vStationURM/Tools/TranslateTool/ViewModel/AddLanguagePageViewModel.cs

using TranslateTool.Model;

namespace TranslateTool.ViewModel
{
    public class AddLanguagePageViewModel:ViewModel
    {
        private readonly MainPageViewModel _mainPageViewModel;

        private string _errorMessage;

        private string _languageName;

        public string LanguageName
        {
            get => _languageName;
            set
            {
                if (_languageName != value)
                {
                    _languageName = value;
                    OnPropertyChanged(() => LanguageName);
                }
            }
        }

        public string ErrorMessage
        {
            get => _errorMessage;
            set
            {
                if (_errorMessage != value)
                {
                    _errorMessage = value;
                    OnPropertyChanged(() => ErrorMessage);
                }
            }
        }

        public ButtonCommand SubmitCommand { get; }

        public AddLanguagePageViewModel(MainPageViewModel mainPageViewModel)
        {
            _mainPageViewModel = mainPageViewModel;
            SubmitCommand = new ButtonCommand(OnSubmit, "Submit");
        }

        private void OnSubmit(object obj)
        {
            if (string.IsNullOrEmpty(_languageName))
            {
                ErrorMessage = "请输入新增语言名称";
                return;
            }

            _mainPageViewModel.AddLanguage(_languageName);
            OnClosedRequest();
        }
    }
}