如何从主窗口隐藏用户控件中的按钮？

您无需在Window_Loaded此处使用事件。

您需要Visibility为中的每个按钮公开一个属性UserControls。

在您UserControl为Visibility属性的每个按钮添加一个绑定：

Visibility="{Binding AddButtonVisibility}"
Visibility="{Binding ShowHistoryButtonVisibility}"
Visibility="{Binding ShowCustomerButtonVisibility}"

请确保您添加DataContext到您的UserControl，我一般都用自我：

DataContext="{Binding RelativeSource={RelativeSource Self}}"

在UserControl后面的代码中，为上面的每个绑定添加依赖项属性：

    public Visibility AddButtonVisibility
    {
        get { return (Visibility)GetValue(AddButtonVisibilityProperty); }
        set { SetValue(AddButtonVisibilityProperty, value); }
    }

    // Using a DependencyProperty as the backing store for AddButtonVisibility.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty AddButtonVisibilityProperty =
        DependencyProperty.Register("AddButtonVisibility", typeof(Visibility), typeof(UserControl1), new PropertyMetadata(Visibility.Visible));


    public Visibility ShowHistoryButtonVisibility
    {
        get { return (Visibility)GetValue(ShowHistoryButtonVisibilityProperty); }
        set { SetValue(ShowHistoryButtonVisibilityProperty, value); }
    }

    // Using a DependencyProperty as the backing store for ShowHistoryButtonVisibility.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty ShowHistoryButtonVisibilityProperty =
        DependencyProperty.Register("ShowHistoryButtonVisibility", typeof(Visibility), typeof(UserControl1), new PropertyMetadata(Visibility.Visible));



    public Visibility ShowCustomerButtonVisibility
    {
        get { return (Visibility)GetValue(ShowCustomerButtonVisibilityProperty); }
        set { SetValue(ShowCustomerButtonVisibilityProperty, value); }
    }

    // Using a DependencyProperty as the backing store for ShowCustomerButtonVisibility.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty ShowCustomerButtonVisibilityProperty =
        DependencyProperty.Register("ShowCustomerButtonVisibility", typeof(Visibility), typeof(UserControl1), new PropertyMetadata(Visibility.Visible));

在Visual Studio中，“依赖项属性”有一个代码片段快捷方式-键入propdp并单击tab两次。

现在，要使用刚刚创建的属性，请将Usercontrol放到相关窗口中：

<local:UserControl1 AddButtonVisibility="Collapsed" />

local是项目名称空间的别名-在您的顶部定义Window。您只需将拖放UserControl到窗口上，它将为您完成此操作。（您可能需要重新构建才能UserControls在工具箱中看到您的内容。

现在，您应该可以看到已Add Button折叠的控件。

为了完整起见，这是XAML事情的一面：

UserControl Xaml：

<UserControl x:Class="WpfApplication2.UserControl1"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
         mc:Ignorable="d" 
         d:DesignHeight="300" d:DesignWidth="300"
         DataContext="{Binding RelativeSource={RelativeSource Self}}">
<Grid x:Name="girdBtuWidow" >
    <StackPanel Orientation="Horizontal">
        <Button Content="Add" x:Name="add" Height="50"  Width="100" Margin="0" Click="Add_Click" Visibility="{Binding AddButtonVisibility}"/>
        <Button Content="Show History" x:Name="Personal" Height="50"  Width="100" Margin="0" Click="ShowHistory_Click" Visibility="{Binding ShowHistoryButtonVisibility}" />
        <Button Content="Show Customer" x:Name="Customer" Height="50"  Width="100" Margin="0" Click="ShowCustomer_Click" Visibility="{Binding ShowCustomerButtonVisibility}"/>
    </StackPanel>
</Grid>

Window1.Xaml：

<Window
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WpfApplication2" x:Class="WpfApplication2.Window1"
    Title="Window1" Height="300" Width="308">
<Grid>
    <local:UserControl1 HorizontalAlignment="Left" VerticalAlignment="Top" AddButtonVisibility="Collapsed" />
</Grid>