C# (CSharp) Microsoft.Maui.Controls Command.CanExecute示例

示例#1

        void RefreshCommandCanExecuteChanged(object sender, EventArgs eventArgs)
        {
            if (IsRefreshing)
            {
                return;
            }

            if (Command != null)
            {
                SetValueCore(IsEnabledProperty, Command.CanExecute(CommandParameter));
            }
            else
            {
                SetValueCore(IsEnabledProperty, true);
            }
        }

示例#2

 void OnCommandCanExecuteChanged(object sender, EventArgs eventArgs)
 {
     IsEnabled = Command.CanExecute(CommandParameter);
 }