1. 事件订阅
public partial class UserControl1 : UserControl{public UserControl1(){InitializeComponent();Application.Current.MainWindow.SizeChanged += MainWindow_SizeChanged;}private void MainWindow_SizeChanged(object sender, SizeChangedEventArgs e){// Handle size changed event}}
2. 匿名函数中捕获对象成员
public partial class UserControl1 : UserControl{public UserControl1(){InitializeComponent();Application.Current.MainWindow.SizeChanged += (s, e) => {Debug.WriteLine($"{e.NewSize.Width - this.Width}");};}}
3. 静态变量
public class MyClass{static List<MyClass> _instances = new List<MyClass>();public MyClass(){_instances.Add(this);}}
4. 非托管资源
public class SomeClass{private IntPtr _buffer;public SomeClass(){_buffer = Marshal.AllocHGlobal(1000);}~SomeClass(){Marshal.FreeHGlobal(_buffer);}}
5. WPF绑定
public class MyViewModel : INotifyPropertyChanged{private string _someText;public string SomeText{get { return _someText; }set{_someText = value;OnPropertyChanged(nameof(SomeText));}}public event PropertyChangedEventHandler PropertyChanged;protected virtual void OnPropertyChanged(string propertyName){PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));}}
总结
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