ansaurus

Question

Answer 1

+2 A:

You are right. It is an old problem. I used always before

$("#list").setGridParam({page:1}).trigger('reloadGrid');

but there is another way. The trigger 'reloadGrid' support additional options: 'current' and 'page'.

$("#list").trigger("reloadGrid", [{page:1}]);

will reset page to 1 in one step. The usage in the form

$("#list").trigger("reloadGrid", [{current:true}]);

allows to preserver current selection. You can of cause combine both options.

Oleg 2010-09-27 21:24:54

Are any of these options a workaround for the bug? That is in my example, can I reload the grid and be on page 2 where the grid will show just records 16-17 ?

Marcus 2010-09-27 21:32:05

And has this bug been reported?

Marcus 2010-09-27 21:32:29

@Marcus: Yes on both your questions. You can directly start with page 2 if you set it in the jqGrid parameters. You can report the bug yourself or I can do this. Currently I want make a short pause, but stay too longer on the stackoverflow. I have to continue my main work... :-). By the way there are currently **only the two options**: `page` and `current`.

Oleg 2010-09-27 21:38:55

@Marcus: I think that the reseting of `page` always to 1 can not be implemented. Sometimes you need refresh the current page (click 'refresh' button on the navigator). In the case the pager should stay unchanged. If you go to the next page, the reload will be also started. So **it is not a bug**. You should just take in consideration to reset `page` to 1 if it needed. For example if you change `url` or the `postData` parameters before you should 'reloadGrid' you should also change the `page` parameter. One more short information to you: I appended your bug report about `onPager`.

Oleg 2010-09-27 22:47:07

Issue is if you're on page 2 - and you are showing records 16-17 of 17 and you STAY on the same page and reload - now you are viewing records a totally different set of records - this doesn't make sense from a UI perspective. After reloading you should still see the same two records - just updated. But what you see is 15 records.

Marcus 2010-09-28 12:32:48

@Marcus: I don't understand why it should like you describe. The server will receive the request with `page=2` and will get the same two rows. Which value of `page` you see send over the wire?

Oleg 2010-09-28 12:48:43

Server does get `page=2`. Grid is using `loadOnce=true` so server is returning all rows. In the server response you get records=17, page=2, total=2 and then 17 row items. jqGrid correctly says we are on page 2 but it is a) showing 15 items instead of the 2 and b) the paging description is incorrect - "displaying 16-30 of 17" - this is obviously all wrong as we only have 17 rows, not 30. So to summarize the data in the grid is correct but jqGrid is displaying the wrong slice of data on page 2 and the paging description is incorrect.

Marcus 2010-09-28 12:58:28

@Marcus: We are speaking a lot of time about two different things. Why you don't write before that you use `loadonce:true`? You wrote only about `datatype:'json'`. If you has `loadonce:true` you has **only short time** `datatype:'json'` and the rest of time you work with `datatype:'local'`! We just spend our time. The `loadonce:true` is design to hold **all the data** locally. So in your case if you change `datatype:'json'` back before reload and want do see the same page which was before reload started you have to change `page` inside of `setTimeout` called in `loadComplete`.

Oleg 2010-09-28 13:34:23

@Marcus: See http://stackoverflow.com/questions/3564898/jqgrid-programatically-select-grid-row/3571392#3571392. As a demo see http://www.ok-soft-gmbh.com/jqGrid/DataToMultiSelect.htm and http://www.ok-soft-gmbh.com/jqGrid/DataToSelect.htm. Then do a little other things abd get information from the `userData`, but the idea is the same. You can hold the information which you need in a locan variables.

Oleg 2010-09-28 13:36:58

In your example why does `getGridParam('page')` always equal 1? If you're on page 2 and you hit reload in the nav, then `getGridParam('page')` will equal 2. So not sure why you have to bother keeping track of the page number and setting the page number in `loadComplete`.

Marcus 2010-09-28 16:55:30

@Marcus: I don't understand what you mean and with what exactly example. I select data and set page number in `loadComplete` because I can do this *after the data are loaded from the server* as JSON per ajax.

Oleg 2010-09-28 17:08:02

In the examples on your website and SO post you have ` var curPage = jQuery("#list").getGridParam('page'); // is always 1` Why is it always 1? If you reload (using the nav) when you are on page 2 then `getGridParam('page')` will already be 2 if you don't explicitly reset it to 1 prior to reload.

Marcus 2010-09-28 17:32:26

Well I tried the examples you mentioned. It works. But the screen flickrs on the load as we are using `setTimeout()` to run the reload in `loadComplete`. So the grid loads on page 1, then reloads in 100 ms on page N. It works but you can see the grid flickr. I tried not using `setTimeout()` but the grid doesn't seem to move to the new page properly.

Marcus 2010-09-28 17:49:14

@Marcus: Now I understand what you mean. `curPage` will be always 1 because it will be get inside of `if (jQuery("#list").getGridParam('datatype') === "json")`. So it will be exacuted **only at the load of data from the server** and not at the next local reloads. So after the grid will be reloaded locally after `trigger("reloadGrid")`. At all next paging or click "Reload" buton of Navigar the code will be not executed. The example is an answer to the question how make **initial data selection** of data loaded from the server per ajax anad `loadonce:true`.

Oleg 2010-09-28 17:55:05

@Marcus: Of cause the grid flickrs a little at every reload, but it works. For me it is not a real problem Do you have a bettr suggestion which also worked and has flickrs?

Oleg 2010-09-28 17:59:41

Thanks Oleg. Not sure I'm going ot use that solution because of the flickering.. wish there was a way to do a reload from the nav without the flicker..

Marcus 2010-09-28 18:10:49

@Markus: It reminds me of a beggar, who is unhappy while he became only $100 and no new BMW. Just reread your original question and count which comment we are written. Do you know a better solution of your problem? Do you want a new BMW for no money? Do you know a better grid as jqGrid? How much you payed for this? Do you can write a better grid for no money and give it other people?... Then just be happy from the things which you have. It is not a little by the way...

Oleg 2010-09-28 19:08:49

Fair enough Oleg. jqGrid is awesome and so is your support!

Marcus 2010-09-28 20:15:46

ansaurus

tags:

views:

answers:

jqGrid paging question

related questions