在ControlTemplate中读取AttachedProperty时遇到问题

问题描述

这是我的附属财产:

public class MyButtonThing
{
    public static string GetText2(DependencyObject obj)
    {
        return (string)obj.GetValue(Text2Property);
    }
    public static void SetText2(DependencyObject obj, string value)
    {
        obj.SetValue(Text2Property, value);
    }
    public static readonly DependencyProperty Text2Property =
        DependencyProperty.RegisterAttached("Text2",
        typeof(string), typeof(System.Windows.Controls.Button));
}

这是我的ControlTemplate:

This is my ControlTemplate:

编辑，它将正常工作:

<Window.Resources>
    <ControlTemplate TargetType="{x:Type Button}"
                     x:Key="MyButtonTemplate">
        <Border>
            <DockPanel LastChildFill="True">
                <TextBlock Text="{TemplateBinding Content}"
                           DockPanel.Dock="Top"/>
                <TextBlock Text={Binding RelativeSource={RelativeSource
                          AncestorType=Button},
                          Path=(local:MyButtonThing.Text2)}"  />
            </DockPanel>
        </Border>
    </ControlTemplate>
</Window.Resources>

<Button Template="{StaticResource MyButtonTemplate}"
        local:MyButtonThing.Text2="Where's Waldo"
        >Hello World</Button>

我的问题吗? Text2可以在Desginer中正确呈现，而不是在运行时呈现.

My problem? Text2 renders properly in the Desginer, not at runtime.

推荐答案

您在按钮上设置了值，该值即被附加，因此:

You set the value on the button, and it is attached, hence:

{Binding RelativeSource={RelativeSource AncestorType=Button},
         Path=(local:MyButtonThing.Text2)}

这篇关于在ControlTemplate中读取AttachedProperty时遇到问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！