public void UpdatePaging(PagerContext pagerContext, PageContext pageContext)
{
PagerContext = pagerContext;
PageContext = pageContext;
DataBindChildren();
Visible = PageContext != null && PageContext.PageCount > 1;
}
public PageContext CreatePageContext(PagerContext pagerContext, long firstItemIndex, long lastItemIndex, long itemCount, long pageIndex, long pageCount)
{
return(new PageContext(
firstItemIndex: firstItemIndex,
lastItemIndex: lastItemIndex,
itemCount: itemCount,
pageIndex: pageIndex,
pageCount: pageCount,
pageLinks: GeneratePageLinks(pagerContext, firstItemIndex, lastItemIndex, itemCount, pageIndex).ToArray()));
}
void SqlDataSource_Selected(object sender, SqlDataSourceStatusEventArgs e)
{
var pagerContext = new PagerContext(EffectivePageSizes, EffectivePageSize, EffectiveDisplayedPageSelectorCount);
var pageContext = _Pager.CreatePageContext(
pagerContext,
firstItemIndex: Math.Max(0, e.Command.Parameters["@_paging_firstRowIndex"].Value <long>() - 1), // Convert from 1-based to 0-based
lastItemIndex: Math.Max(0, e.Command.Parameters["@_paging_lastRowIndex"].Value <long>() - 1), // Convert from 1-based to 0-based
itemCount: e.Command.Parameters["@_paging_rowCount"].Value <long>(),
pageIndex: Math.Max(0, e.Command.Parameters["@_paging_pageIndex"].Value <long>() - 1), // Convert from 1-based to 0-based
pageCount: e.Command.Parameters["@_paging_pageCount"].Value <long>());
_UpperPagingControls.UpdatePaging(pagerContext, pageContext);
_LowerPagingControls.UpdatePaging(pagerContext, pageContext);
}
public IEnumerable <PageLink> GeneratePageLinks(PagerContext pagerContext, long firstItemIndex, long lastItemIndex, long itemCount, long pageIndex)
{
yield return(new PageLink(
display: "«",
itemIndex: 0,
enabled: firstItemIndex > 0));
yield return(new PageLink(
display: "‹",
itemIndex: firstItemIndex / pagerContext.PageSize * pagerContext.PageSize - pagerContext.PageSize,
enabled: firstItemIndex > 0));
var halfPageSelectors = pagerContext.DisplayedPageSelectorCount / 2;
var directPageLinks = Enumerable
.Range(-pagerContext.DisplayedPageSelectorCount, pagerContext.DisplayedPageSelectorCount * 2) // Take the range of page selectors negative and positive
.Select(index => index * pagerContext.PageSize + firstItemIndex) // Map to item indices relative to the current page
.Where(itemIndex => itemIndex >= 0) // Keep item indicies within allowed range
.Where(itemIndex => itemIndex < itemCount) // Keep item indicies within allowed range
.Select(itemIndex => new
{
itemIndex,
pageIndex = itemIndex / pagerContext.PageSize, // Generate a page number from the item number
})
.Where(page => page.pageIndex >= pageIndex - halfPageSelectors) // Ensure that if there a full amount of page
.Where(page => page.pageIndex <= pageIndex + halfPageSelectors || pageIndex < halfPageSelectors) // selectors are always shown, even at the ends
.Take(pagerContext.DisplayedPageSelectorCount);
foreach (var page in directPageLinks)
{
yield return(new PageLink(
display: (page.pageIndex + 1).ToString(),
itemIndex: page.itemIndex,
enabled: page.pageIndex != pageIndex,
current: page.pageIndex == pageIndex));
}
yield return(new PageLink(
display: "›",
itemIndex: firstItemIndex / pagerContext.PageSize * pagerContext.PageSize + pagerContext.PageSize,
enabled: lastItemIndex < itemCount - 1));
yield return(new PageLink(
display: "»",
itemIndex: itemCount / pagerContext.PageSize * pagerContext.PageSize,
enabled: lastItemIndex < itemCount - 1));
}
