如何获取在运行时更改的 WPF 面板的大小？
我有一个 Panel，其 Width 可以在运行时调整大小：
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="770*"/>
</Grid.ColumnDefinitions>
<panels:NavigationPanel x:Name="cmBar" Margin="2,2,0,2"
HorizontalAlignment="Left" Width="220"/>
<panels:DetailAreaPanel x:Name="detailGrid" Margin="224,2,2,2" />
</Grid>
当程序关闭时，我想将新的 Width 保存在注册表中。因此，程序下次打开时将加载到相同的大小。除了 Width 之外，我的所有功能都正常，除非我对新的 Width 进行硬编码。所以我会假设我的保存是错误的。
all[5] = cmBar.ActualWidth.ToString();
然后 all[] 被写入注册表。无论面板大小如何调整 cmBar.ActualWidth 始终为 220。有什么想法吗？
I have a Panel whose Width can be resized during runtime:
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="770*"/>
</Grid.ColumnDefinitions>
<panels:NavigationPanel x:Name="cmBar" Margin="2,2,0,2"
HorizontalAlignment="Left" Width="220"/>
<panels:DetailAreaPanel x:Name="detailGrid" Margin="224,2,2,2" />
</Grid>
When the program is closed, I want to save the new Width in the registry. So the program will load to the same size next time its opened. I have everything working except the Width, unless I hardcode the new Width. So I would assume that my save is wrong.
all[5] = cmBar.ActualWidth.ToString();
all[] is then wrote into the registry. No matter how the panel is resized cmBar.ActualWidth is always 220. Any ideas?
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HorizontalAlignment="Stretch" 将允许控件调整其父级的大小。 “左”仅调整其自身大小，并在其右侧留下空白空间。
HorizontalAlignment="Stretch" will allow the control to size to its parent. "Left" just sizes to itself and leaves empty space to its right.
Aviad P. 有一个正确的
.Width是导致问题的原因。解决方案是当我加载宽度时将其加载为.MaxWidth这将调整大小，但允许.ActualWidth具有面板的真实宽度。Aviad P. had one this right the
.Widthis what is causing the problem. The solution is is when i load the width to load it as.MaxWidthThis will do the resizing but allow.ActualWidthto have the real width of the panel.Width="220"的小片段将宽度设置为 220，除非从代码隐藏中显式更改，否则它不会改变。您是否在代码隐藏中更改面板的宽度？如果不是 - 那么它的宽度实际上不会改变，并且在其整个生命周期中保持在 220。The little piece that says
Width="220"sets the width to 220, and that will not change unless explicitly changed from the code-behind. Are you changing the panel's width in code-behind? If not - then its width really doesn't change, and stays at 220 throughout its lifetime.