Csharp pagination class

Chaleampolpumpotong

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Jan 28, 2021

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public class Pagination {
  int totalItem,totalPage, perPage, currentPage, firstPage, lastPage, nextPage, prevPage, from, to;
  public int TotalItem { get => totalItem; set => totalItem = value; }
  public int TotalPage { get => totalPage; set => totalPage = value; }
  public int PerPage { get => perPage; set => perPage = value; }
  public int CurrentPage { get => currentPage; set => currentPage = value; }
  public int FirstPage { get => firstPage; set => firstPage = value; }
  public int LastPage { get => lastPage; set => lastPage = value; }
  public int NextPage { get => nextPage; set => nextPage = value; }
  public int PrevPage { get => prevPage; set => prevPage = value; }
  public int From { get => from; set => from = value; }
  public int To { get => to; set => to = value; }
  
  public static Pagination NonLoopPaginator(int totalItem, int itemPerpage, int currentPage = 0)
  {
    Pagination pagination = new Pagination();
    pagination.totalItem = totalItem;
    pagination.perPage = itemPerpage;
    pagination.FirstPage = 0;
    pagination.TotalPage = (int)Math.Ceiling((decimal)totalItem / (decimal)itemPerpage);
    pagination.LastPage = pagination.TotalPage - 1;
    if (currentPage > pagination.LastPage) pagination.CurrentPage = pagination.LastPage;
    else if (currentPage < pagination.FirstPage) pagination.CurrentPage = pagination.FirstPage;
    else pagination.CurrentPage = currentPage;
    pagination.PrevPage = pagination.CurrentPage > 0 ? pagination.CurrentPage - 1 : 0;
    pagination.NextPage = pagination.CurrentPage < pagination.LastPage ? pagination.CurrentPage + 1 : pagination.LastPage;
    pagination.From = itemPerpage * pagination.CurrentPage;
    pagination.To = (pagination.From + itemPerpage) > totalItem ? (totalItem) : (pagination.From + itemPerpage);
    return pagination;
  }
  
  public static Pagination LoopPaginator(int totalItem, int itemPerpage, int currentPage = 0)
  {
    Pagination pagination = new Pagination();
    pagination.totalItem = totalItem;
    pagination.perPage = itemPerpage;
    pagination.FirstPage = 0;
    pagination.TotalPage = (int)Math.Ceiling((decimal)totalItem / (decimal)itemPerpage);
    pagination.LastPage = pagination.TotalPage - 1;
    if (currentPage > pagination.LastPage) pagination.CurrentPage = pagination.FirstPage;
    else if (currentPage < pagination.FirstPage) pagination.CurrentPage = pagination.lastPage;
    else pagination.CurrentPage = currentPage;
    pagination.PrevPage = pagination.CurrentPage > 0 ? pagination.CurrentPage - 1 : pagination.LastPage;
    pagination.NextPage = pagination.CurrentPage < pagination.LastPage ? pagination.CurrentPage + 1 : pagination.FirstPage;
    pagination.From = itemPerpage * pagination.CurrentPage;
    pagination.To = (pagination.From + itemPerpage) > totalItem ? (totalItem) : (pagination.From + itemPerpage);
    return pagination;
  }
  
  public Pagination Next(bool isLoop = false) {
    if (isLoop) return LoopPaginator(this.totalItem, this.perPage, this.currentPage + 1);
    return NonLoopPaginator(this.totalItem, this.perPage, this.currentPage + 1);
  }

  public Pagination Prev(bool isLoop = false)
  {
    if(isLoop) return LoopPaginator(this.totalItem, this.perPage, this.currentPage - 1);
    return NonLoopPaginator(this.totalItem, this.perPage, this.currentPage - 1);
  }
}