WPF UserControls - 在UserControl内的按钮上设置.Command属性 [英] WPF UserControls - setting the .Command property on button inside UserControl
问题描述
我有一个UserControl包含一个按钮和一些其他控件:
I've got a UserControl that contains a button and some other controls:
<UserControl>
<StackPanel>
<Button x:Name="button" />
...
</StackPanel>
</UserControl>
当我创建一个新的控件的实例,我想得到Button的Command属性: / p>
When I create a new instance of that control, I want to get at the Button's Command property:
<my:GreatUserControl TheButton.Command="{Binding SomeCommandHere}">
</my:GreatUserControl>
当然,TheButton.Command的东西不工作。
Of course, the "TheButton.Command" thing doesn't work.
所以我的问题是:使用XAML,如何在用户控件中设置按钮的.Command属性?
So my question is: Using XAML, how can I set the .Command property of the button inside my user control?
推荐答案
向UserControl添加依赖属性,并将按钮的Command属性绑定到该属性。
Add a dependency property to your UserControl and bind the button's Command property to that.
所以在你的GreatUserControl:
So in your GreatUserControl:
public ICommand SomeCommand
{
get { return (ICommand)GetValue(SomeCommandProperty); }
set { SetValue(SomeCommandProperty, value); }
}
public static readonly DependencyProperty SomeCommandProperty =
DependencyProperty.Register("SomeCommand", typeof(ICommand), typeof(GreatUserControl), new UIPropertyMetadata(null));
在您的GreatUserControl的XAML中:
And in your GreatUserControl's XAML:
<UserControl
x:Class="Whatever.GreatUserControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
x:Name="me"
>
<Button Command="{Binding SomeCommand,ElementName=me}">Click Me!</Button>
</UserControl>
因此,您的按钮绑定到UserControl本身上的命令。现在您可以在父窗口中设置:
So your button binds to the command on the UserControl itself. Now you can set that in your parent window:
<my:GreatUserControl SomeCommand="{Binding SomeCommandHere}" />
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