Question

我有主视图：

<Window ...>
        <WrapPanel Name="Container" Height="500" Width="1024" VerticalAlignment="Center">
        <WrapPanel>
            <local:RequestListView />

        </WrapPanel>
    </StackPanel>
</Window>

然后这个RequestListView是一个用户控件：

<UserControl x:Class="...RequestFormView">
    <WrapPanel Name="Teste" Margin="20" Width="1000">
        <StackPanel Name="LeftPanel" Width="500">
            <WrapPanel>
                <Label Content="Nome do Pedido"/>
                <TextBox MinWidth="200" Text="{Binding Request.descRequest}"></TextBox>
            </WrapPanel>
            <StackPanel Name="LeftContainer">

            </StackPanel>
        </StackPanel>
        <StackPanel Name="RigthPanel" Width="500">
            <Label Content="Os campos marcados com * são obrigatórios."></Label>
            <Button Width="75" Height="26" Content="Save"/>
            <Button Width="75" Height="26" Content="Cancel"/>
        </StackPanel>
        <StackPanel Name="RightContainer">

        </StackPanel>
    </WrapPanel>
</UserControl>

现在在我的RequestFormViewModel上，我想访问“LeftContainer”和“RightContainer”面板。我在尝试：

StackPanel rightPanel = (StackPanel)Application.Current.MainWindow.FindName("RightContainer");~

但是返回null。据我所见，他不能“看”控制内部。我怎样才能获得这两个面板？

Answer 1

这是可以帮助你的助手类。

<强> UIHelper.cs

public static class UIHelper
{        
    public static DependencyObject FindChild(DependencyObject parent, string name)
    {
        // confirm parent and name are valid.
        if (parent == null || string.IsNullOrEmpty(name)) return null;

        if (parent is FrameworkElement && (parent as FrameworkElement).Name == name) return parent;

        DependencyObject result = null;

        if (parent is FrameworkElement) (parent as FrameworkElement).ApplyTemplate();

        int childrenCount = VisualTreeHelper.GetChildrenCount(parent);
        for (int i = 0; i < childrenCount; i++)
        {
            var child = VisualTreeHelper.GetChild(parent, i);
            result = FindChild(child, name);
            if (result != null) break;
        }

        return result;
    }
}

像这样称呼

StackPanel foundStackPanel = (StackPanel) UIHelper.FindChild(Application.Current.MainWindow, "RightContainer");

参考： Find control in the visual tree

我希望这对你有帮助:)）

从WPF中的用户控件获取Panel

1 个答案: