在 WPF 中使用值转换器而不必先将它们定义为资源 [英] Using Value Converters in WPF without having to define them as resources first

问题描述

是否可以使用值转换器而无需事先将它们定义为资源?

Is it possible to use value converters without having to define them beforehand as resources?

现在我有

<Window.Resources>
    <local:TrivialFormatter x:Key="trivialFormatter" />
</Window.Resources>

和

<Button Width="{Binding Width, 
               ElementName=textBox1, 
               UpdateSourceTrigger=PropertyChanged, 
               Converter={StaticResource trivialFormatter}}">

难道不是我不必在 Window.Resources 中声明 trivialFormatter 资源，而是直接从 Button 的宽度绑定中引用它吗?类似的东西

Wouldn't it be possible that instead of having to declare the trivialFormatter resource in Window.Resources, I could directly refer it from the Button's width binding? Something like

Converter = {local:TrivialFormatter}

谢谢

推荐答案

在单例类型 IValueConverter 的情况下(例如，它们不需要来自当前绑定实例的任何状态)我使用静态转换器，即:

In the case of singleton-type IValueConverters (e.g. they don't need any state from the current binding instance) I use static converters, i.e.:

Converter={x:Static SomeNamespace:SomeConverter.Instance}

WPF 博士还发表了一篇关于使用标记扩展使其更清晰的内联文章 此处.

There's also a great post by Dr. WPF on using a markup extension to make it cleaner inline here.

这篇关于在 WPF 中使用值转换器而不必先将它们定义为资源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！