对 WPF 控件的类文件访问,如代码隐藏
本文关键字:代码 隐藏 访问 文件 WPF 控件 | 更新日期: 2023-09-27 18:35:14
我有三个文件,分别是myfile.xaml,myfile.xaml.cs还有一个类名:myclass.cs。
是否可以组合三个文件可以相互访问。
我想要的是,我想要myclass.css可以像代码一样访问所有WPF控件(myfile.xaml.cs),我花了2天,但仍然没用,所以我真的需要有人回答我的问题,如果你知道这个问题。
请帮帮我!
这myclass.cs
做什么?也许它根本不应该直接访问这些 WPF 控件。在其中实现一些事件,然后将窗口绑定到这些事件可能是一种更好、更干净、更易于维护的方法。
简单、可编译的示例:
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
(代码隐藏文件)
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;
}
}
}