is i have to set the VerticalScrollbar position to a special position and make it unique and stable even by page zoom and etc.

for that i tried to set the position by the ratio (offset = ratio * maxoffset) but cant find the maxoffset, actually the "ScrollViewer.Content.ActualHeight" is different from the offset at the end of the scrollbar.

my code is:

ScrollViewer dvScrollViewer = documentViewer.Template.FindName("PART_ContentHost", documentViewer) as ScrollViewer;

dvScrollViewer.ScrollToEnd();
MessageBox.Show(dvScrollViewer.VerticalOffset.ToString());
MessageBox.Show((dvScrollViewer.Content as FrameworkElement).ActualHeight.ToString());

但是第一个消息是86667.307
第二个是573.696

有帮助吗?
很长的问题和英语对不起，:D

But the firs message is 86667.307
and the second one : 573.696

any Help?
sorry for the long question and the english :D
thanks.

推荐答案

嗨.

请尝试以下操作:

dvScrollViewer.ScrollToEnd();
dvScrollViewer.UpdateLayout();
MessageBox.Show(dvScrollViewer.VerticalOffset.ToString());
MessageBox.Show((dvScrollViewer.Content as FrameworkElement).ActualHeight.ToString());

问候.

Hi.

Please try this:

dvScrollViewer.ScrollToEnd();
dvScrollViewer.UpdateLayout();
MessageBox.Show(dvScrollViewer.VerticalOffset.ToString());
MessageBox.Show((dvScrollViewer.Content as FrameworkElement).ActualHeight.ToString());

Regards.

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