两个用户控件之间的通信 [英] Communication between Two UserControls

问题描述

大家好，

我开发了1个wpf应用程序，其中有2个UserControl，并将这两个用户控件放入这样的MainWindow中


在我的第一个UserControl中，我有一个带有命令EditingCommands.ToggleBullets
的切换按钮. 我想将此命令应用于放置在其他UserControl中的RichTextBox控件. (以下说明)

Hi All,

I developed 1 wpf application in which i have 2 UserControls and i am placing these two user controls into a MainWindow like this


In my first UserControl i have an toggle button with command EditingCommands.ToggleBullets
i want to apply this command to RichTextBox control which is placed in a different UserControl
(explained below)

<usercontrol x:class="UserControlEx.BulletControl" xmlns:x="#unknown">
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:src="clr-namespace:UserControlEx"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <dockpanel>
        <togglebutton name="bulletsButton" command="EditingCommands.ToggleBullets">
       CommandTarget="{Binding ElementName=myRtb}" 
       Content="Bullet"
       DockPanel.Dock="Top"
       ToolTip="Bullets">
        </togglebutton>                        
    </dockpanel>
</usercontrol>

在第二个UserControl中，我有一个RichTextBox

In my 2nd UserControl i have an RichTextBox

<usercontrol x:class="UserControlEx.RichTextControl" xmlns:x="#unknown">
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    <dockpanel>        
        <richtextbox x:name="myRtb" />
    </dockpanel>
</usercontrol>

现在我将两个控件都放置到我的MainWindow

Now i am placing both control to my MainWindow

<window x:class="UserControlEx.Window1" xmlns:x="#unknown">
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:src="clr-namespace:UserControlEx"
    Title="Window1" Height="300" Width="300">
    <dockpanel>
        <src:BulletControl DockPanel.Dock="Top" x:Name="userControl1" />
        <src:RichTextControl x:Name="userControl2" />
    </dockpanel>
</window>

现在，我想在按下MainWindow中的切换按钮时应用项目符号命令.

任何想法如何做到这一点.

在此先感谢
Ashish

Now i want to apply a bullet command when i press the toggle button in my MainWindow.

Any Idea How to do this.

Thanks in advance
Ashish

推荐答案

事件聚合可以胜任.

请参阅此处:
MSDN:事件聚合快速入门 [如何:使用Event Aggregator在两个用户控件之间进行通信 [ ^ ]
使用Mediator在用户控件之间进行通信: 2 [

Event Aggregation can do the job.

Refer here:
MSDN: Event Aggregation QuickStart[^]
How To : Communicate between two user-controls using Event Aggregator[^]
Using Mediator to communicate between user controls: Part 2[^]

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