公开DependencyProperty [英] Expose DependencyProperty

问题描述

在开发WPF UserControls时，将一个子控件的DependencyProperty暴露为UserControl的DependencyProperty的最佳方式是什么？以下示例显示了当前如何在UserControl中公开TextBox的Text属性。确实有一个更好/更简单的方法来实现这一点？

When developing WPF UserControls, what is the best way to expose a DependencyProperty of a child control as a DependencyProperty of the UserControl? The following example shows how I would currently expose the Text property of a TextBox inside a UserControl. Surely there is a better / simpler way to accomplish this?

<UserControl x:Class="WpfApplication3.UserControl1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <StackPanel Background="LightCyan">
        <TextBox Margin="8" Text="{Binding Text, RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type UserControl}}}" />
    </StackPanel>
</UserControl>


using System;
using System.Windows;
using System.Windows.Controls;

namespace WpfApplication3
{
    public partial class UserControl1 : UserControl
    {
        public static DependencyProperty TextProperty = DependencyProperty.Register("Text", typeof(string), typeof(UserControl1), new PropertyMetadata(null));
        public string Text
        {
            get { return GetValue(TextProperty) as string; }
            set { SetValue(TextProperty, value); }
        }

        public UserControl1() { InitializeComponent(); }
    }
}

推荐答案

这就是我们在我们的团队中如何做，没有RelativeSource搜索，而是通过用UserControl的名字命名UserControl和引用属性。

That is how we're doing it in our team, without the RelativeSource search, rather by naming the UserControl and referencing properties by the UserControl's name.

<UserControl x:Class="WpfApplication3.UserControl1" x:Name="UserControl1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <StackPanel Background="LightCyan">
        <TextBox Margin="8" Text="{Binding Path=Text, ElementName=UserControl1}" />
    </StackPanel>
</UserControl>

有时候，我们发现自己做了太多的事情UserControl，虽然经常缩小我们的使用。我也会遵循像PART_TextDisplay这样的文本框命名的东西，或者某些东西，以便将来您可以将其模板化，然后保持代码相同的传统。

Sometimes we've found ourselves making too many things UserControl's though, and have often times scaled back our usage. I'd also follow the tradition of naming things like that textbox along the lines of PART_TextDisplay or something, so that in the future you could template it out yet keep the code-behind the same.

这篇关于公开DependencyProperty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IT屋！