如何为WPF中的用户控件创建用户定义（新）事件？一个小例子 [英] How to create user define (new) event for user control in WPF ?one small example

问题描述

我有一个用户控件，我正在使用一个画布，在该画布中，一个矩形有
，所以我想为该用户控件（画布+矩形）创建一个点击事件，我想使用主窗口..
的问题是我想为该用户创建一个新的点击事件control.so如何做到这一点
亲切地展示一些小例子或显示这个特殊的代码在

解决方案

关于如何公开主窗口可以注册的UserControl的事件的简要示例：

您的Usercontrol

1。添加以下decleration：

  public event EventHandler UserControlClicked; 
  

2。在您的UserControl_Clicked事件 引发事件 中，如下所示：

  private void UserControl_MouseDown（object sender，MouseButtonEventArgs e）
 {
 if（UserControlClicked！= null）
 {
 UserControlClicked（this，EventArgs.Empty）; 
} 
} 
  

在您的MainWindow 中：

您的用户控件现在将有一个 UserControlClicked 事件，您可以注册到：

 < local：UserControl1 x：Name =UCUserControlClicked =UC_OnUserControlClicked/> 
  

i have a one usercontrol in which i am using one canvas and in that canvas one rectangle is there so i want to create a click event for that user control(canvas+rectangle) which i want to use in main window.. the question is I want to create a new click event for that user control.so how to do it kindly show little example or show me code of this particular on

解决方案

A brief example on how to expose an event from the UserControl that the main window can register:

In your Usercontrol

1 . Add the following decleration:

public event EventHandler UserControlClicked;

2 . In your UserControl_Clicked event raise the event like this:

 private void UserControl_MouseDown(object sender, MouseButtonEventArgs e)
 {
        if (UserControlClicked != null)
        {
            UserControlClicked(this, EventArgs.Empty);
        }
  }

In your MainWindow:

Your usercontrol will now have a UserControlClicked event which you can register to:

<local:UserControl1 x:Name="UC" UserControlClicked="UC_OnUserControlClicked" />

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