public void NavigateToPage(PaginationAction direction)
{
if (direction == PaginationAction.Next)
{
if (CurPage < PagesCount)
{
if (CurPage == EndPage)
{
SetPagerSize(PaginationAction.Forward);
}
CurPage += 1;
}
}
else if (direction == PaginationAction.Previous)
{
if (CurPage > 1)
{
if (CurPage == StartPage)
{
SetPagerSize(PaginationAction.Back);
}
CurPage -= 1;
}
}
UpdateList(CurPage);
}
public string GetUrl(UrlHelper urlHelper, PaginationAction action, int page = 0)
{
var baseUrl = this.Link.GetUrl(urlHelper);
var delim = baseUrl.Contains('?') ? '&' : '?';
if (action != PaginationAction.Page)
{
page = Math.Min(this.MaxPages, Math.Max(0, (this.CurrentPage + (action == PaginationAction.Next ? +1 : -1))));
}
return(string.Format("{0}{1}o={2}&c={3}", baseUrl, delim, page * this.Count, this.Count));
}
private void Navigate(PaginationAction paginationAction)
{
switch (paginationAction)
{
case PaginationAction.First:
CurrentPage = 1;
ItemSource = new ObservableCollection <object>(ImageFetcher.GetItemsFromDataSource(CurrentPage, PageSize, searchString));
break;
case PaginationAction.Last:
CurrentPage = TotalPages;
ItemSource = new ObservableCollection <object>(ImageFetcher.GetItemsFromDataSource(CurrentPage, PageSize, searchString));
break;
case PaginationAction.Next:
if (CurrentPage < TotalPages - 1)
{
CurrentPage++;
ItemSource = new ObservableCollection <object>(ImageFetcher.GetItemsFromDataSource(CurrentPage, PageSize, searchString));
}
break;
case PaginationAction.Previous:
if (CurrentPage > 1)
{
CurrentPage--;
ItemSource = new ObservableCollection <object>(ImageFetcher.GetItemsFromDataSource(CurrentPage, PageSize, searchString));
}
break;
case PaginationAction.OnInit:
CurrentPage = 1;
int totalRecords = ImageFetcher.GetTotalRecords(searchString);
if (totalRecords > 0)
{
TotalPages = Convert.ToUInt32(totalRecords) / PageSize;
}
ItemSource = new ObservableCollection <object>(ImageFetcher.GetItemsFromDataSource(CurrentPage, PageSize, searchString));
break;
}
}
public void SetPagerSize(PaginationAction direction)
{
if (direction == PaginationAction.Forward && EndPage < PagesCount)
{
StartPage = EndPage + 1;
if (EndPage + pagerSize < PagesCount)
{
EndPage = StartPage + pagerSize - 1;
}
else
{
EndPage = PagesCount;
}
StateHasChanged();
}
else if (direction == PaginationAction.Back && StartPage > 1)
{
EndPage = StartPage - 1;
StartPage = StartPage - pagerSize;
}
CurPage = StartPage;
UpdateList(CurPage);
}
