如何按类型获取WPF容器的子代?
我怎样才能类型的子控件ComboBox
中MyContainer
Grid
的WPF?
<Grid x:Name="MyContainer"> <Label Content="Name" Name="label1" />
<Label Content="State" Name="label2" />
<ComboBox Height="23" HorizontalAlignment="Left" Name="comboBox1"/>
<ComboBox Height="23" HorizontalAlignment="Left" Name="comboBox3" />
<ComboBox Height="23" HorizontalAlignment="Left" Name="comboBox4" />
</Grid>
这行给我一个错误:
var myCombobox = this.MyContainer.Children.GetType(ComboBox);
回答:
此扩展方法将递归搜索所需类型的子元素:
public static T GetChildOfType<T>(this DependencyObject depObj) where T : DependencyObject
{
if (depObj == null) return null;
for (int i = 0; i < VisualTreeHelper.GetChildrenCount(depObj); i++)
{
var child = VisualTreeHelper.GetChild(depObj, i);
var result = (child as T) ?? GetChildOfType<T>(child);
if (result != null) return result;
}
return null;
}
因此,您可以要求使用MyContainer.GetChildOfType<ComboBox>()
。
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