jQuery Grid Plugin - jqGrid

i,

Thanks for the wonderfull jqgrid. it's very powerfull.

However, For some reasons, I have the following issue, and I hope you can help me with this.

I have a webmethod (JSON) returning 10432 records in total. I am not allowed to change the data returned from this webmethod, so I use the DataType function (thanks for this method!!).

In this function, I call the webmethod, construct an object with the required data like pages, records etc, and load it into the grid using addJSONData. so far, so good.

I enabled true scrolling by setting "scroll: 1″, and it looks perfect.

But: On page 6 (rowNum = 100) record information sais "view 1 – 600 of 10432.

If I continue to scroll to page 7, the Datatype function is called, requesting page 8, which is not what it should have asked, I think.

Record information now is "View 101 – 800 of 10 432″

The behavior of the grid is also quite strange, because the part of the grid you can see jumps to records with numbers like 500 etc. If I try to scroll down, pages 10, 12 and 14 are requested (why not the odd pages?), and the view of the data keeps jumping backwards although I scroll forward. If I finally reach the area containing row 600, I entirely miss rows 601 – 700.

Is this problem known to you?

Thanks for any response!

P.S. I just tested with version 3.7Beta, and the behavior is still the same if requesting the data page by page from the server using the Datatype function.

P.P.S.

I tracked down (part of) the issue to line number 798 of file grid.base.js.

Line sais: page = Math.round((tbot + scrollTop) / div) + 1;

If I investigate the point at which page 7 should be requested, and page 8 actually is, I can see the following:

tbot
286
scrollTop
14716
(tbot + scrollTop)/div
6.522608695652174
Math.round((tbot + scrollTop)/div) + 1
8

So, this issue comes down to a rounding issue, however, I am struggling which parameters/options I can modify to solve this rounding issue.

Could anyone please give me a hand?