结合价值ConverterParameter [英] Binding value as ConverterParameter

问题描述

在我的ResourceDictionary我有以下样式：

In my resourceDictionary I have a following style:

 <Style TargetType="{x:Type propgrid:PropertyGridDataAccessorItem}" x:Key="{x:Type propgrid:PropertyGridDataAccessorItem}">
            <Style.Triggers>
                <Trigger Property="DataAccessorType" Value="Category">
                    <Setter Property="IsExpanded" Value="{Binding DisplayName, Converter={local:ExpandedCategoryConverter}}"/>
                </Trigger>
            </Style.Triggers>
  </Style>

我需要一个值从我的ViewModel到ConverterParameter，像ConverterParameter = {myProperty的绑定绑定}，但我们不能绑定到ConverterParameter。

I need to bind a value from my viewModel to ConverterParameter, something like ConverterParameter = {Binding MyProperty}, but we can't bind to a ConverterParameter.

我怎样才能解决这个问题呢？

How can I solve this issue?

日Thnx提前

推荐答案

正如你所发现的，你不能绑定 ConverterParameter ，因为它不是一个依赖项属性。

As you have discovered, you cannot bind ConverterParameter because it's not a dependency property.

在大多数情况下这种情况的解决方案是简单地使用 MultiBinding 和多值转换器，而不是，例如：

Most of the time the solution for this is to simply use a MultiBinding and a multi value converter instead, for example:

<Trigger Property="DataAccessorType" Value="Category">
  <Setter Property="IsExpanded">
    <Setter.Value>
      <MultiBinding Converter="{local:ExpandedCategoryConverter}">
        <Binding Path="DisplayName"/>
        <Binding Path="WhatYouWantToPassInAsConverterParameter"/>
      </MultiBinding>
    </Setter.Value>
  </Setter>
</Trigger>

转换器当然会需要适当更新。

The converter would of course need to be updated appropriately.

这篇关于结合价值ConverterParameter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！