分页上下限(Pagination Upper and Lower Limit)

 我试图获得我的分页按钮的上限和下限。 
 
 我想那里总是有9个按钮。 因此，最初以当前页面索引为1，它将是： 
 
 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 
 
 所以我的下限是1，我的上限是9。 
 
 当当前页面索引达到8我希望分页看起来像这样： 
 
 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 
 
 假设总页数为15，当前页面索引为14，分页的格式如下所示： 
 
 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 
 
 我似乎无法得到它恰到好处。 到目前为止，我尝试使用LINQ（这是我想要的方式）： 
 
LowerCount = PageIndex;
HigherCount = (int)PageIndex + 5 < TotalPages ? PageIndex + 5 : TotalPages;

I'm trying to get the upper and lower limit for my pagination buttons.
 
I want there to always be 9 buttons. So initially with a current page index of 1 it would be:
 
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
 
So my lower would be 1 and my upper would be 9.
 
When the current page index gets to 8 I would want the pagination to look like this:
 
| 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
 
Say the total pages where 15 and the current page index is now 14 the pagination would look like:
 
| 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
 
I cant seem to get it just right. My attempt using LINQ so far is (which is way off what I want it to do):
 
LowerCount = PageIndex;
HigherCount = (int)PageIndex + 5 < TotalPages ? PageIndex + 5 : TotalPages;

原文：https://stackoverflow.com/questions/49072242