<UserControl x:Class="JIMS.View.Settings.Settings"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Name="SettingsWindow">
<Border Style="{StaticResource WindowBorderStyle}" Height="100">
<StackPanel Orientation="Vertical">
<my:TitleBar Title="settings"/>
<StackPanel Orientation="Horizontal">
<StackPanel Orientation="Horizontal">
<StackPanel Orientation="Vertical" Margin="10,0,0,0">
<Label>Theme :</Label>
</StackPanel>
<StackPanel Orientation="Vertical" Width="200" Margin="0,0,10,0">
<ComboBox Name="cmbTheme" ItemsSource="{Binding Path=Themes}" ></ComboBox>
</StackPanel>
</StackPanel>
</StackPanel>
</StackPanel>
</Border>
</UserControl>
这是我的UserControl,我没有设置其宽度和高度属性.
但在一些代码隐藏中,我想得到这个UserControl的高度和宽度,我无法得到它们.
double width=uctrl.Width;
它给了我NaN
double width=ctrl.ActualWidth;
给我0
我需要宽度和高度的代码
private void OpenChild(UserControl ctrl)
{
bool alreadyExist = false;
ctrl.Uid = ctrl.Name;
foreach (UIElement child in JIMSCanvas.Children)
{
if (child.Uid == ctrl.Uid)
{
alreadyExist = true;
Canvas.SetZIndex(child, GetMaxZIndex);
}
}
if (!alreadyExist)
{
JIMSCanvas.Children.Add(ctrl);
JIMSCanvas.InvalidateMeasure();
double top = (JIMSCanvas.ActualHeight - ctrl.Height) / 2;
double left = (JIMSCanvas.ActualWidth - ctrl.Width) / 2;
Canvas.SetLeft(ctrl, left);
Canvas.SetTop(ctrl, top);
}
}
最佳答案 在一个全新的项目中我写了这个(它在更改窗口时给了我更新的宽度):
<Window xmlns:my="clr-namespace:WpfApplication2"
x:Class="WpfApplication2.Window32"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Window32"
Height="300"
Width="300">
<Grid>
<my:UserControl3 x:Name="uc3" />
<TextBlock Height="23"
HorizontalAlignment="Left"
Margin="126,121,0,0"
Name="textBlock1"
Text="{Binding ElementName=uc3, Path=ActualWidth}"
VerticalAlignment="Top" />
</Grid>
</Window>