65 lines
2.0 KiB
C#
65 lines
2.0 KiB
C#
using System.Windows.Input;
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namespace SHH.CameraDashboard;
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// ===========================================================================
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// 1. 新增：非泛型 RelayCommand (支持 new RelayCommand(Method, Check))
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// ===========================================================================
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public class RelayCommand : ICommand
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{
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private readonly Action<object> _execute;
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private readonly Predicate<object> _canExecute;
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public RelayCommand(Action<object> execute, Predicate<object> canExecute = null)
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{
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_execute = execute ?? throw new ArgumentNullException(nameof(execute));
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_canExecute = canExecute;
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}
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public bool CanExecute(object parameter)
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{
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return _canExecute == null || _canExecute(parameter);
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}
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public void Execute(object parameter)
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{
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_execute(parameter);
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}
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public event EventHandler CanExecuteChanged
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{
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add => CommandManager.RequerySuggested += value;
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remove => CommandManager.RequerySuggested -= value;
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}
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}
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// ===========================================================================
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// 2. 保留：泛型 RelayCommand<T> (支持 new RelayCommand<string>(Method...))
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// ===========================================================================
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public class RelayCommand<T> : ICommand
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{
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private readonly Action<T> _execute;
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private readonly Predicate<T> _canExecute;
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public RelayCommand(Action<T> execute, Predicate<T> canExecute = null)
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{
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_execute = execute ?? throw new ArgumentNullException(nameof(execute));
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_canExecute = canExecute;
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}
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public bool CanExecute(object parameter)
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{
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return _canExecute == null || _canExecute((T)parameter);
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}
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public void Execute(object parameter)
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{
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_execute((T)parameter);
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}
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public event EventHandler CanExecuteChanged
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{
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add => CommandManager.RequerySuggested += value;
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remove => CommandManager.RequerySuggested -= value;
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}
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} |