防爆pression混合互动：如何设置触发，以寻找按钮的IsEnabled价值？ [英] Expression Blend Interaction: How to set Trigger to Look for IsEnabled Value of Button?

问题描述

我用防爆pression混合4的设计者和我们的环境是.NET 3.5。

此问题可能是简单，你们这些家伙，但它使我相当有问题。

我需要一个交互应用到一个按钮，当按钮被启用，这将触发状态。

在该按钮时，开发者与IsEnabled属性关联的布尔值。我必须与事件名称提供的EventTrigger，那我能想到的唯一的事情就是IsEnabledChanged。然而，当我运行应用程序，这什么也不做。

我如何告诉触发寻找在按钮的IsEnabled属性？

的布尔值的变化

下面是code：

 ＆LT;按钮X：NAME =SaveButton
        命令={结合SaveCommand}
        IsEnabled ={结合IsSaveAllowedBool}＆GT;＆LT; I：Interaction.Triggers＆GT;
   ＆LT; I：的EventTrigger事件名称=IsEnabledChanged＆GT;
        ＆LT; IC：GoToStateAction Statename的=MyState/＆GT;
   ＆LT; /我：＆的EventTrigger GT;
＆LT; /我：Interaction.Triggers＆GT;＆LT; /按钮＆GT;
 

解决方案

我找到了解决我的问题。

我包裹Border元素周围ContentControl中，我试图让显示/基于布尔值消失。 （我以修改控件模板这样做 - 边框元素没有与它相关的控制模板）

然后我绑定的ContentControl中的IsEnabled属性相同的布尔开发商了。我修改了ContentControl中的ControlTemplate中有一个触发时，布尔值改变，将触发。

下面是code：

 ＆LT;风格X：键=MyContentControl的TargetType ={X：类型ContentControl中}＆GT;
        ＆LT; setter属性=模板＆GT;
            ＆LT; Setter.Value＆GT;
                ＆LT;的ControlTemplate的TargetType ={X：类型ContentControl中}＆GT;
                    ＆lt;内容presenter /＆GT;                ＆LT; ControlTemplate.Triggers＆GT;
                        ＆LT;触发属性=IsEnabledVALUE =FALSE＆GT;
                            ＆LT; setter属性=能见度VALUE =折叠/＆GT;                        ＆LT; /触发＆GT;                    ＆LT; /ControlTemplate.Triggers>
                ＆LT; /控件模板＆GT;
            ＆LT; /Setter.Value>
        ＆LT; /二传手＆GT;
    ＆LT; /样式和GT;
＆LT; ContentControl中风格={DynamicResource MyContentControl}
                IsEnabled ={结合IsSaveAllowedBool}＆GT;     ＆LT;！ - 所有我的内容 - ＆GT;＆LT; / ContentControl中＆GT;
 

该解决方案完美地工作。只是想我会分享。

I am a designer using Expression Blend 4 and our environment is .NET 3.5.

This issue may be simple to you guys, but it is causing me quite a problem.

I need to apply an interaction to a button that will trigger a state when the button becomes enabled.

On the button, the developer has a Boolean value associated with the IsEnabled property. I have to supply the EventTrigger with an EventName, and the only thing that I can think of is IsEnabledChanged. However, when I run the app, this does nothing.

How do I tell the Trigger to look for a change in the Boolean value of the IsEnabled property of the button?

Here is the code:

<Button x:Name="SaveButton"
        Command="{Binding SaveCommand}" 
        IsEnabled="{Binding IsSaveAllowedBool}">

<i:Interaction.Triggers>
   <i:EventTrigger EventName="IsEnabledChanged">
        <ic:GoToStateAction StateName="MyState"/>
   </i:EventTrigger>
</i:Interaction.Triggers>

</Button>

解决方案

I found a solution to my problem.

I wrapped a ContentControl around the Border element that I am trying to make appear/disappear based on the Boolean value. (I did this in order to modify a control template - the Border element does not have a control template associated with it)

Then I bound the IsEnabled property of the ContentControl to the same bool the developer had. I modified the ControlTemplate of the ContentControl to have a Trigger that would fire when the Boolean value changed.

Here is the code:

     <Style x:Key="MyContentControl" TargetType="{x:Type ContentControl}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ContentControl}">
                    <ContentPresenter/>

                <ControlTemplate.Triggers>
                        <Trigger Property="IsEnabled" Value="False">
                            <Setter Property="Visibility" Value="Collapsed"/>

                        </Trigger>

                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>




<ContentControl Style="{DynamicResource MyContentControl}" 
                IsEnabled="{Binding IsSaveAllowedBool}">

     <!--  ALL MY CONTENT -->

</ContentControl>

This solution worked perfectly. Just thought I'd share.

这篇关于防爆pression混合互动：如何设置触发，以寻找按钮的IsEnabled价值？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！