類文件訪問WPF控件，如代碼behinde

Question

我有三個文件myfile.xaml，myfile.xaml.cs和另一個類名：myclass.cs。

是否有可能將三個文件組合成可以互相訪問。我想要的是myclass.css可以像代碼behinde（myfile.xaml.cs）一樣訪問所有的WPF控件，我花了2天，但仍然沒用，所以我真的需要有人回答我的問題，如果你知道這個問題。

請幫幫我！

Answer 1

這是什麼myclass.cs？也許它不應該直接訪問那些WPF控件。在其中實施一些事件，然後將窗口綁定到這些事件可能會有更好，更清潔和更易維護的方法。

簡單，編譯例如：

MyClass.cs

namespace WpfApplication1 
{ 
    // this class does not know anything about the window directly 
    public class MyClass 
    { 
     public void DoSomething() 
     { 
      if (OnSendMessage != null) // is anybody listening? 
      { 
       OnSendMessage("I'm sending a message"); // i don't know and i don't care where it will go 
      } 
     } 

     public event SendMessageDelegate OnSendMessage; // anyone can subscribe to this event 
    } 

    public delegate void SendMessageDelegate(string message); // what is the event handler method supposed to look like? 
    // it's supposed to return nothing (void) and to accept one string argument 
} 

Window1.xaml

<Window x:Class="WpfApplication1.Window1" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    Title="Window1" Height="300" Width="300"> 
    <Grid> 
     <TextBox Name="tbMessage" /> <!-- just a textbox --> 
    </Grid> 
</Window> 

Window1.xaml.cs（代碼隱藏文件）

using System.Windows; 

namespace WpfApplication1 
{ 
    public partial class Window1 : Window 
    { 
     public Window1() 
     { 
      InitializeComponent(); 
      var myClass = new MyClass(); 
      myClass.OnSendMessage += new SendMessageDelegate(myClass_OnSendMessage); // subscribing to the event 

      myClass.DoSomething(); // this will call the event handler and display the message in the textbox. 

      // we subscribed to the event. MyClass doesn't need to know anything about the textbox. 
     } 

     // event handler 
     void myClass_OnSendMessage(string message) 
     { 
      tbMessage.Text = message; 
     } 
    } 
}