添加项目文件。

Utilities/AsyncRelayCommand.cs

@@ -0,0 +1,26 @@
+using System.Windows.Input;
+
+namespace YwxApp.AiChat.Utilities
+{
+    public class AsyncRelayCommand : ICommand
+    {
+        private readonly Func<Task> _execute;
+        private readonly Func<bool> _canExecute;
+
+        public AsyncRelayCommand(Func<Task> execute, Func<bool> canExecute = null)
+        {
+            _execute = execute;
+            _canExecute = canExecute;
+        }
+
+        public event EventHandler CanExecuteChanged
+        {
+            add => CommandManager.RequerySuggested += value;
+            remove => CommandManager.RequerySuggested -= value;
+        }
+
+        public bool CanExecute(object parameter) => _canExecute?.Invoke() ?? true;
+
+        public async void Execute(object parameter) => await _execute();
+    }
+}