/// <summary>
/// 集合的项发生变化时发生的方法。
/// </summary>
/// <param name="itemIndex">集合的索引。</param>
/// <param name="item">集合的项。</param>
/// <param name="action">操作类型。</param>
protected virtual void OnItemChanged(int itemIndex, T item, ItemChangeAction action)
{
if (this.ItemChanged != null)
{
this.ItemChanged(this, new ItemChangeEventArgs <T>(itemIndex, item, action));
}
}
/// <summary>
/// 初始化 <see cref="System.Collections.Generic.ItemChangeEventArgs<T>"/> 的新实例。
/// </summary>
/// <param name="itemIndex">项索引。</param>
/// <param name="tiem">项。</param>
/// <param name="action">变化的原因。</param>
public ItemChangeEventArgs(int itemIndex, T tiem, ItemChangeAction action)
{
this._ItemIndex = itemIndex;
this._Item = Item;
this._Action = action;
}
