在WPF中从另一个窗口管理用户控件 [英] Managing user controls from another window in WPF

问题描述

我正在使用WPF，并且有一个MainWindow.xaml，我也有一个用户控件Page_SwitcherMenu.xaml，实际上这对于其他用户控件来说很常见。



我在Page_SwitcherMenu.xaml中有一个监控网络活动的标签，如果局域网已关闭，标签背景变为红色。



我需要在MainWindow.xaml.cs中实现代码，标签名称为lbl_LAN，位于Page_SwitcherMenu.xaml。



我该怎么做？我试图使用绑定但没有设法。



我尝试过的事情：



MainWindow.xaml.cs包含以下内容：

  public  MainWindow（）
 {
 InitializeComponent（）; 
  this  .WindowStyle = WindowStyle.None; 
 此 .AllowsTransparency =  false ; 
 PageSwitcher.pageSwitcher = 此; 
 PageSwitcher.Switch（ new  Page_Info（））; 
 
 NetworkChange.NetworkAvailabilityChanged + =  new  NetworkAvailabilityChangedEventHandler（NetworkChange_NetworkAvailabilityChanged）; 
} 
 
  void  NetworkChange_NetworkAvailabilityChanged（ object  sender，NetworkAvailabilityEventArgs e） 
 {
 GlobalData.NetworkOnline = e.IsAvailable; 
  if （GlobalData.NetworkOnline ==  true ）
 
 < b> lbl_LAN  .Background = Brushes.PaleGreen; 
  else  
  lbl_LAN  .Background = Brushes.Red; 
} 

解决方案

由于这个问题非常受欢迎，我以前的答案往往不太清楚，可能不太清楚，我决定写一篇提示/技巧文章，详细的代码示例和解释：许多问题一次回答 - Windows窗体或WPF Windows之间的协作。

-SA

I am using WPF, and have a MainWindow.xaml, also I have a user control Page_SwitcherMenu.xaml, practically this is common for other user controls.

I have a label in Page_SwitcherMenu.xaml which monitors network activity, if LAN is down label background turns red.

I need to implement the code in MainWindow.xaml.cs, the label name is lbl_LAN and is located in Page_SwitcherMenu.xaml.

How can I do this? I have tried to use binding but did not manage to.

What I have tried:

MainWindow.xaml.cs contains the following:

public MainWindow()
        {
            InitializeComponent();
            this.WindowStyle = WindowStyle.None;
            this.AllowsTransparency = false;
            PageSwitcher.pageSwitcher = this;
            PageSwitcher.Switch(new Page_Info());

            NetworkChange.NetworkAvailabilityChanged += new NetworkAvailabilityChangedEventHandler(NetworkChange_NetworkAvailabilityChanged);
        }

 void NetworkChange_NetworkAvailabilityChanged(object sender, NetworkAvailabilityEventArgs e)
        {
            GlobalData.NetworkOnline = e.IsAvailable;
            if (GlobalData.NetworkOnline == true)             
               
                lbl_LAN.Background = Brushes.PaleGreen;
            else
                lbl_LAN.Background = Brushes.Red;
        }

解决方案

As the question turned out to be very popular, and my previous answers often were not well understood, probably were not clear enough, I decided to write a Tips/Trick article complete with detailed code samples and explanations: Many Questions Answered at Once — Collaboration between Windows Forms or WPF Windows.

—SA

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