如何绑定到一个自定义的中的另一个控制控制按钮能见度 [英] How to Bind to a Custom Controls Button Visibility from Within Another Control

问题描述

我有一个自定义的控制，它有一个按钮：

I have a custom control, which has a button:

<UserControl x:Class="Gambit.Views.FileSelectionControl"
    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" 
    SnapsToDevicePixels="True" 
    mc:Ignorable="d">
    ...
    <Button Content="Load" 
            Margin="5,5,5,5" 
            Height="22" 
            Width="70" 
            IsDefault="True" 
            IsEnabled="{Binding SelectedFileExists}" 
            AttachedCommand:CommandBehavior.Event="Click" 
            AttachedCommand:CommandBehavior.Command="{Binding CloseDialogCommand}"/>
    ...
</UserControl>

我想包括这种控制，在另一个控制，但我想设置加载在主机控制设计时按钮的知名度;像

I want to include this control, in another control, but I want to set the Load buttons visibility at design time in the host control; something like

<UserControl x:Class="Gambit.Views.SomeOtherControl"
    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" 
    SnapsToDevicePixels="True" 
    mc:Ignorable="d">
    ...
    <GroupBox Header="Select Test Data">
        <Views:FileSelectionControl <Here Set the Load Button Visibility>/>
    </GroupBox>
    ...
</UserControl>

其中，<在这里设置Load按钮能见度和GT; 显示，我想设置控制的可见性。这是怎么做[没有打破MVVM模式]

where <Here Set the Load Button Visibility> shows where i want to set the visibility of the control. How is this done [without breaking the MVVM pattern]?

感谢您的时间。

推荐答案

您可以创建的DependencyProperty 在用户控件：

public partial class SomeView : UserControl
{
    ...

    public static DependencyProperty ButtonVisibilityProperty = DependencyProperty.Register("ButtonVisibility", typeof(Visibility), typeof(SomeView));

    public Visibility ButtonVisibility
    {
        get { return (Visibility)GetValue(ButtonVisibilityProperty); }
        set { SetValue(ButtonVisibilityProperty, value); }
    }
}

将其绑定到按钮.Visibility ：

<UserControl x:Class="WpfApplication2.SomeView"
             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">
    <Button Visibility="{Binding RelativeSource={RelativeSource AncestorType={x:Type UserControl}}, Path=ButtonVisibility}" Content="My Button"/>
</UserControl>

然后就可以控制能见度从外部像这样：

<local:SomeView ButtonVisibility="Collapsed"/>

和因为它是一个的DependencyProperty 您可以使用绑定以及

and because it's a DependencyProperty you can use Binding as well

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