wpf MultiTrigger：绑定到 DependencyProperty 的条件不起作用

MultiTrigger: Condition Binding to DependencyProperty doesn't work

提问by TorbenJ

I have a custom button MainMenuButtonof type UserControland atm I'm styling it. Now I wanted to implement a MultiTriggerto only change the appearance of the button if two conditions are met.

我有一个自定义按钮MainMenuButton类型UserControl和 atm 我正在设计它。现在我想实现 aMultiTrigger仅在满足两个条件时更改按钮的外观。

The first condition is if IsMouseOver == true. I simply put the following Condition:

第一个条件是 if IsMouseOver == true。我简单地提出以下几点Condition：

<MultiTrigger>
    <MultiTrigger.Conditions>
        <Condition Property="IsMouseOver" Value="True"/>
    </MultiTrigger.Conditions>
    <MultiTrigger.EnterActions>
        <Setter TargetName="LayoutRoot" Property="Background" Value="Red">
    </MultiTrigger.EnterActions>
    <MultiTrigger.ExitActions>
        <Setter TargetName="LayoutRoot" Property="Background" Value="Black">
    </MultiTrigger.ExitActions>
</MultiTrigger>

The second condition is related to a DependencyProperty:

第二个条件与 a 相关DependencyProperty：

public static readonly DependencyProperty IsCheckedProperty = DependencyProperty.Register("IsChecked", typeof(bool), typeof(MainMenuButton), new PropertyMetadata(false));

In another SO posta user said that I can use DataTriggerto react to IsCheckedProperty. So I tried the code from the other post but it didn't work:

在另一篇SO 帖子中，一位用户说我可以DataTrigger用来对IsCheckedProperty. 所以我尝试了另一篇文章中的代码，但没有奏效：

<MultiTrigger>
    <MultiTrigger.Conditions>
        <Condition Property="IsMouseOver" Value="True"/>
        <Condition Binding="{Binding RelativeSource={RelativeSource Mode=Self}, Path=IsChecked}" Value="False"/>
    </MultiTrigger.Conditions>
    <MultiTrigger.EnterActions>
        <BeginStoryboard Storyboard="{StaticResource MouseEnter}"/>
    </MultiTrigger.EnterActions>
    <MultiTrigger.ExitActions>
        <BeginStoryboard Storyboard="{StaticResource MouseLeave}"/>
    </MultiTrigger.ExitActions>
</MultiTrigger>

How can this be solved? Thanks for any answers! :)

如何解决这个问题？感谢您提供任何答案！:)

回答by TorbenJ

Got it to work in the mean time. I stumbled upon this blog article which contains a working solution: http://anders.janmyr.com/search?q=multidatatrigger

同时让它工作。我偶然发现了这篇包含有效解决方案的博客文章：http: //anders.janmyr.com/search?q=multidatatrigger

Changed my code to the following:

将我的代码更改为以下内容：

<MultiDataTrigger>
                <MultiDataTrigger.Conditions>
                    <Condition Binding="{Binding RelativeSource={RelativeSource Self}, Path=IsMouseOver}" Value="True"/>
                    <Condition Binding="{Binding RelativeSource={RelativeSource Mode=Self}, Path=IsChecked}" Value="True"/>
                </MultiDataTrigger.Conditions>
                <Setter TargetName="LayoutRoot" Property="Background" Value="Red"/>
            </MultiDataTrigger>

Now it works. Anyway thanks to all answerers for their effort!

现在它起作用了。无论如何，感谢所有回答者的努力！

回答by KaluSinghRao

<Window x:Class="DataBinding.MultiTrigger"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MultiTrigger" Height="300" Width="300">
<Window.Resources>
    <Style TargetType="Button">
        <Style.Setters>
            <Setter Property="Background" Value="BlueViolet"></Setter>
            <Setter Property="Foreground" Value="Red"></Setter>
        </Style.Setters>
        <Style.Triggers>
            <MultiTrigger>
                <MultiTrigger.Conditions>
                    <!--Use only one conditions for Implementations-->
                    <Condition Property="Control.IsFocused" Value="True"></Condition>
                    <Condition Property="Control.IsMouseOver" Value="True"></Condition>
                </MultiTrigger.Conditions>
                <MultiTrigger.Setters>
                    <Setter Property="Background" Value="Green"></Setter>
                    <Setter Property="Foreground" Value="White"></Setter>
                </MultiTrigger.Setters>
            </MultiTrigger>
        </Style.Triggers>
    </Style>
</Window.Resources>
<Button Height="50">The World Game</Button>

回答by Rohit Vats

I guess in your style you haven't specified the correct TargetType. This should work -

我猜在你的风格中你没有指定正确的TargetType. 这应该有效 -

<Style TargetType="{x:Type local:MainMenuButton}">
   <MultiTrigger>
    <MultiTrigger.Conditions>
        <Condition Property="IsMouseOver" Value="True"/>
        <Condition Binding="IsChecked" Value="False"/>
    </MultiTrigger.Conditions>
    // Your setter goes here
</MultiTrigger>
</Style>

Namespace localshould be added in xaml which corresponds to the namespace where your MainMenuButton class resides.

命名空间local应该添加到 xaml 中，它对应于 MainMenuButton 类所在的命名空间。

回答by Sebastian Dymel

I think you dont need to bind to your DP, try using just Property="IsChecked" as for the IsMouseOver.

我认为您不需要绑定到您的 DP，尝试仅使用 Property="IsChecked" 作为 IsMouseOver。