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https://github.com/romansoloweow/pagination
Paginator display algorithm
https://github.com/romansoloweow/pagination
csharp pagination paginator
Last synced: 9 days ago
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Paginator display algorithm
- Host: GitHub
- URL: https://github.com/romansoloweow/pagination
- Owner: RomanSoloweow
- License: mit
- Created: 2021-01-22T15:06:54.000Z (almost 4 years ago)
- Default Branch: main
- Last Pushed: 2021-01-22T15:18:47.000Z (almost 4 years ago)
- Last Synced: 2024-12-19T10:25:43.429Z (15 days ago)
- Topics: csharp, pagination, paginator
- Homepage:
- Size: 25.4 KB
- Stars: 1
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# Pagination
## Algorithm code
``` c#
int countRecords = ...;
int countOnPage = ...;
int currentPage = ...;
if (countRecords > 0 && countOnPage > 0)
{
int pageSkip = currentPage-1;//how many pages are skipped
int countPages = (int)Math.Ceiling((countRecords / 1.0) / countOnPage); //how many pages
int countOtherPage = countPages - currentPage;//how many pages are ahead
int step = 2;//Indent to the left and right of the current page in the center block
int stepLeft = 2;//size of left part
int stepRight = 2;//size of right part
//Left and right values calculation
int left = (pageSkip >= step) ? step : pageSkip % (step);
int right = (countOtherPage >= step) ? step : countOtherPage % (step);
if (left + right < countPages - 1)
{
// if not enough on the left - add on the right (so that there are always 2 * step + 1 pages)
if (left < step)
{
int diff = step - left;
diff = ((countOtherPage >= (right + diff)) ? diff : countOtherPage - diff);
right += diff > 0 ? diff : 0;
}
// if not enough on the right - add on the left (so that there are always 2 * step + 1 pages)
if (right < step)
{
int diff = step - right;
diff = (pageSkip >= (left + diff)) ? diff : pageSkip - diff;
left += diff > 0 ? diff : 0;
}
}
//Go to page button
if (countPages > (2 * step + 1))//if not all pages fit into the central panel
{
//Here you create go to page button with input
}
//Left part
if (pageSkip > left)
{
int diff = (pageSkip >= (step + stepLeft)) ? stepLeft : (pageSkip - step);
for (int i = 1; i < 1 + diff; i++)
{
//Here you create buttons with a redirect to the i-th page
}
//here ...
}
//Middle part
if (countPages > 1)
{
for (int i = currentPage - left; i <= currentPage + right; i++)
{
//Here you create buttons with a redirect to the i-th page
}
}
//Right part
if(countOtherPage> right)
{
//here ...
int diff = (countOtherPage >= (step + stepRight)) ? stepRight : (countOtherPage - step);
for (int i = countPages - diff + 1; i <= countPages; i++)
{
//Here you create buttons with a redirect to the i-th page
}
}
}
```