Bean/ObservableDictionary.cs

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using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Linq;

namespace XStart2._0.Bean {
    /// <summary>
    /// 属性变更通知字典集合
    /// </summary>
    /// <typeparam name="TKey"></typeparam>
    /// <typeparam name="TValue"></typeparam>
    public class ObservableDictionary<TKey, TValue> : Dictionary<TKey, TValue>, INotifyCollectionChanged, INotifyPropertyChanged {
        public ObservableDictionary() : base() { }

        private int _index;
        public event NotifyCollectionChangedEventHandler CollectionChanged;
        public event PropertyChangedEventHandler PropertyChanged;

        public new KeyCollection Keys => base.Keys;

        public new ValueCollection Values => base.Values;

        public new int Count => base.Count;

        public new TValue this[TKey key] {
            get => GetValue(key);
            set => SetValue(key, value);
        }

        public TValue this[int index] {
            get => GetIndexValue(index);
            set => SetIndexValue(index, value);
        }

        public new void Add(TKey key, TValue value) {
            base.Add(key, value);
            OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add, FindPair(key), _index));
            OnPropertyChanged("Keys");
            OnPropertyChanged("Values");
            OnPropertyChanged("Count");
        }

        public new void Clear() {
            base.Clear();
            OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
            OnPropertyChanged("Keys");
            OnPropertyChanged("Values");
            OnPropertyChanged("Count");
        }

        public new bool Remove(TKey key) {
            KeyValuePair<TKey, TValue> pair = FindPair(key);
            if (base.Remove(key)) {
                OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove, pair, _index));
                OnPropertyChanged("Keys");
                OnPropertyChanged("Values");
                OnPropertyChanged("Count");
                return true;
            }