更新xamarin Forms中的类属性

时间:2016-09-06 13:03:28

标签: c# mvvm xamarin.forms

我正在使用xamarin表单处理移动应用程序,我有一个对象列表。我已经在列表中添加了行并使用此 OnPropertyChanged 来提升属性,并在保存项目之后我想更新对象属性列表的状态。我们如何更新状态属性,这是我的代码示例,请检查代码并更新我,谢谢: -

class Test
    {
        public int ID{ get; set; }
        public string Name { get; set; }
        public bool Status { get; set; }
    }
    class Consume : BaseViewModel
    {
        void main()
        {
            ObservableCollection<Test> coll = new ObservableCollection<Test>();
            coll = await db.GetData();

            foreach (var item in coll)
            {
                item.Status = true;
                //How we can update Status property of class
                OnPropertyChanged("Status");
            }
        }
    }

1 个答案:

答案 0 :(得分:1)

INotifyPropertyChanged课程中实施Test

    class Test : INotifyPropertyChanged
    {
        public int ID { get; set; }
        public string Name { get; set; }

        private bool _status;
        public bool Status
        {
            get { return _status; }
            set
            {
                _status = value;
                RaisePropertyChanged();
            }
        }

        #region INotifyPropertyChanged implementation

        public event PropertyChangedEventHandler PropertyChanged;

        private void RaisePropertyChanged([CallerMemberName]string propertyName = "")
        {
            Volatile.Read(ref PropertyChanged)?.Invoke(this, new PropertyChangedEventArgs(propertyName));
        }

        #endregion
    }

如果你有正确的绑定,在item.Status = true; UI之后将更改此属性。