具备界面基础功能

SHH.CameraDashboard/Core/RelayCommand.cs

@@ -0,0 +1,65 @@
+using System.Windows.Input;
+
+namespace SHH.CameraDashboard;
+
+// ===========================================================================
+// 1. 新增：非泛型 RelayCommand (支持 new RelayCommand(Method, Check))
+// ===========================================================================
+public class RelayCommand : ICommand
+{
+    private readonly Action<object> _execute;
+    private readonly Predicate<object> _canExecute;
+
+    public RelayCommand(Action<object> execute, Predicate<object> canExecute = null)
+    {
+        _execute = execute ?? throw new ArgumentNullException(nameof(execute));
+        _canExecute = canExecute;
+    }
+
+    public bool CanExecute(object parameter)
+    {
+        return _canExecute == null || _canExecute(parameter);
+    }
+
+    public void Execute(object parameter)
+    {
+        _execute(parameter);
+    }
+
+    public event EventHandler CanExecuteChanged
+    {
+        add => CommandManager.RequerySuggested += value;
+        remove => CommandManager.RequerySuggested -= value;
+    }
+}
+
+// ===========================================================================
+// 2. 保留：泛型 RelayCommand<T> (支持 new RelayCommand<string>(Method...))
+// ===========================================================================
+public class RelayCommand<T> : ICommand
+{
+    private readonly Action<T> _execute;
+    private readonly Predicate<T> _canExecute;
+
+    public RelayCommand(Action<T> execute, Predicate<T> canExecute = null)
+    {
+        _execute = execute ?? throw new ArgumentNullException(nameof(execute));
+        _canExecute = canExecute;
+    }
+
+    public bool CanExecute(object parameter)
+    {
+        return _canExecute == null || _canExecute((T)parameter);
+    }
+
+    public void Execute(object parameter)
+    {
+        _execute((T)parameter);
+    }
+
+    public event EventHandler CanExecuteChanged
+    {
+        add => CommandManager.RequerySuggested += value;
+        remove => CommandManager.RequerySuggested -= value;
+    }
+}