/// <summary>
/// Adds an item to the dictionary.
/// </summary>
/// <param name = "item">The item to add.</param>
public void Add(ObservableKeyValuePair <TKey, TValue> item)
{
if (this._BaseDictionary.ContainsKey(item.Key))
{
throw new ArgumentException("Dictionary already contains key.");
}
this._BaseDictionary[item.Key] = item.Value;
this._BaseCollection.Add(item);
this._IndexDictionary[item.Key] = this._BaseCollection.Count - 1;
this.Subscribe(item);
this.OnPropertyChanged("Count");
this.OnPropertyChanged("Item[]");
this.OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Add,
item,
this._IndexDictionary[item.Key]));
}
/// <summary>
/// Removes an item from the dictionary.
/// </summary>
/// <param name = "item">The item to remove.</param>
/// <returns>true if the item was removed. false otherwise.</returns>
public bool Remove(ObservableKeyValuePair <TKey, TValue> item)
{
if (!this.Contains(item))
{
return(false);
}
int index = this._IndexDictionary[item.Key];
this._BaseCollection.RemoveAt(index);
for (int x = index; x < this._BaseCollection.Count; x++)
{
this._IndexDictionary[this._BaseCollection[x].Key] = x;
}
this._BaseDictionary.Remove(item.Key);
this._IndexDictionary.Remove(item.Key);
this.Unsubscribe(item);
this.OnPropertyChanged("Count");
this.OnPropertyChanged("Item[]");
this.OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Remove,
item,
index));
return(true);
}
private void Subscribe(ObservableKeyValuePair <TKey, TValue> item)
{
item.PropertyChanged += this.ItemPropertyChanged;
}
/// <summary>
/// Checks to see whether the item is in the dictionary.
/// </summary>
/// <param name = "item">The item to search for.</param>
/// <returns>true if the item is in the dictionary. false otherwise.</returns>
public bool Contains(ObservableKeyValuePair <TKey, TValue> item)
{
return(this._BaseCollection.Contains(item));
}
