/// <summary>
/// 获取固定大小的<see cref="PageItemsCollection{T}"/>
/// </summary>
/// <param name="items"></param>
public PageItemsCollection(IEnumerable <T> items) : base(items)
{
//AddRange(items);
PageCapacity = (uint)Count;
_hasMore = false;
_fetchPage = (a, b) => null;
}
/// <summary>
/// 指定每页项目数量获取一个<see cref="PageItemsCollection{T}"/>对象，并且获取第一页
/// </summary>
/// <param name="capacity">每一页项目数量</param>
/// <param name="fetchPage">获取某一页的方法</param>
public PageItemsCollection(uint capacity, FetchPageDelegate fetchPage) : base()
{
PageCapacity = capacity;
_fetchPage = fetchPage;
_GetFirst();
}
/// <summary>
/// 指定每页项目数量获取一个<see cref="PageItemsCollection{T}"/>对象，并写入第一页的部分内容
/// </summary>
/// <param name="capacity">每一页项目数量</param>
/// <param name="firstpart">第一页的部分内容</param>
/// <param name="fetchpage">获取某一页的方法</param>
public PageItemsCollection(uint capacity, IEnumerable <T> firstpart, FetchPageDelegate fetchpage) : base(firstpart)
{
//AddRange(firstpart);
PageCapacity = capacity;
_fetchPage = fetchpage;
}
/// <summary>
/// 根据已有的完整第一页内容获取一个<see cref="PageItemsCollection{T}"/>对象
/// </summary>
/// <param name="firstpage">完整的第一页的内容，请确保之后的数目与该页数目一致</param>
/// <param name="fetchPage">获取某一页的方法</param>
public PageItemsCollection(IEnumerable <T> firstpage, FetchPageDelegate fetchPage) : base(firstpage)
{
//AddRange(firstpage); //已在base(firstpage中实现)
PageCapacity = (uint)Count;
_fetchPage = fetchPage;
}
