feat: 初始功能

Infrastructure/RelayCommand.cs

@@ -0,0 +1,28 @@
+using System.Windows.Input;
+
+namespace CloudPrint.Client.Infrastructure;
+
+public sealed class RelayCommand : ICommand
+{
+    private readonly Action<object?> _execute;
+    private readonly Predicate<object?>? _canExecute;
+
+    public RelayCommand(Action execute, Func<bool>? canExecute = null)
+        : this(_ => execute(), canExecute is null ? null : _ => canExecute())
+    {
+    }
+
+    public RelayCommand(Action<object?> execute, Predicate<object?>? canExecute = null)
+    {
+        _execute = execute ?? throw new ArgumentNullException(nameof(execute));
+        _canExecute = canExecute;
+    }
+
+    public event EventHandler? CanExecuteChanged;
+
+    public bool CanExecute(object? parameter) => _canExecute?.Invoke(parameter) ?? true;
+
+    public void Execute(object? parameter) => _execute(parameter);
+
+    public void RaiseCanExecuteChanged() => CanExecuteChanged?.Invoke(this, EventArgs.Empty);
+}